191 results about "PH meter" patented technology

The invention discloses an automatic cleaning mechanism of a pH meter, comprising a connecting rod, wherein a pH electrode is arranged at the bottom of the connecting rod; an electrode signal wire passes through the connecting rod and is accessed into a special instrument; an electrode sheathing is connected with the connecting rod; and a sealing block is connected with the electrode sheathing. Through the action of an actuating mechanism, a pH electrode connected with the connecting rod is ascended and descended so as to achieve the purpose of separating the pH electrode from the liquid level for cleaning and maintaining or sinking into the liquid level to measure a measured medium. The special instrument can display a measurement result and control an electromagnetic valve and a water valve so as to realize the lifting control and the cleaning control of the pH electrode. The invention has the advantages of good cleaning and maintaining effects on the pH electrode, simple structure, safety, reliability, wide application range, service life extension of the pH electrode, and the like.

The invention relates to a measure apparatus of a flue gas desulphurization absorbing tower, a slurry pH meter and a densitometer by using a wet method and its method, which belongs to the field of desulphurization with environmental protection. The measure apparatus comprises a desulphurization island absorbing tower, a pH meter container, the pH meter, the densitometer and a slurry main pipe in the desulphurization island absorbing tower. According to the invention, the measure method employs an automatic control apparatus, so that the instrument on-line rate and the accuracy are raised, the workload for on-site apparatus maintenance can be minimized and the energy consumption is reduced.

The invention discloses a method for online measurement of pH of cigarette main stream smoke in real time. The method is characterized by comprising the following steps: directly placing a reformed pH electrode into the smoke passage of a cigarette sucking machine; starting the cigarette sucking machine to suck the cigarette, wherein when the main stream smoke passes by the surface of the electrode, the acid and alkaline chemical substances in the main stream smoke react with a buffering solution on the pH electrode; recording the reading of a pH meter, and measuring the pH of the cigarette main stream smoke in real time. The method disclosed by the invention can be used for accurately measuring the pH of the cigarette main stream smoke and directly and comprehensively reflecting the acid and alkaline indexes of the cigarette main stream smoke, and compared with the prior art, the method has the characteristics of simple operation, high sensitivity and reliable result, and a novel method for measuring pH of cigarette main stream smoke is created.

The invention discloses a supervisory control method for producing trehalose by a double-enzyme method. The supervisory control method comprises the following steps of firstly mounting a near-infrared real-time monitoring and control system; collecting starch liquefied liquid, measuring a DE (Dextrose Equivalent) value by using a Fehling's reagent method, collecting catalysis liquid, measuring a pH (potential of Hydrogen) value by using a pH meter, measuring the content of the trehalose by using high performance liquid chromatography, associating with a correspondingly collected near-infrared spectrum, establishing a quantitative model of changes of the DE value, the content of the trehalose and the pH value in a production process, and correcting; afterwards, quickly detecting the DE value, the content of the trehalose and the pH value in the production process by utilizing the established model, and stabilizing the DE value to be 8 to 20 and stabilizing the pH value to be in the range, in which the activity of malto-oligosaccharide based trehalose synthase-MTSase and malto-oligosaccharide based trehalose hydrolase-MTHase is optimal, by utilizing a control system. The method can be used for monitoring the DE value of starch liquid and the content of the trehalose in reaction liquid in real time and can also used for automatically controlling the change of the pH value and the content of the trehalose and the result is accurate and reliable.

A waterproof pH meter includes a main unit, a probe, which includes a probe electrode and a signal processing circuit, and a waterproof signal transmission line electrically coupled between a main circuit in the main unit and the signal processing circuit of the probe. When measuring a solution, a potential signal generated by the probe electrode is amplified by the signal processing circuit and then transmitted to the main unit through the waterproof signal transmission line for reading by the user. As the design has a better capacity in bearing noise interference, the signal transmission line can be selected from a regular waterproof cable instead of a BNC material.

The embodiment of the invention discloses a pH value measuring method. The pH value measuring method comprises the following steps: simultaneously measuring pH values in three positions in a reaction kettle; judging whether a first pH value is unavailable according to the difference between the first pH value and a second pH value as well as the difference between the first pH value and a third pH value, wherein when the first pH value is available, the average value of the three pH values is taken as the pH value of a solution in the reaction kettle, and when the first pH value is not available, the average value of the second pH value and the third pH value is taken as the pH value of the solution in the reaction kettle. According to the pH value measuring method provided by the embodiment of the invention, when a certain pH meter malfunctions, the fault can be timely found, and the pH value measured by the malfunctioned pH meter is removed when the pH value of the solution in the reaction kettle is calculated, so that the measurement accuracy of the pH value of the solution in the reaction kettle is improved, and the control errors of the pH value of the solution are reduced in a production process. The application further discloses a pH value measuring device.

The invention relates to a device for simulating motion transfer of charcoal in a soil system, which comprises an original pool, a water pump, a pH equalizing tank, a stirring device, a simulated soil column and an automatic part collector. The original pool comprises a solution injection bottle and a conduit; the pH equalizing tank comprises a pH electrode, a pH meter, charcoal particles; the stirring device comprises a magneton and the stirring device; valves are arranged at upper and lower ends of the simulated soil column, an air outlet is arranged at top, a silica gel pad is arranged in flange plates at upper and lower ends, the porous filter panels are respectively placed at upper and lower position of a filling medium; the automatic part collector comprises an outlet pipe, a timing rotating disk and a liquid outlet collection container; a water inlet of the pH equalizing tank is connected to the original pool, the water inlet of the stirring device is connected to the water outlet of the pH equalizing tank, the water inlet of the simulated soil column is connected to the water outlet of the stirring device, and the water outlet of the simulated soil column is connected to the automatic part collector. The device for simulating motion transfer of charcoal enables real-time acquisition of distribution condition of charcoal concentration on time and space as well as real-time change of output liquid volume, and has the characteristics of high automation degree, high accuracy, less volume of experiment apparatus, less interference factor and easily controlled condition.

Voltammetric sensors prepared from composite materials and optionally using microfabrication techniques enable detection of analyte in sample volumes under ten microliters.

The invention discloses a rotaxane molecular machine of naphthalimide crown ether and a pH meter based on the molecular machine. Structural formula of the molecular machine is represented as a formula (I) as shown in the specification. The pH meter includes a gold electrode and the rotaxane molecular machine of the naphthalimide crown ether which is adsorbed on the surface of the gold electrode to form a self-assembled monolayer. The synthesized rotaxane molecular machine of the naphthalimide crown ether is bonded with the gold electrode through a disulfide bond, to result in transfer of the molecular machine and charges on the gold electrode in a process of adding acid or alkali, thus achieving online rapid monitoring of pH value; the molecular machine can avoid accumulation of waste generated from the whole monitoring process on the monolayer, thus enhancing detection limit, sensitivity and fatigue resistance.

The invention discloses a novel pH (Potential of Hydrogen) meter which comprises a sensor, wherein a bracket is arranged on the sensor, and connected with a measuring electrode; an object placing platform, an LED (Light-emitting Diode) display screen and a function selection area are arranged on the sensor; the object placing platform is circular; a weighing switching button and a temperature adjustment and control area are arranged on the function selection area; and a switch is arranged on one side of the temperature adjustment and control area. The novel pH meter is simple in structure, convenient to use, exquisite in appearance, long in service life, simple and direct to operate, and convenient to popularize and use, and is applicable to different scopes; an electromagnetic oven is endowed with a new function, so that a cooking mode can be adjusted more quickly, conveniently and freely during cooking; and a timing module is adopted, so that the pH meter can be used more friendly.

The invention discloses a device for measuring the density and the pH value of slurry. The device comprises an air sampling pipe component, a densitometer, a first pH meter and a second pH meter, wherein the air sampling pipe component comprises a first branch pipe, a second branch pipe, a third branch pipe, a fourth branch pipe and a fifth branch pipe; the lower end of the first branch pipe is connected with the lower end of an absorption tower; the first pH meter is inserted into the first branch pipe; the second branch pipe is horizontally communicated with the first branch pipe; the free end of the second branch pipe is connected with a flushing water pipe; the upper end and lower end of the third branch pipe are respectively communicated with the lower ends of the first branch pipe and the densitometer; the upper end of the densitometer is communicated with the lower end of the fourth branch pipe; the second pH meter is inserted into the fourth branch pipe; the fifth branch pipe is vertically communicated with the fourth branch pipe; and the central lines of the third branch pipe, the fourth branch pipe and the densitometer are positioned on the same straight line and are parallel to the wall of the absorption tower. The device for measuring the density and the pH value of slurry can prolong the service life of the densitometer and the pH meters and reduce the maintenance workload of field equipment.

The invention relates to a fast inspection device of the effluent quality of an immersed type membrane pond, relating to an inspection device and solving the problem that the traditional water quality inspection device greatly increases the cost of the membrane pond by installing a set of water quality monitoring equipment in each membrane pond. A plurality of connecting membrane pond branch pipelines are all communicated with one of two main pipelines; each connecting membrane pond branch pipeline is provided with an automatic valve, the two main pipelines are mutually communicated through a connecting pipeline, a suction pump is arranged on the connecting pipeline, a turbidity meter, a pH meter, a grain counter and a residual chlorine detector are respectively communicated with the other main pipeline through inspection pipelines, each automatic valve is connected with an automatic control device through a lead, and the turbidity meter, the pH meter, the grain counter and the residual chlorine detector are respectively connected with the automatic control device through leads. The fast inspection device greatly reduces the cost of the membrane pond and also has the advantages of simple structure, convenient operation, and the like.

The invention discloses a method for absorbing and fixing carbon dioxide by using spirulina, and belongs to the technical field of biology. According to the method, sealed photobioreactors are connected in series. Each photobioreactor is connected to a pH meter and a peristaltic pump, wherein a pH probe of the pH meter is soaked in a spirulina liquid contained in the photobioreactor and used for continuously detecting the pH value of the spirulina liquid, and the other end of the pH meter is connected to a switch of the peristaltic pump through a signal line. One end of the peristaltic pump isconnected to an alkaline solution storage container via a silica gel pipe, and the other end enters the spirulina liquid located inside the photobioreactor via a silica gel pipe. The peristaltic pumpcan convey an alkaline solution from the storage container to the photobioreactor, so that the pH value of the spirulina liquid is raised. When the pH value of the spirulina liquid reaches 11.0 or higher, the pH meter controls the switch of the peristaltic pump to be automatically off, so that the peristaltic pump stops conveying the alkaline solution from the storage container to the photobioreactor. According to the method, a large amount of carbon dioxide in the air can be absorbed and fixed. The method is also suitable for other spirulina varieties and basophilia microalgae varieties.

The invention discloses a pH meter for water quality detection, which comprises a main machine, a metering electrode, a temperature probe, an electric wire, and a calibration potentiometer. The metering electrode and the temperature probe are electrically connected to the main machine through the electric wire; the calibration potentiometer is installed in the main machine; a groove is formed in the metering electrode; a rubber sheath is installed on the upper end of the metering electrode; a plastic shell is arranged on the lower end of the metering electrode; a liquid crystal display screen is installed on the main machine; a transversal rod is installed on one side of the main machine, where two vertical rods are fixed to the middle of the transversal rod; a sleeve ring is arranged on the end of the transversal rod, wherein the diameter of the sleeve ring is larger than the diameter of the metering electrode and is smaller than the diameter of the plastic shell. The pH meter is convenient to use, has compact structure and is high in measurement precision.

The invention discloses a method and system for directly recycling red mud alkali. The method comprises the following steps that: (1) red mud is leached with alkaline circulating water as leaching water, and the pH or conductivity of a leacheate is detected; (2) evaporation and concentration are performed when the pH or concentration of the leacheate is relatively high; (3) when the pH or concentration of the leachate is small, the leachate is used as alkaline circulating water, and fresh water is used as leaching water to leach the red mud; and (4) leaching is stopped when the pH value of theleachate reaches a set value. The system comprises a leaching pool; leaching spray heads are distributed at the top of the leaching pool; each spray head is connected with an alkaline circulating water storage tank and a condensate water storage tank through liquid conveying pipes; a pH meter is arranged at the liquid outlet of the leaching pool and is connected with a high-pH leachate storage tank and the alkaline circulating water storage tank through liquid inlet valves; the liquid outlet of the high-pH leachate storage tank is connected with an MVR evaporator; and the MVR evaporator is connected with a condensate water storage tank and a second evaporator. Additional components are not needed. The method and system have the advantages of simple treatment process, high treatment efficiency, good effect, and low cost.

The invention discloses an on-line pH (Potential of Hydrogen) value sampling measurement device for a slurry material, belonging to the technical field of sampling measurement. A pH meter is fixedly arranged in a measuring cavity through a fixed pin and is connected with an intelligent instrument; a filtrate pH signal measured by the pH meter is converted into an electric signal, and the electric signal is amplified and output to the intelligent instrument to display a pH value; an opening in the lower part of the measuring cavity is fixed with a keel frame through a fixed flange; a side wall of the keel frame is provided with a hole; filter cloth is fixedly arranged outside the keel frame through a fixing component; the fixing component comprises a fixing forage and a fastening pin; an electric vacuum extraction valve and an electric compressed air valve are arranged on the measuring cavity; and opening and closing of the electric vacuum extraction valve and the electric compressed air valve are controlled by an intelligent time relay. After long-term use, the problem of scaling is not caused on an electrode head of the pH meter, the measuring accuracy of the pH meter is kept at a higher level all the time, the service life of the pH meter is long, and the entire device can operate stably for a long time.

An apparatus has a platinum group metal carrying resin column provided in a supply line of ultrapure water, and has a pH adjuster injection device and a redox potential adjuster injection device provided in a later stage thereof. The apparatus has a membrane-type deaeration apparatus and a gas dissolving membrane apparatus sequentially provided in a later stage of the devices, and a discharge line communicates with the gas dissolving membrane apparatus. A pH meter and an ORP meter are each provided at some midpoint in the discharge line, and the pH meter and the ORP meter are connected to a control device. Then, the control device controls the amount of adjusters to be injected from the pH adjuster injection device and the redox potential adjuster injection device, on the basis of the measurement results of the pH meter and the ORP meter.

The invention discloses an anti-scaling system and method for a wet deslagging system of a thermal power plant. The anti-scaling system comprises a controller, a fine treatment regeneration system, afirst online pH meter, a fine treatment regeneration acidic wastewater delivery valve, a fine treatment regeneration alkaline wastewater delivery valve, a chemical regeneration system, a second onlinepH meter, a chemical regeneration acidic wastewater delivery valve, a chemical regeneration alkaline wastewater delivery valve, a desulfurization system, a slag removal system water replenishing tank, a slag removal system water replenishing tank delivery pump, a slag conveyor, a boiler, a slag overflow tank, a concentration tank, a clean water tank and a third online pH meter, According to the system and the method, the scaling problem of pipelines and equipment of the wet deslagging system can be prevented and the disposal problem of regenerated wastewater of the whole plant can be solved and the cost is low.

The invention relates to a device for determining dissociation constant of weak electrolyte. The device consists of a pH meter, a magnetic stirrer, a titration cup, a liquid feed pump and a constant-temperature circulating bath, wherein the titration cup is a double-layer glass cup; a constant-temperature circulating water passage is formed between the inner layer and the outer layer of the glass cup, and is connected with a constant-temperature circulating device; the titration cup is placed on a box integrated with the magnetic stirrer and the pH value; and two feed pipes of the liquid feed pump extends into the titration cup, one for feeding a to-be-detected sample solution to the titration cup and the other one for adding a titrant into the titration cup slowly by adjusting flow rate of the liquid feed pump. The device provided by the invention can accurately, conveniently and rapidly determine dissociation constant of acidic or alkaline weak electrolyte solution, and can determine dissociation constants of a to-be-detected sample at different temperature by adjusting temperature of the constant-temperature circulating bath.

The invention discloses a spectrum-based cell culture suspension pH measuring method. An acid-base indicator which can change color with a pH value of a suspension is added in a cell culture suspension, then color of the cell suspension is measured by using transmitted spectrum, and the pH value of the suspension is determined. According to the method, the problem that an electrode type pH meter is not suitable for the pH value detection of the cell culture suspension is solved, the interference of the cell density on a pH measurement result also can be effectively eliminated, and the high-precision measurement of the pH value of the cell suspension is achieved.

The invention relates to a testing device of the desulphurization efficiency and a testing method thereof. The testing device comprises a buffering bottle, an SO2 absorbing bottle I, an absorbing system A and an absorbing system B. The testing method comprises the following steps of: adding alkaline solution with same volume V into all the SO2 absorbing bottles, introducing the same amount of SO2 gas to enable the absorbing system A to absorb and test PH values of testing liquid in all the SO2 absorbing bottles, and calculating the molar weight of the SO2 absorbed by the absorbing system A; and then introducing the same amount of SO2 gas to enable the absorbing system B to absorb and test PH values of testing liquid in all the SO2 absorbing bottles, calculating the molar weight of SO2 absorbed by the absorbing system B, and calculating the desulfurization efficiency. The testing device has the advantages that the structure is simple, and the operation is easy; the two absorbing systems are utilized for respectively absorbing the SO2 gas, the total amount of the absorbed SO2 and the amount of SO2 absorbed by limestone slurry are measured by a PH meter, the desulphurization efficiency of the limestone slurry is tested, the experimental data is accurate and reliable, the experimental steps are simplified, and the experimental cost is lowered.

The invention relates to the technical field of iron phosphate production, in particular to an automatic iron phosphate production device and a method thereof. The device comprises a phosphorus salt dissolving tank, an iron salt dissolving tank, a hydrogen peroxide metering tank, a reaction kettle provided with a first pH meter, a first filter press, a dispersion kettle, a primary aging kettle provided with a first thermometer, a secondary aging kettle provided with a second pH meter and a second thermometer, and a second filter press, and all processes of reaction, filtering and washing, aging, dispersing, drying and the like are controlled by a DCS control system, phosphorus and heat resources in the secondary washing liquid and the secondary mother liquid can be recycled, the technicalrequirements of a newly developed complicated iron phosphate synthesis process and energy conservation and consumption reduction can be met, automatic production of a new process and automatic monitoring of a production process can be realized, and reduction of the production cost and improvement of the production efficiency are facilitated.