Monitor indicator system

Abstract

A method for monitoring the concentration of a disinfectant in a solution includes providing a device comprising multiple sensors. The method continues to a calibration phase via the device, the calibration phase including placing the device in disinfectant-free water, wherein the device: determines the temperature of the water; performs water analysis; and measures the baseline resistance of the water via at least one sensor. A disinfectant compound is added to the water; and the device performs an operation phase, wherein the device: determines the resistance of the water containing the disinfectant compound; calculates the concentration of the disinfectant compound in the water, wherein the concentration is based on the water temperature, water analysis, and baseline resistance; compares the calculated concentration with a predetermined threshold concentration; and activates an indication module of the device based on the comparison of the calculated concentration with the predetermined concentration.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to U.S. Application No. 18 / 067,527, filed December 16, 2022, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0003] This disclosure generally relates to the field of disinfection monitoring and indication. More specifically, this disclosure relates to the field of monitoring and indicator systems for disinfection systems. Background Technology

[0004] Disinfection systems are used to reduce the presence of microorganisms on surfaces. Microbial growth can occur when utensils are not cleaned properly or in a timely manner, which can have adverse effects on the public. Food surfaces that have come into contact with improperly prepared or refrigerated foods can contaminate other foods, which can have harmful effects if ingested. Therefore, maintaining clean and disinfected food contact surfaces (such as knives and other utensils) is an integral part of the food service industry.

[0005] Different chemicals can be used as disinfectants in disinfection solutions. Commonly used chemicals include chlorine (bleach), quaternary ammonium salts, and iodine. Disinfection solutions containing one or more of these chemicals must be replaced periodically during the disinfection process because the concentration of these chemicals decreases over time, eventually losing their disinfecting effect. Laws, regulations, and / or policies typically require the concentration of disinfecting chemicals to be within a certain range to ensure the desired disinfection effect. For example, chlorine disinfection solutions typically require a chlorine concentration of 50 ppm to 200 ppm (parts per million); quaternary ammonium salt disinfection solutions typically require a quaternary ammonium salt concentration of 100 ppm to 400 ppm; and iodine disinfection solutions typically require an iodine concentration of 5 ppm to 50 ppm. Summary of the Invention

[0006] The following is a concise overview of the invention to provide a basic understanding of some aspects of it. This overview is not a comprehensive summary of the invention. It is not intended to identify key elements or define the scope of the invention. Its sole purpose is to present some concepts of the invention in a concise form as a prelude to a more detailed description given elsewhere.

[0007] According to one embodiment of the present invention, a monitoring indicator system includes a sensor section, a control indicator section, and a power supply section. The monitoring indicator system is configured to: (a) monitor the concentration of disinfectant in a disinfection solution; (b) determine the depletion of disinfectant when the concentration of disinfectant is detected to become equal to or below a predetermined threshold concentration level; and (c) indicate the depletion of disinfectant in the disinfection solution by issuing a notification.

[0008] According to another embodiment of the present invention, a method for monitoring the concentration of a disinfectant chemical in a disinfectant solution includes: (a) providing a container; (b) filling the container with a disinfectant solution including a disinfectant; (c) placing a monitor indicator system having a sensor portion, a control indicator portion, and a power supply portion in the container; (d) activating the monitor indicator system to measure the concentration of the disinfectant; (e) activating the monitor indicator system to issue a first notification when the measured concentration of the disinfectant in the disinfectant solution is higher than a predetermined threshold concentration level; (f) activating the monitor indicator system to issue a second notification to indicate the depletion of the disinfectant solution when the measured concentration of the disinfectant in the disinfectant solution becomes equal to or lower than the predetermined threshold concentration level; (g) replacing the depleted disinfectant solution with a new batch of disinfectant solution having a disinfectant concentration higher than the predetermined threshold concentration level; (h) disposing of the monitor indicator system; and (i) placing a new monitor indicator system in a kitchen container containing a new batch of disinfectant solution.

[0009] In another embodiment, an apparatus for monitoring the concentration of a disinfectant compound in water includes a power module, a sensor section including multiple sensors, and a control indication section. The control indication section includes a processor operatively communicating with an indication module and a non-transitory computer memory having a programming program. The programming program, when executed by the processor, performs the following steps: (1) performing a calibration phase, the calibration phase including (i) determining the temperature of a water sample from a water source, the water sample containing no disinfectant compound, via at least one of the multiple sensors; (ii) measuring the characteristics of the water sample via at least one of the multiple sensors; and (iii) measuring the baseline resistance of the water sample via at least one of the multiple sensors; and (2) performing an operation phase, the operation phase including (iv) determining the resistance of a disinfectant solution, wherein the disinfectant solution includes water from a water source and at least one disinfectant compound; (v) calculating the concentration of the disinfectant solution, wherein the concentration is based on the temperature of the water sample, the characteristics of the water sample, and the baseline resistance of the water sample; (vi) comparing the calculated concentration with a predetermined threshold concentration stored in a memory; and (vii) activating the indication module based on the comparison of the calculated concentration with the predetermined concentration.

[0010] According to another embodiment, a method for monitoring the concentration of a disinfectant in a solution includes first providing a device comprising multiple sensors for monitoring the concentration of the disinfectant. The method continues by performing a calibration phase via the device, the calibration phase including placing the device in water without the disinfectant, wherein the device: determines the temperature of the water; performs water analysis; and measures the baseline resistance of the water via at least one of the multiple sensors. A disinfectant compound is then added to the water; and the device performs an operation phase, wherein the device: determines the resistance of the water containing the disinfectant compound; calculates the concentration of the disinfectant compound in the water, wherein the concentration is based on the water temperature, water analysis, and baseline resistance; compares the calculated concentration with a predetermined threshold concentration; and activates an indication module of the device based on the comparison of the calculated concentration with the predetermined concentration.

[0011] In another embodiment, the method for monitoring the concentration of a disinfectant compound in a solution includes first providing an apparatus for monitoring the concentration of the disinfectant solution. The apparatus includes: a power module; a sensor section including multiple sensors; and a control indication section. The method continues to a calibration phase, which includes placing the apparatus in water free of disinfectant. In the water, the apparatus: determines the temperature of the water; measures the value of the water's conductivity via at least one of the multiple sensors; and measures the baseline resistance of the water via at least one of the multiple sensors. The method continues to an operation phase, which involves adding at least one disinfectant compound to the water. In the operation phase, the apparatus: determines the resistance of the water containing at least one disinfectant compound; calculates the concentration of at least one disinfectant compound in the water, wherein the concentration is based on the water's temperature, conductivity, and baseline resistance; compares the calculated concentration with a predetermined threshold concentration; and activates the indication module based on the comparison of the calculated concentration with the predetermined concentration. Attached Figure Description

[0012] Several illustrative embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0013] Figure 1 An embodiment of the monitor indicator system is shown.

[0014] Figure 2 An exemplary embodiment of a monitor indicator system is shown.

[0015] Figure 3 An exemplary embodiment of a disposable screen-printed electrode is shown.

[0016] Figure 4 An example of a disposable screen-printed electrode is shown.

[0017] Figure 5 An exemplary embodiment of the power supply section and control indication section of the monitor indicator system is shown.

[0018] Figure 6A and Figure 6B An embodiment of a monitor indicator system with different external indication functions is shown.

[0019] Figure 7 An embodiment of a kitchen facility with a monitor indicator system is shown.

[0020] Figure 8 This is a schematic diagram of another embodiment of the monitor indicator system of the present invention.

[0021] Figure 9 yes Figure 8 A schematic diagram of the processing system of the monitor indicator system.

[0022] Figure 10 This is a flowchart illustrating the steps for monitoring a disinfectant solution according to an embodiment of the present invention.

[0023] Figure 11a and Figure 11b The results of various tests conducted on the monitoring of disinfectant solutions are presented.

[0024] Figure 12 It shows a graph of total dissolved solids and count versus concentration. Detailed Implementation

[0025] All states have food service guidelines and regulations that specify acceptable methods and times for cleaning utensils such as knives, spoons, and forks. Regulations typically require that the concentration of disinfecting chemicals be within a certain range to ensure the desired disinfection effect. However, maintaining this appropriate level of cleanliness depends on the attentiveness and common sense of those responsible for ensuring compliance with the guidelines and regulations. For example, while chlorine disinfectant solutions are very effective in killing bacteria and other microorganisms and preventing contamination in the food industry, the chlorine concentration in the solution decreases over time, thus losing its disinfecting effect after exposure to substances such as food residue. If no one checks the concentration of the solution, it may not effectively disinfect utensils.

[0026] Depending on the food the utensils come into contact with, they may need to be cleaned with disinfectant solutions very frequently. Therefore, the disinfection process is often laborious and time-consuming, and the disinfectant solution can be depleted quickly, which is particularly inconvenient during peak service hours such as lunch and dinner. In some cases, food industry personnel may not always be able to use traditional chlorine test strips to measure the chlorine concentration of the disinfectant solution in a timely manner, and therefore may not be able to replace the depleted solution promptly. Therefore, a simple, automated, reliable, and low-cost monitoring indicator system may be desirable to better alert food industry personnel and notify them when the depleted chlorine solution needs to be replaced. Other disinfectant chemicals have the same or similar drawbacks.

[0027] Figures 1-7 Examples of systems and methods for monitoring the efficacy of disinfectant solutions are illustrated below. First, refer to... Figure 1 In some embodiments, the monitor indicator system 100 typically includes a sensor section 110, a control indicator section 120, and a power supply section 130. The sensor section 110 may include a disposable screen-printed electrode system, which can be a multi-electrode system, such as a dual-electrode system, a three-electrode system, a four-electrode system, etc. Figure 1 In the illustrated three-electrode system, the disposable screen-printed electrode system may include a counter electrode 111, a working electrode 112, and a reference electrode 113. The sensor portion 110 may be covered (or laminated in some embodiments) with a top insulating layer 114 having an opening 115 to simultaneously expose portions of the counter electrode 111, working electrode 112, and reference electrode 113, while sealing the remainder of the sensor portion 110 to protect it from external environmental influences (e.g., gases, liquids, solids). The control and indication portion 120 may include a constant potential module 121, an analog-to-digital converter (ADC) module 122, a processor module 123, and an indication module 124. The power supply portion 130 may include a power supply module 131.

[0028] As will be described in more detail below, in this embodiment, the sensor portion 110, the control indication portion 120, and the power supply portion 130 may be manufactured separately and configured to be connected together. One or more of portions 110, 120, and / or 130 may be configured as stickers that can be placed on the side of the container. In other embodiments, portions 110, 120, and 130 may be manufactured together as a single, disposable, configurable monitor indicator system 100, which may be, but does not have to be, a sticker.

[0029] In any case, the user can place the system 100 inside an appliance containing a disinfectant solution. The concentration of the disinfectant solution will gradually decrease over time with use. The sensor portion 110 can determine the concentration of the disinfectant (e.g., chlorine) in the disinfectant solution in real time, as described herein. When the indicator module 124 is activated, the user knows that the concentration of the disinfectant solution is below a lower limit and that the depleted disinfectant solution can sometimes be replaced with a new batch of disinfectant solution containing a disinfectant chemical at a concentration higher than a predetermined threshold concentration level. If the system 100 is disposable, a new sticker 100 can be placed in a new batch of disinfectant solution, or the disposable portion of the system 100 can be replaced.

[0030] Figure 2A monitor indicator system 100 according to various embodiments is shown. In embodiment 210, the control indicator portion 212 and power supply portion 213 of the monitor indicator system 100 may be enclosed within an outer housing 214, which is configured to connect to the sensor portion 211 of the monitor indicator system 100 via a connection port 215. In this embodiment 210, the sensor portion 211 of the monitor indicator system 100 may be disposable and may be replaced after a single test, multiple tests, or a predetermined testing period. The control indicator portion 212 and power supply portion 213 enclosed within the outer housing 214 may be disposable or permanent. And in some embodiments, the outer housing 214 may be free or fixed inside or outside the disinfectant solution.

[0031] In embodiment 220, the sensor portion 221 and the control indication portion 222 of the monitor indicator system 100 can be manufactured as a single, disposable component that can be replaced after a single test, multiple tests, or a predetermined testing period. The disposable component, including the sensor portion 221 and the control indication portion 222, can be connected to the power supply portion 223 via a connection port 225. The power supply portion 223 of the monitor indicator system 100 can be enclosed in an outer housing 224. In some embodiments, the outer housing 224 can be free or fixed, either inside or outside the disinfectant solution.

[0032] In embodiment 230, the sensor portion 231, the control indication portion 232, and the power supply portion 233 can be manufactured as a single unit and serve as a disposable monitor indicator system 100. This disposable monitor indicator system 100 can be a sticker and can be disposed of after a single test, multiple tests, or a predetermined testing period. Similar to embodiments 210 and 220, in embodiment 230, the disposable monitor indicator system 100 can be free-standing or fixed inside or outside the disinfectant solution.

[0033] Despite Figure 2 Only three embodiments 210, 220, and 230 of the monitor indicator system 100 are shown, but it should be understood that the sensor portion 231, control indicator portion 232, and power supply portion 233 of the monitor indicator system 100 can be manufactured individually or in combination as disposable or permanent components. Furthermore, they can also be used individually or in combination as disposable or permanent components.

[0034] Next, Figure 3A disposable screen-printed electrode 300 is shown, which can be used alone or in combination as the sensor portion 110 of a monitor indicator system 100. The disposable screen-printed electrode 300 may include a counter electrode 310, a working electrode 320, and a reference electrode 330. These electrodes may be made alone or in combination of materials such as platinum, palladium, gold, silver, silver chloride, potassium chloride, nickel, aluminum, calcium, cesium, bromine, lithium, molybdenum, copper, zinc, cobalt, brass, titanium, thorium, zirconium, lanthanum, cerium, ruthenium, iridium, manganese, cadmium, indium tin oxide, graphite, graphene, carbon, lead, pencil lead, ceramics, plastics, polymers, nanotubes, nanowires, nanorods, boron-doped diamond, diamond, ferrocene, benzyl chloride, and mixed metal oxides including oxides of the noble metals ruthenium, iridium, platinum, and titanium.

[0035] The disposable screen-printed electrode 300 may further include a base film 340, on which the counter electrode 310, the working electrode 320 and the reference electrode 330 are disposed. The base membrane 340 may be made, alone or in combination, of materials such as glass, aluminum, ceramics, metals, paper, wax, silicon, silicon carbide, polyester, cyclic olefin copolymers, polyethylene, polyethylene terephthalate, polypropylene, polystyrene, polyvinylidene chloride, polyvinylidene fluoride, polyamide, polyimide, polychlorotrifluoroethylene, polycarbonate, polyurethane, acrylonitrile-butadiene-styrene copolymer, polyacetylene, polytetrafluoroethylene, phenolic plastics, polyimide, polysulfone, polypyrrole, para-aromatic polyamide, polychloroprene, polyaniline, polythiophene, polyvinylpyrrolidone, polystyrene sulfonate, polyacrylonitrile, phenolic resin, furan, silicone, polymethyl methacrylate, ethyl cellulose, polyetheretherketone, polyethylene naphthalate, and other suitable polymeric materials. In some embodiments, the base membrane may be a rigid or flexible strip. Optionally, the basement membrane 340 is configured to survive in a temperature range from about -20°C (-4℉) to about 150°C (302℉).

[0036] An insulating layer 350 with an opening 360 can be disposed on the top of the base film 340, the insulating layer 350 covering electrodes 310, 320 and 330. Although Figure 3 The opening 360 of the insulating layer 350 shown has a rectangular configuration, but it should be understood that the opening 360 can be of any shape, as long as it simultaneously exposes portions of the counter electrode 310, the working electrode 320 and the reference electrode 330, while sealing the remaining portion of the disposable screen-printed electrode 300 to protect it from external environmental factors (e.g., gases, liquids, solids).

[0037] Figure 4Some further exemplary embodiments 410, 420, 430 and 440 of the disposable screen-printing electrode 110 are shown. The screen-printing electrode in embodiments 410, 420, 430 and 440 each includes three electrodes, each having its own electrode shape arrangement.

[0038] These electrodes can be configured to measure voltage and current within a solution. Based on the results, it can be determined whether the solution is within acceptable limits, and therefore whether it needs to be modified.

[0039] In this embodiment, the screen-printed electrode 110 can be replaced with a chemically sensitive field-effect transistor (ChemFET). The ChemFET can be used as a sensor to measure the chemical concentration of the disinfectant solution. As the chemical concentration of the disinfectant solution changes, the current through the transistor changes accordingly.

[0040] Figure 5 The control and indication section 520 of the monitor indicator system 100 (roughly corresponding to) is shown. Figure 1 The embodiments of the control indication section 520 and power supply section 530 (generally corresponding to power supply section 130) are described. The control indication section 520 may include a potentiostat module 521, an analog-to-digital converter module 522, a processor module 523, and an indication module 524. In some embodiments, the potentiostat module 521 may receive electrochemical signals from disposable screen-printed electrodes in a sensor section 510 (generally corresponding to sensor section 110, also described as embodiments 300, 410, 420, 430, and 440). The potentiostat module 521 may be further electrically connected to the processor 523 via the analog-to-digital converter 522. The analog-to-digital converter 522 may convert the analog signals received from the potentiostat module 521 into digital signals and then send the converted digital signals to the processor 523. Based on the digital signals received from the analog-to-digital converter 522, the processor 523 may determine whether the measured concentration of the disinfectant solution is above, within, or below the target range, and then actuate the indication module 520 accordingly based on the concentration measurement value, as will be described in more detail below. Processor 523 can enable indicator module 524 to: (1) activate low-power light source 605 ( Figure 6A and Figure 6B(1) Provide one or more alarm notifications to the user; (2) Activate its internal transmission module to wirelessly or wiredly transmit one or more alarm notifications to a remote device; (3) Activate its internal mechanical mechanism to release a notification of a specific color dye; and / or (4) Activate a speaker to play the notification message. The power supply section 530 of the monitor indicator system 100 may include a power module 531, which may be a battery (which may be configured to have a predetermined shelf life), an internal electrochemical source powered by chemical or electrochemical energy, a power interface connected to an external power source via wired or wireless connection, or any other device (whether now known or developed in the future) that provides the necessary power to the system.

[0041] In some embodiments, the indicator module 524 may include one or more low-power light sources, such as ultra-low-power light-emitting diodes (LEDs), low-power lamps, low-power bulbs, or low-power light sources. In an example, the indicator module may include one or more red ultra-low-power LED units, which are activated when the concentration of the disinfectant solution is equal to or below a predetermined concentration threshold level. The indicator module 524 may further include one or more green ultra-low-power LED units, which are activated when the concentration of the disinfectant solution is above a predetermined concentration threshold level.

[0042] In other embodiments, the indication module 524 may include a transmission module configured to transmit alarm notifications (e.g., wirelessly) to a remote device. In an example, the indication module 524 may be activated to send a wireless notification to the remote device when the concentration of the disinfectant solution becomes equal to or below a predetermined concentration threshold level. Optionally, the indication module 524 may transmit a notification indicating the real-time chlorine concentration of the chlorine disinfectant solution or simply indicating that the concentration is above / below a threshold to the remote device at predetermined intervals. Optionally, the notification may be a precise concentration.

[0043] In another embodiment, the indicating module 524 may include a mechanical mechanism for releasing dye into the disinfectant solution. Depending on the application, a single dye or a combination of dyes may be used. For example, when the concentration becomes equal to or below a predetermined concentration threshold level, the non-reactive food dye can be released and dissolved in the disinfectant solution. Therefore, the user can easily detect when the disinfectant solution is depleted and needs to be replaced.

[0044] In another embodiment, the non-reactive dye can be released into the monitor indicator system 100 instead of being released and dissolved in the disinfectant solution. Of course, both reactive and non-reactive dyes can be used alone or in combination.

[0045] While the above embodiments illustrate some specific configurations of the monitor indicator system 100, it should be understood that other configurations may exist that can achieve similar functionality and / or similar results. For example, it should be understood that in some embodiments, the control indicator portion 520 (generally 120) and the power supply portion 530 (generally 130) may be manufactured together, enclosed in an outer housing, and connected to the sensor portion 510 (generally 110) of the monitor indicator system 100 via a connection port. In this case, the sensor portion 510 of the monitor indicator system 100 may be disposable and can be replaced after a single test, multiple tests, or a predetermined testing period. The control indicator portion 520 and the power supply portion 530 enclosed in the outer housing may be disposable or permanent. Therefore, the user can replace the sensor portion 510 when replacing the depleted solution with a new batch of solution without discarding the outer housing enclosing the control indicator portion 520 and the power supply portion 530. In other embodiments, the control indication section 520 and the sensor section 510 can be manufactured together as a disposable part, which is connected to the power supply section 530 via a connection port. The power supply section 530 can be independently encapsulated in another external housing. In this case, whenever the depleted solution is replaced with a new batch, the user can replace the disposable part containing the sensor section 510 and the control indication section 520 without discarding the power supply section 530.

[0046] Next, Figure 6A and Figure 6B Further embodiments of a monitor indicator system 100 with various external indication functions are shown to indicate the acceptable and / or unacceptable state of a disinfectant solution based on whether the measured concentration level of the disinfectant solution is higher than a predetermined concentration threshold level. Figure 6A and Figure 6B As shown, the monitor indicator system 100 may include a base film layer 601 and an insulating layer 602. The insulating layer 602 may include a display area 604 configured to display a notification 605. In some examples, such as... Figure 6A As shown, when the concentration of the disinfectant solution exceeds a predetermined concentration threshold, display area 604 can be activated to display a checkmark 605. The color of the checkmark can be a color easily recognizable as indicating a "good" state, such as green. In other examples, for instance... Figure 6B As shown, when the concentration of the disinfectant solution becomes equal to or lower than a predetermined concentration threshold level, the display area 604 of the monitor indicator system 100 can be activated to display a cross mark 605. The color of the cross mark can be a color easily identified as indicating a "bad" state, such as red.

[0047] Figure 7A sterilizer monitor 100 in use is shown. Here, a container 700 may be filled with a disinfectant solution 710 and positioned near a food processing plant. The disinfectant solution 710 can be used to sterilize used kitchen utensils. A user can freely place the monitor indicator system 100 (which may be a sticker) within the kitchen container 700 or in a fixed location. The monitor indicator system 100 can begin operating immediately upon contact with the disinfectant solution (e.g., it may be powered by an electrical charge from the disinfectant solution). The monitor indicator system 100 can continuously measure the concentration of disinfectant compound elements in the disinfectant solution 710, as described above. When the concentration of the disinfectant solution exceeds a predetermined concentration threshold, the monitor indicator system 100 can activate the indicator module 124 to issue a first notification (e.g., light indication, wired or wireless signal, dye, sound, etc.), or the system 100 can remain dormant. When the concentration of the disinfectant solution becomes equal to or below a predetermined concentration threshold, the monitor indicator system 100 activates the indicator module 124 to issue a second notification indicating that the disinfectant solution needs to be changed (e.g., light indicator, wired or wireless signal, dye, sound, etc.). Kitchen staff will see the notification and subsequently replace the depleted disinfectant solution with a new batch of disinfectant solution containing a disinfectant chemical at a concentration higher than the predetermined threshold level. Kitchen staff may place the used sticker monitor indicator system 100 (or, depending on the situation, a portion of its system 100) and insert a new monitor indicator system 100 into the container 700.

[0048] In an embodiment, a method for maintaining the concentration of a disinfectant solution may include the steps of: (a) providing a container; (b) filling the container with a disinfectant solution containing a disinfectant chemical; (c) placing a first monitoring indicator system in or on the container, wherein the system has a viscous area; (d) activating the monitoring indicator system to measure the concentration of the disinfectant chemical; and (e) activating the monitoring indicator system to issue a notification when the measured concentration of at least one disinfectant chemical is above a predetermined threshold concentration level, thereby indicating the depletion of the disinfectant solution. The method may further include: (f) replacing the depleted disinfectant solution with a new batch of disinfectant solution containing a disinfectant chemical at a concentration above the predetermined threshold concentration level; (g) disposing of the first monitoring indicator system; and (i) placing a second monitoring indicator system on the surface of the kitchen container.

[0049] In other embodiments, a method for monitoring and indicating the concentration of a disinfectant solution may include the following steps: (a) providing a container; (b) filling the container with a disinfectant solution containing a disinfectant chemical substance; (c) placing a monitor indicator system having a sensor portion, a control indicator portion, and a power supply portion in the container containing the disinfectant solution; (d) activating the monitor indicator system to measure the concentration of the disinfectant chemical substance; (e) activating the monitor indicator system to issue a first notification when the measured concentration of the disinfectant chemical substance is higher than a predetermined threshold concentration level; (f) activating the monitor indicator system to issue a second notification when the measured concentration of the disinfectant chemical substance becomes equal to or lower than the predetermined threshold concentration level, thereby indicating the depletion of the disinfectant solution; (g) replacing the depleted disinfectant solution with a new batch of disinfectant solution containing a disinfectant chemical substance at a concentration higher than the predetermined threshold concentration level; (h) disposing of the monitor indicator system; and (i) placing the new monitor indicator system freely or in a fixed position in a kitchen container containing a new batch of disinfectant solution.

[0050] In another embodiment, a method for monitoring and indicating the concentration of a disinfectant solution may include the following steps: (a) providing a container; (b) filling the container with a disinfectant solution containing disinfectant chemicals; (c) providing a housing having a power supply portion (e.g., a battery) of a monitor indicator system, the monitor indicator system including a sensor portion and a control indicator portion located within the container containing the disinfectant solution, wherein the portions are independent and the sensor portion is disposable; (d) placing the housing having the power supply portion freely or in a fixed position within the container containing the disinfectant solution; (e) connecting the disposable sensor portion and control indicator portion of the monitor indicator system to the housing via a connection connector; (f) activating the monitor indicator system to measure the concentration of the disinfectant chemical. (f) When the concentration of the measured disinfectant chemical is higher than a predetermined threshold concentration level, activate the monitor indicator system to issue a first notification; (g) When the concentration of the measured disinfectant chemical becomes equal to or lower than the predetermined threshold concentration level, activate the monitor indicator system to issue a second notification, thereby indicating the depletion of disinfectant solution; (h) Replace the depleted disinfectant solution with a new batch of disinfectant solution with a concentration of disinfectant chemical higher than the predetermined threshold concentration level; (i) Dispose of the sensor portion and control indication portion of the monitor indicator system; and (j) Connect the new sensor portion and new control indication portion of the monitor indicator system to the housing of the power supply portion in the container with the new batch of disinfectant solution via a connection socket.

[0051] In this embodiment, the monitor indicator system 100 can be particularly useful in the food industry to monitor and / or indicate the concentration of disinfectant chemicals in a disinfectant solution used to clean kitchen utensils, and optionally send a notification when the concentration of the disinfectant compound element becomes equal to or below a predetermined level, as described herein. For example, the disinfectant solution can be used to clean and disinfect surfaces that come into contact with food, such as knives, spoons, forks, and other utensils.

[0052] Disinfectants can be one or more of the following chemicals: alcohols, formalin, glutaraldehyde, hydrogen peroxide, ozone, potassium permanganate, peroxyacids, phenols, quaternary ammonium compounds, chlorine, hypochlorite, hypochlorous acid, iodine, povidone-iodine, sodium hydroxide, potassium hydroxide, calcium hydroxide, magnesium hydroxide, sulfurous acid, sulfur dioxide, thymol, pine oil, lactic acid, sodium bicarbonate, polyaminopropyl biguanide, diethylene glycol, benzyl chloride, etc.

[0053] The monitor indicator system 100 can be used to test, monitor, and / or indicate the chlorine concentration of a chlorine disinfection solution prepared by adding chlorine or one or more chlorine compounds (e.g., sodium hypochlorite) to water. The chlorine concentration can range from 10 ppm to 200 ppm. Optionally, the upper limit of the chlorine concentration can be 200 ppm, and the lower limit can be 50 ppm. The chlorine concentration threshold can be set between 10 ppm and 200 ppm, and in embodiments, can be, for example, 50 ppm, 75 ppm, 100 ppm, 125 ppm, 150 ppm, or 175 ppm.

[0054] In this embodiment, the monitor indicator system 100 is used to test, monitor, and / or indicate the quaternary ammonium salt concentration of the quaternary ammonium salt disinfectant solution. The quaternary ammonium salt concentration can range from 100 ppm to 400 ppm. In this embodiment, the upper limit of the quaternary ammonium salt concentration can be 200 ppm, and the lower limit can be 150 ppm. The quaternary ammonium salt concentration threshold can be set between 100 ppm and 400 ppm, and in this embodiment, it can be, for example, 100 ppm, 125 ppm, 150 ppm, 175 ppm, 200 ppm, 225 ppm, 250 ppm, 275 ppm, 300 ppm, 325 ppm, 350 ppm, 375 ppm, or 400 ppm.

[0055] In other embodiments, the monitor indicator system 100 is used to test, monitor, and / or indicate the iodine concentration of the iodine disinfectant solution. The iodine concentration can range from 5 ppm to 50 ppm. In embodiments, the upper limit of the iodine concentration can be 25 ppm, and the lower limit of the iodine concentration can be 12.5 ppm. The iodine concentration threshold can be set between 5 ppm and 50 ppm, and in embodiments, it can be, for example, 5 ppm, 10 ppm, 15 ppm, 20 ppm, 25 ppm, 30 ppm, 35 ppm, 40 ppm, 45 ppm, or 50 ppm.

[0056] As briefly described above, the monitor indicator system can be a sticker with a generally rectangular shape. The length of the monitor indicator sticker system can be from 1 inch to 10 inches, the width of the monitor indicator sticker system can be, for example, from 0.5 inches to 5 inches, and the depth of the monitor indicator sticker system can be, for example, from 0.1 inches to 5 inches. In an exemplary embodiment, the length of the monitor indicator sticker system can be from 2 inches to 3 inches, and the width of the monitor indicator system can be about 1 inch. Other shapes and configurations of the sticker are also contemplated within the scope of this invention.

[0057] During testing, it was determined that water quality affects the testing equipment's ability to accurately determine concentrations. More specifically, the results are more accurate when water temperature, total dissolved solids (TDS), pH, and / or hardness levels are considered when determining the concentration of the disinfectant solution. Therefore, in this embodiment, the monitor indicator system can be configured to operate in two modes: a calibration mode and an operation / measurement mode. As will be described in more detail below, in calibration mode, the testing equipment determines one or more characteristics of water without a disinfectant solution. Subsequently, a disinfectant solution / compound is added to the water, and the equipment enters measurement mode to determine the concentration of the disinfectant in the water.

[0058] Figure 8 and Figure 9 A dual-mode monitor indicator system 800 according to an embodiment of the present invention is generally illustrated. In general, the monitor indicator system 800 may be similar to the monitor indicator system 100. For example, the monitor indicator system 800 may include a sensor section 810, a control indicator section 820, and a power supply section 830.

[0059] The sensor section 810 may include one or more sensors, such as 811, 812, and 813. Although in Figure 8 and Figure 9Three sensors 811, 812, and 813 are shown, but it should be understood that more or fewer sensors may be included within sensor section 810. Sensors 811, 812, and 813 may include a temperature sensor, a pH sensor, a light sensor, a total dissolved solids (TDS) meter, a water hardness meter, and / or a sensor for determining the concentration of disinfectant in a disinfectant solution. The sensor for determining the concentration of disinfectant in the solution may be any sensor now known or developed hereafter, such as the inductive conductivity sensor described herein. The conductivity sensor may include analog sensing circuitry and may be configured to measure the resistance of the solution, as known to those skilled in the art, which can be used to calculate the concentration.

[0060] The control instruction section 820 may include a processor 823, an instruction module 824, and a memory 825 that houses software (also referred to herein as a programming program) 826 for controlling the operation of the device 800. The processor 823 represents one or more digital processors. In some example embodiments, the processor 823 may be configured to perform the functions disclosed herein by specially configured hardware (such as application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), etc.) and / or by executing software.

[0061] Memory 825 represents one or more of volatile memory (e.g., RAM (random access memory)) and non-volatile memory (e.g., ROM (read-only memory), FLASH (flash memory), magnetic media, optical media, etc.). Although shown within control instruction section 820, memory 825 may be implemented at least partially as network storage external to control instruction section 820 and accessed via a network interface. Programming program 826 may be stored in a transient or non-transient portion of memory 825. Programming program 826 includes machine-readable instructions that are executed by processor 823 to perform the functions of device 800 as described herein.

[0062] Processor 823 is operable in communication with memory 825, indication module 824, sensor section 810 (more specifically, with sensors 811, 812, and 813), networking device 815, and input device 829. Processor 823 is configured to receive information from one or more sensors 811, 812, and 813 in conjunction with programming program 826, process that information, and provide a corresponding response via indication module 824. As described herein, concentration determination can be affected by water temperature, TDS, pH, and / or water hardness. Therefore, sensors 811, 812, and 813 (e.g., temperature sensors, TDS meters / sensors, pH sensors, and / or electronic water hardness meters) inform programming program 826, and programming program 826 uses this information, along with information from, for example, a conductivity sensor, to make a more accurate concentration determination.

[0063] The indicator module 824 may include one or more lights, but may additionally or alternatively use other indicators (e.g., speakers, dyes, etc.), and the indicator module 824 is configured to activate when the programming program 826 determines that the concentration of the disinfectant solution is outside a predetermined threshold. The indicator module 824 may be activated when the disinfectant concentration is above, at, and / or below the predetermined threshold.

[0064] The networking device 815 can be configured to allow device 800 to communicate via wired and / or wireless networks; for example, such as Figure 8 As shown, the networking device 815 can allow device 800 to communicate with input device 829 via network 817 (e.g., Wi-Fi, Internet, Bluetooth or other wired or wireless networks).

[0065] Input device 829 may have suitable hardware and / or software that allows it to communicate with device 800 via network 817. In embodiments, input device 829 may be hardwired to device 800 instead of being network-connected to device 800. Input device 829 may be, for example, a scanner, such as a one-dimensional barcode or two-dimensional QR (Quick Response) code scanner. Input device 829 may additionally or alternatively include a computer mouse, camera, keyboard, any other input device now known or developed in the future, and input device 829 may include a user interface. For example, input device 829 may be a computer including a keyboard and / or mouse. Input device 829 may be provided to provide additional and / or alternative information to device 800. As described below, memory 825 may include thresholds for different disinfectant compounds, allowing device 800 to determine how and / or when to activate indication module 824. Processor 823 may access memory 825 to access the stored thresholds. In one embodiment, device 800 may be able to analyze what disinfectant compound is being used in the water without requiring input device 829 to provide information. However, in other embodiments, input device 829 may be used to inform device 800 what disinfectant compound is being used, allowing the correct threshold to be accessed in memory 825. For example, the disinfectant compound (e.g., an information packet) may include a barcode, and input device 829 may be configured as a scanner. When a user prepares a disinfectant solution, they can use scanner 829 to scan the barcode associated with the disinfectant compound. This information is then used by processor 823 to access the threshold corresponding to that specific disinfectant compound from memory 825. In another example, input device 829 is a computer. A user can use a computer mouse and / or keyboard to inform device 800 what disinfectant compound is being used, allowing device 800 to access the threshold corresponding to that specific disinfectant compound from memory 825.

[0066] Input from input device 829, and particularly information about the disinfectant compound used, can be additionally or alternatively used by programming program 826 to determine whether the disinfectant solution meets the corresponding threshold. Even if the disinfectant compounds are largely the same, disinfectant compounds from different manufacturers may have different active ingredients (or different proportions of active ingredients). For example, although two products may be sold as quaternary ammonium salt disinfectants, one product may have 9.28% active ingredient, while the other may have 23.08% active ingredient. The percentage of active ingredient can affect how device 800 determines whether the disinfectant solution is within the desired threshold. Therefore, device 800 may need to know specifically the characteristics of the product being used. Input device 829 can be used as described above to inform device 800 what the product is (e.g., scanning a barcode to inform device 800 of the product's manufacturer). Memory 825 can hold information related to specific disinfectant compounds from different manufacturers, allowing device 800 to access information about the compound and utilize it in programming program 826. Alternatively or alternatively, device 800 may utilize network 817 to retrieve information about a specific disinfectant compound for use with programming program 826.

[0067] Finally, the power supply section 830 may include one or more batteries for powering the device 800. As described above, the power supply section 830 may alternatively or additionally be provided as an internal electrochemical source, a power interface, and / or any other means for powering the system 800.

[0068] The monitor indicator system 800 can be implemented in a single device, i.e., the sensor section 810, the control indicator section 820, and the power supply section 830 are all arranged in and / or on a single housing. Therefore, the monitor indicator system 800 can be used as a comprehensive device that performs water analysis on a clean water sample and monitors the concentration of the disinfectant solution once a disinfectant compound is added to the water, without removing the device from the water or requiring user adjustment. Of course, the device 800 can be removed from the clean water before being placed in the disinfectant solution. The device 800 can be designed to float in the water / disinfectant solution. However, in alternative embodiments, the device 800 can be implemented as a clip (e.g., clipped to the side of a container), a sticker (e.g., as described above), or any other instrument that allows the device 800 to operate according to the description provided herein.

[0069] The general operation of the monitor indicator device and system 800 will now be described with reference to the foregoing figures and descriptions. System 800 begins operation: Programming program 826 runs a self-diagnostic program to check the status of the various sensors 811, 812, and 813. Once sensors 811, 812, and 813 are confirmed to be operational, the analog sensing circuitry associated with the device used to determine concentration can be calibrated using a test fixture to generate offset and gain correction factors to reduce differences between devices. While the initial self-diagnostic program is running, it can be powered via a wired power supply, but other power sources can be used alternatively.

[0070] Once the initial self-diagnostic calibration is complete, a more permanent power source (e.g., one or more batteries 830) can be installed into device 800. Optionally, battery 830 can be installed before the initial self-diagnostic calibration step. In any case, processor 823 can initiate a second self-diagnostic procedure via programming program 826. Optionally, the circuit calibration procedure can be skipped. Device 800 can then enter sleep mode.

[0071] In sleep mode, device 800 can operate at low power with reduced capacity. Device 800 can be programmed to operate in sleep mode for a predetermined period of time (e.g., 10 minutes, 30 minutes, 1 hour, 2 hours, 1 day, etc.), which allows device 800 to be packaged in a light-proof package so that device 800 is not prematurely awakened from sleep mode.

[0072] Once device 800 is in its package and the predetermined sleep mode period has expired, device 800 enters a standby state. In the standby state, device 800 remains in a low-power state. One or more light sensors may include an interrupt function configured to wake device 800 upon detecting light.

[0073] When device 800 wakes up from a standby state, it can enter a baseline wake-up state. In the baseline wake-up state, one or more lights within device 800 (e.g., one or more lights in indicator module 824) may flash in a specific pattern, providing an indication that device 800 is waiting to enter calibration mode. To enter calibration mode, probes 828 on device 800 (e.g., using a key, a specially designed holder, or other effective means) are short-circuited, which may require establishing contact between the probes for a period of time (e.g., 5 seconds, 10 seconds, 15 seconds, etc.). Device 800 can provide a signal (e.g., flashing lights) to alert the user that device 800 has successfully entered calibration mode, at which point device 800 begins the method for monitoring the concentration of the disinfectant solution. If device 800 does not enter calibration mode within a predetermined time period (e.g., 5 minutes, 10 minutes, 15 minutes, etc.), device 800 may return to a standby or semi-standby state to avoid wasting battery power.

[0074] Figure 10 A method for monitoring the concentration of a disinfectant solution according to an embodiment of the present invention is illustrated. The method begins at step 1002, wherein (after short-circuiting the probe as described above) device 800 is in calibration mode. In step 1002, device 800 is placed in clean water, and processor 823 determines, via sensors 811, 812, 813 and programming program 826, whether device 800 is in clean tap water. In step 1004, the temperature of device 800 stabilizes (e.g., the temperature of device 800 reaches equilibrium with the water temperature). This waiting time can be pre-programmed, or device 800 can automatically determine that the temperature has stabilized (e.g., via a series of temperature measurements). Typically, concurrently with step 1004, in step 1006, device 800 can activate a lifetime clock via programming program 826. The process then proceeds to step 1008.

[0075] In step 1008, device 800 performs water analysis via sensors 811-813. For water analysis, sensors 811-813 can perform one or more measurements on the water, including but not limited to pH, TDS, dissolved oxygen, chlorine concentration, alkalinity, and / or hardness. It should be understood that if it is desired to determine TDS as part of the water analysis, a conventionally understood TDS meter can be incorporated into device 800 and utilized accordingly. Alternatively, TDS in water can be determined by measuring the electrical conductivity (EC) of the water and correlating EC with the TDS of the water sample. It is generally understood that EC and TDS can be linked according to the following equation:

[0076] TDS (mg / L) = k e ×EC(μS / cm) (1)

[0077] Where k e It is a proportionality constant (usually assumed to be 0.7 when EC is 75,000 μS / cm), and the water temperature is at or near room temperature (i.e., about 25°C or 77°F).

[0078] Optionally, the measurement obtained in step 1008 can be stored in memory 825. In step 1010, the analog sensing circuit performs a baseline resistance measurement, and this measurement can be stored in memory 825. In step 1012, the programming program 826 uses the baseline resistance measurement to calculate the offset curve of the water sample. Then, in step 1014, the programming program 826 can activate the indicator module 824 to cause one or more lights to flash, for example, according to a pattern, thereby alerting the user that the baseline measurement is complete. Then, in step 1016, the device 800 transitions from calibration mode to operating mode.

[0079] Next, in step 1018, device 800 determines whether it is floating in the liquid (e.g., via sensor readings). If device 800 determines that it is not floating in the liquid, the process proceeds to step 1020. In step 1020, programming program 826 can cause device 800 to enter a low-power standby state. In the low-power standby state, programming program 826 can cause one or more lights to flash and / or cause one or more sensors 811, 813, 814 to take readings according to a preset schedule (e.g., every 1 second, 2 seconds, 5 seconds, 10 seconds, 20 seconds, 30 seconds, etc.). If device 800 receives a calibration signal (e.g., a probe is short-circuited), the process returns to step 1002. However, if device 800 detects that it is in the liquid, the process proceeds to step 1022. If device 800 determines in step 1018 that it is floating in the liquid, the process proceeds directly to step 1022.

[0080] In step 1022, programming program 826 causes the analog sensing circuit to test the resistance of the fluid. The resistance can be obtained at predetermined time intervals (e.g., every 1 second, 2 seconds, 5 seconds, 10 seconds, 20 seconds, 30 seconds, etc.). Using the resistance measurement, programming program 826 calculates the concentration of the solution in step 1024. The calculation of the solution concentration takes into account measurements and / or determinations made during calibration mode, namely water temperature, pH, TDS, hardness, baseline offset, and / or battery voltage. This ensures that the concentration is as accurate as possible. The process then proceeds to step 1026.

[0081] In step 1026, the programming program 826 compares the calculated concentration with a threshold (e.g., a threshold stored in memory 825). In step 1028, the programming program 826 activates the indicator module 824. If the programming program 826 determines that the solution concentration is below a low threshold, the programming program 826 may cause one or more lights (e.g., lights in the indicator module 824) to flash a specific color (e.g., red). If the programming program 826 determines that the solution concentration is between a low threshold and a high threshold, the programming program 826 may cause one or more lights (e.g., lights in the indicator module 824) to flash a specific color (e.g., green). And if the programming program 826 determines that the solution concentration is above a high threshold, the programming program 826 may cause one or more lights (e.g., lights in the indicator module 824) to flash a specific color (e.g., yellow). Of course, individual lights may exist, and the programming program 826 may activate the correct light depending on the determination result. Furthermore, device 800 can be dedicated to a specific disinfectant (e.g., a quaternary ammonium salt), such that the threshold stored in memory 825 is dedicated to and limited to that substance. In other embodiments, multiple thresholds can be stored in memory 825, and a user can activate device 800 based on a specific disinfectant, causing program 826 to compare the calculated concentration with the correct threshold. Steps 1022 to 1028 can be repeated any number of times, at which point the process proceeds to step 1030.

[0082] In step 1030, device 800 determines when it has been removed from the fluid (e.g., via sensor readings). The process then returns to step 1020 and can be repeated as described above.

[0083] Next, in step 1032, the programmer 826 determines whether the lifespan counter equals the end-of-life count (e.g., stored in memory 825). The end-of-life count can be equal to, for example, 1 day, 10 days, 100 days, 1 year, 5 years, etc. If the lifespan counter equals the end-of-life count, the process then proceeds to step 1034, where the sensing operation is terminated. The programmer 826 can cause a light (e.g., a light in the indicator module 824) to flash periodically (e.g., red and yellow) until the battery voltage drops below an operating threshold, at which point all operation can be stopped. The process is then complete, and a new device 800 can be started again.

[0084] Whenever device 800 determines that the probe pin is short-circuited, the process returns to step 1002, and device 800 re-enters calibration mode.

[0085] Example

[0086] Active chlorine is difficult to measure at high levels (e.g., greater than 50 ppm). Test strips are known to be inaccurate, and alternative methods for monitoring chlorine levels (such as ion-selective electrodes) are expensive and susceptible to errors caused by contamination. An experiment was designed to test the level of active chlorine in a solution containing chlorine bleach from sodium hypochlorite solution or an organic chlorine source (e.g., sodium dichloroisocyanurate). Hypochlorite is a strong oxidizing agent; therefore, the electrical properties of the solution were investigated.

[0087] The electrodes (Cu cathode, Zn anode) were placed in a disinfectant solution containing an active chlorine source. The theoretical potential of the Cu / Zn electrode pair is 1.10 volt direct current (VDC). In the solution, the voltage measured by the electrodes was 0.95 volt direct current (VDC), and the current was approximately 15-20 mAh / s. In the absence of an active chlorine source (such as sodium dichloroisocyanurate), the measured voltage of this solution was roughly the same as that of the solution with an active chlorine source; however, the resulting current was significantly lower, measured to be less than 2 mAh / s. The low current produced in the inactive chlorine solution is likely due to the reaction of the Zn anode with the alkaline solution, which may form zinc hydroxide. In the active chlorine solution, the higher level of current measured is thought to be due to the oxidation of the zinc anode by sodium hypochlorite. Although the concentration of sodium hypochlorite was not specifically measured, the current produced due to the oxidation of Zn is proportional to the hypochlorite concentration. Similarly, the amount of current produced is proportional to the surface area of ​​the anode.

[0088] Several experiments were conducted with different solution compositions. Distilled water with a pH between 6.2 and 6.8 was used in all measurements. Measurements were performed at room temperature, ranging from approximately 18.5°C to 19.5°C. The measurement voltage for distilled water ranged from 0.85 VDC to 0.9 VDC, with no measuring current. The electrode surface area was approximately 6 square inches. The base solution was prepared by... A suitable disinfectant solution was prepared, containing all disinfectant components except sodium dichloroisocyanurate. Sodium dichloroisocyanurate was purchased from Purdy and added to the test solution. The pH of the alkaline solution was between 10.5 and 11.0. Upon addition of the chlorine source, the pH of the solution decreased by approximately 1 / 2 to 1 pH unit.

[0089] Without a chlorine source, the pH of the disinfectant solution is approximately 11.0. The measured voltage is 0.95 VDC and the measured current is 0.5 mAmp to 1.5 mAmp. With a chlorine source, the pH of the disinfectant solution is 10.5, the measured voltage is 0.94 VDC, and the measured current is 18 mAmp ± 2 mAmp. The measured current was observed to be somewhat unstable unless the solution was stirred.

[0090] Adding a chlorine source to an alkaline solution produced a significant change in the measured current, which was proportional to the amount of chlorine source added. In several examples, the measured current was observed to almost double when the amount of chlorine was doubled.

[0091] Electrodes may undergo polarization over time. In a static, unstirred system, a layer of charged ions can accumulate at the electrode surface. This can inhibit reactant diffusion, thus slowing the reaction at the electrode surface and leading to inaccurate readings. To create a dynamic system, a magnetic stirrer is used to maintain agitation in the system, which appears to minimize polarization effects and promote stable current readings.

[0092] In addition to polarization, reaction products (e.g., ZnO) may contaminate the surface of the anode (Zn). Contamination has been observed as a white precipitate on the anode surface.

[0093] Hypochlorite in the solution is consumed at the anode. This reaction generates a current used to determine the hypochlorite concentration. It is generally believed that the consumed hypochlorite is insufficient to interfere with the overall performance of the system. This is because an equilibrium exists between the parent compound (sodium dichloroisocyanurate) and various hypochlorite compounds in the system. As hypochlorite is consumed at the anode, sodium dichloroisocyanurate “releases” more hypochlorite. This equilibrium helps maintain the hypochlorite level in the solution.

[0094] Anode surface contamination can lead to lower current readings. Contamination can be due to the accumulation of food residues (e.g., fats, oils, particulate matter) in the solution. It is generally believed that when such accumulation is significant enough to affect the reading, users often change the solution based on the turbidity of the water, regardless of the reading.

[0095] Based on the observed results, it can be determined that the concentration of hypochlorite in the solution can be monitored indirectly via the current generated by the galvanic cell.

[0096] Figure 11a and Figure 11b Results of different experiments conducted at multiple locations are presented, demonstrating the effects of water hardness and temperature on concentration. All experiments were conducted under similar conditions, at room temperature (21.1°C / 70°F), and the actual PPM was determined by titration. In each case, the disinfectant used was a quaternary ammonium salt. The counts listed in each table correspond to the electronic pulses used to measure resistance. These counts were determined by an analog-to-digital converter and used to determine the concentration of the disinfectant solution. These counts depend on other information, including TDS and temperature. In other words, if the program 826 knows the baseline TDS and temperature of the water source without disinfectant solution, it can determine a particular count to reflect a particular solution concentration.

[0097] The device temperature (Device Temp) corresponds to the device's temperature of 800°C, and the thermometer temperature (Thermo Temp) corresponds to the water temperature as determined by the thermometer. When the device is placed in water, its temperature will eventually equalize with the water temperature. Figure 11a and Figure 11b In the experiment shown in the figure, the count is related to the thermometer temperature because this is a more accurate reading of the water temperature when taking the reading.

[0098] Temperature curves can be plotted using the thermometer temperatures and counts recorded for each of the Cold Test, Warm Test, and Hot Test, and the program can use these temperature curves to inform concentration calculations.

[0099] exist Figure 11a and Figure 11b The experiments shown in the table help inform the programming program 826 about concentration calculations. The data is provided to the programming program 826 to run the algorithm, allowing the device to determine the concentration. For example, in experiment LS#2, the device determines a count of 1998. Titration determines the actual PPM of the disinfectant in the solution to be 414 PPM (even though the amount of disinfectant used according to the packaging instructions should be closer to 450 PPM). Therefore, the data indicates that at a temperature of 19.4°C and a water hardness level of 28, a count of 1998 represents a concentration of 414 PPM. The device 800 can then, via the programming program 826, convert this count to represent approximately 414 PPM of disinfectant in the solution at similar temperatures and water hardness.

[0100] In experiment FGS#4, the water hardness level was measured at 203, which is significantly different from the water hardness level in experiment LS#2. It can be seen that the counts measured in experiment FGS#4 are significantly different from those measured in experiment LS#2. Therefore, the data indicate that at a temperature of 19.8°C and a water hardness level of 203, count 582 represents a concentration of 397.3 PPM. Similarly, device 800 is configured such that programming program 826 can convert these counts obtained at similar temperatures and water hardness levels into a concentration representing approximately 400 PPM.

[0101] Figure 12This is a graph showing the ADC count and conductivity (μS) versus the concentration of the disinfectant solution (in this case, quaternary ammonia compound (QAC)) based on six experiments. In each case, the count decreases as the concentration increases. For example, the distilled water ADC experiment shows that when the concentration is 0 PPM (e.g., no disinfectant compound in the water), the count is measured to be approximately 2900. At a concentration of approximately 425 PPM of QAC, the count is measured to be approximately 1400. Conversely, the EC of the solution increases as the concentration increases. Referring again to the distilled water experiment, the line labeled Distilled Water EC shows that when the concentration is 0 PPM (e.g., no QAC in the water), the EC is measured to be zero, as expected, indicating the absence of organic and inorganic substances in the distilled water. As the concentration of QAC in the water increases, the EC of the solution also increases due to the presence of QAC in the water. Essentially, the count is a function of the concentration of QAC in the water. However, if it stopped there, the count would be the same regardless of the water source. This is clearly not the case, because for the line labeled Tap Water 2ADC (Tap 2ADC), the counts measured at 0 concentration (approximately 1500) are significantly lower than those for Distilled Water ADC. Therefore, these counts are also affected by the water characteristics of the source (e.g., pH, TDS, hardness, alkalinity, temperature, chlorine content, dissolved oxygen content, etc.). It should be noted that the data points included in Tap Water 2ADC (Tap 2ADC) and Tap Water 2EC (Tap2EC) are taken from the same water source at a set temperature. Based on this information, program 826 can make a concentration determination, where the concentration is derived from solution resistance measurements, thereby compensating for temperature and baseline TDS.

[0102] Many different arrangements of the various components depicted, and those not shown, are possible without departing from the spirit and scope of this disclosure. Embodiments of the invention have been described in an illustrative rather than limiting manner. Alternative embodiments without departing from their scope will become apparent to those skilled in the art. Those skilled in the art can develop alternatives to implement the foregoing improvements without departing from the scope of this disclosure.

[0103] It will be understood that certain features and sub-combinations are practical and can be employed without reference to other features and sub-combinations, and are contemplated within the scope of the claims. Unless otherwise specified, not all steps listed in the different figures need to be performed in the specific order described.

Claims

1. A device for monitoring the concentration of a disinfectant compound in water, comprising: Power module; The sensor section includes multiple sensors; as well as The control indication section includes: A processor operatively communicable to an instruction module and a non-transitory computer memory having a programming program that, when executed by the processor, performs the following steps: Perform a calibration phase, which includes: The temperature of a water sample from a water source is determined via at least one of the plurality of sensors, the water sample being free of disinfectant compounds; The characteristics of the water sample are measured via at least one of the plurality of sensors, wherein the characteristics of the water sample are selected from at least one of the following: total dissolved solids, conductivity, alkalinity, chlorine content, dissolved oxygen content, pH, and hardness; and The baseline resistance of the water sample is measured via at least one of the plurality of sensors; and The operation phase includes: Determine the resistance of a disinfectant solution, wherein the disinfectant solution comprises water from the water source and at least one disinfectant compound; The concentration of the disinfectant solution is calculated, wherein the concentration is derived from the resistance measurement of the disinfectant solution based on the temperature of the water sample, the characteristics of the water sample, and the baseline resistance of the water sample. The calculated concentration is compared with a predetermined threshold concentration stored in the memory; and The indicator module is activated based on a comparison between the calculated concentration and the predetermined threshold concentration.

2. The device according to claim 1, wherein, The plurality of sensors include at least a temperature sensor and a conductivity sensor.

3. The device according to claim 2, wherein, The indicator module includes at least one light.

4. The device according to claim 1, wherein, The steps for activating the indicator module include: (i) If the calculated concentration is lower than the lower threshold of the predetermined threshold concentration, then the first indicator is activated; (ii) If the calculated concentration is between the low and high thresholds of the predetermined threshold concentration, then the second indicator is activated; and (iii) If the calculated concentration is higher than the high threshold of the predetermined threshold concentration, then the third indicator is activated.

5. The device according to claim 1, wherein, The at least one disinfectant compound includes the quaternary ammonium compound QAC.

6. The device according to claim 1, wherein, The calibration phase further includes activating the lifetime clock, and the operation phase further includes determining whether the lifetime clock is equal to a predetermined lifetime end count.

7. The device according to claim 6, wherein, Repeat the operation phase until the lifetime clock equals the predetermined lifetime end count.

8. The device according to claim 1, wherein, If a probe pin on the device is short-circuited, the device returns to the calibration phase.

9. A method for monitoring the concentration of a disinfectant in a solution, comprising: A device is provided for monitoring the concentration of a disinfectant solution, the device comprising multiple sensors; The calibration phase is performed via the device, and the calibration phase includes: The device is placed in water that contains no disinfectant, wherein the device: Determine the temperature of the water; Water analysis is performed to determine the properties of the water, wherein the properties are selected from at least one of the following: total dissolved solids, conductivity, alkalinity, chlorine content, dissolved oxygen content, pH, and hardness; and The baseline resistance of the water is measured via at least one of the plurality of sensors; and Add a disinfecting compound to the water; and The operation phase is performed via the device, wherein the device: Determine the electrical resistance of the water containing the disinfectant compound; Calculate the concentration of the disinfectant compound in the water, wherein the concentration is derived from the resistance measurement of the disinfectant solution based on the temperature of the water, the properties of the water, and the baseline resistance; Compare the calculated concentration with the predetermined threshold concentration; and The device's indicator module is activated based on a comparison of the calculated concentration with the predetermined threshold concentration.

10. The method according to claim 9, wherein, Activating the indicator module includes: (i) If the calculated concentration is lower than the lower threshold of the predetermined threshold concentration, then the first indicator is activated; (ii) If the calculated concentration is between the low and high thresholds of the predetermined threshold concentration, then the second indicator is activated; and (iii) If the calculated concentration is higher than the high threshold of the predetermined threshold concentration, then the third indicator is activated.

11. The method according to claim 10, wherein, The first indicator, the second indicator, and the third indicator are implemented in a single indicator source.

12. The method according to claim 11, wherein, The operation phases are repeated according to a predetermined schedule.

13. The method according to claim 11, wherein, During the operation phase, the device further determines whether it is floating in the liquid.

14. The method according to claim 13, wherein, Repeat the above operation phases until the device determines that it is not floating in the liquid.

15. A method for monitoring the concentration of a disinfecting compound in a solution, comprising: A device is provided for monitoring the concentration of a disinfectant solution, the device comprising: Power module; The sensor section includes multiple sensors; and Control indication section; Perform a calibration phase, which includes: The device is placed in water that contains no disinfectant, wherein the device: Determine the temperature of the water; The conductivity of the water is measured via at least one of the plurality of sensors; and The baseline resistance of the water is measured via at least one of the plurality of sensors; and Add at least one disinfecting compound to the water; and During the execution operation phase, the device: Determine the resistance of the water containing the at least one disinfecting compound; Calculate the concentration of the at least one disinfectant compound in the water, wherein the concentration is derived from resistance measurements of the disinfectant solution based on the temperature of the water, the conductivity of the water, and the baseline resistance of the water; Compare the calculated concentration with the predetermined threshold concentration; and The indicator module is activated based on a comparison between the calculated concentration and the predetermined threshold concentration.

16. The method of claim 15, wherein: During the calibration phase, the device further determines the hardness level of the water; and During the operation phase, the calculated concentration is further based on the water hardness level.

17. The method of claim 15, wherein: During the calibration phase, the device further determines the pH of the water; and During the operation phase, the calculated concentration is further based on the pH of the water.

18. The method according to claim 15, wherein, The operation phases are repeated according to a predetermined schedule.

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