Floating or submersible measuring and dosing device for a pool

Abstract

The invention relates to a floating and / or submersible measuring and dosing device for measuring and treating water in a swimming pool. The object of the present invention, to provide means by which high water quality in a swimming pool can be ensured even with highly fluctuating usage, without the need for extensive external piping and treatment systems, is achieved by a floating and / or submersible measuring and dosing device for measuring and treating water in a swimming pool. - Means for determining the water quality in the pool basin (10, 11), - at least one storage medium and one dosing medium for at least one water treatment substance (13, 14, 15, 16), - at least one control unit for controlling the at least one dosing agent (15, 16), preferably depending on the water quality in the pool basin and - Solved the means for powering the measuring and dosing device.

Description

[0001] The invention relates to a floating and / or submersible measuring and dosing device for measuring and chemically treating water in a swimming pool.

[0002] Pools and swimming pools can take on a wide variety of shapes and functions. Typical examples include whirlpools, swim spas, paddling pools, inflatable pools, frame pools, and pools with jet walls. The use of smaller pools, such as whirlpools or smaller pools with a counter-current system, known as swim spas, is becoming increasingly popular. They promote health and require little installation effort.

[0003] When hot tubs and swim spas are used, the water becomes contaminated with viruses, bacteria, and human dirt. Even in unused pools, the water quality changes due to incoming dust, particles, leaves, etc. Chemical reactions increase the water's pH level, rendering disinfection, often achieved through free chlorine, ineffective. This applies to larger pools, for example, those approximately 10 m² or larger. 3 Therefore, pool water is typically connected via piping to an externally located treatment plant, for example, in a pool house, in order to filter the water, adjust the pH value, and disinfect the pool water with the correct amount of disinfectant. For this purpose, the water is drawn from the pool basin through pipes, filtered, fed into the treatment plant, and then returned to the pool basin.

[0004] Smaller pools, such as whirlpools, swim spas, paddling pools, quick-up pools, frame pools, above-ground pools, inflatable pools, and blast-wall pools, lack these systems because the necessary piping for smaller volumes would be too complex. The aforementioned pools, on the other hand, often only have integrated filters and circulation systems that can mechanically filter residues from the water. For disinfection, the user must manually add water treatment products, also known as "water care products," to the water, which frequently leads to application errors. Often, excessive amounts of chlorine are used. Furthermore, the water quality changes even when the pool is not in use or with highly variable usage, and this can therefore lead to health problems. Maintaining the water quality of pools without a piped treatment system can therefore be a complex and time-consuming process.

[0005] The water treatment systems known from swimming pools, which include water quality control and treatment through the addition of pH-control agents and disinfectants, are maintenance-intensive and cannot be used without external inlet and outlet, i.e., external piping.

[0006] Floating probes are also known from the prior art; these measure all water parameters in a swimming pool and transmit the data to a treatment plant. However, the problematic dosing of water treatment agents in swimming pools without treatment plants connected via piping is not solved by these known probes.

[0007] Based on this state of the art, the object of the present invention is to provide means by which high water quality in a pool basin can be provided with minimal maintenance over a long period of time, even with highly fluctuating usage, without requiring extensive external piping and external treatment systems.

[0008] The aforementioned task is solved by a floating and / or submersible measuring and dosing device for measuring and treating water in a swimming pool basin with - Means for determining water quality in the pool basin, - at least one storage medium and one dosing medium for at least one water treatment substance, - at least one control unit for controlling the at least one dosing agent, preferably depending on the water quality in the pool basin and - Means for powering the measuring and dosing device.

[0009] Studies have shown that it is possible to ensure good water quality in a swimming pool even without an external treatment system by precisely adding water treatment substances via a floating and / or submersible measuring and dosing device. The measuring and dosing device according to the invention utilizes means for determining the water quality of the pool water in order to carry out the dosage of the water treatment substances, preferably based on the measured water quality. Means for determining water quality include all possible sensors or measuring cells that can measure water parameters important for the operation of swimming pools. These include, among others, means for measuring pH value, redox potential, chlorine content, cyanuric acid content, or alkalinity.The benefit of good water quality is also achieved when, for example, pool parameters are precisely calibrated, substances for water treatment are continuously released from the storage chemicals via dosing units. In this case, the water quality indicators can be used to issue warnings in case of poor water quality. By using dosing units that precisely dispense water treatment substances from the storage chemicals, overdosing, for example of disinfectants, can be largely prevented.

[0010] It has been found that the measuring and dosing device achieves sufficient distribution of the water treatment substances by floating or submerging in the pool during dosing from the stored substances using the dosing agents. Thanks to its power supply, the measuring and dosing device can remain in the pool for extended periods and can be removed, for example, when the pool is in use. The measuring and dosing device can be powered by rechargeable batteries or standard batteries. A wired DC power supply with a maximum voltage of, for example, 24 V is also conceivable. If means for inductive charging of rechargeable batteries are provided, the measuring and dosing device can, in principle, also be operated continuously, since the batteries can be charged even underwater.

[0011] By using the measuring and dosing device according to the invention, not only can the water's residence time in the pool be extended while maintaining consistent quality, thus reducing water consumption, but the combination of dosing agent and water quality determination agent also enables the efficient and waste-free use of water treatment substances, while reducing health risks. The water quality in the pool is maintained for a longer period, yet the pool can be used at any time. This also eliminates the need for external piping. The measuring and dosing device according to the invention is therefore particularly advantageous for all pools up to 10 m². 3This is advantageous because either an external water treatment system is undesirable or too costly to implement. Furthermore, it provides a simple way to consistently adjust the water quality in cases of highly variable pool usage, such as with a whirlpool.

[0012] Preferably, according to a first embodiment, they are used as a means for determining water quality - Means for determining the pH value of the water in the pool basin, provided as well as - Storage and dosing equipment for at least one disinfectant and - Storage and dosing equipment for at least one product for adjusting the pH value of the water in the pool basin.

[0013] The combination of storage and dosing units for at least one disinfectant and at least one pH-adjusting agent for the pool water allows for precise control of pool water quality with regard to hygiene, using the control unit to regulate the dosing agents. pH-lowering agents are preferably used here to enhance the effectiveness of the disinfectants. Disinfecting the pool water at a controlled pH is particularly easy when using an aqueous solution containing hypochlorous acid, sodium hypochlorite, and sodium chloride, without the need for further measurements. This design is therefore especially economical.

[0014] If, according to a further embodiment of the measuring and dosing device, additional means for determining the redox potential of the pool water are provided, an aqueous solution containing mixtures of chlorine(I), chlorine(II) oxides (ClO2), and sodium chloride can be used for disinfection, which is particularly effective. Such disinfection is frequently used in public swimming pools. The redox potential is defined as the ratio between the amount of oxidizing substances and the amount of reducing substances. The redox potential is expressed in mV and indicates whether the disinfectant, in this case chlorine, has sufficient disinfecting power (oxidizing capacity). For example, a redox potential of at least 750 mV is specified for the disinfection of public swimming pools. The oxidizing substances in the pool water are disinfectants, especially in the form of free chlorine.Contaminants in the pool water, for example from bathers, environmental factors such as dust, etc., typically increase the amount of reducing substances, causing the redox potential to decrease. As the redox potential decreases, the effectiveness of the disinfectant also diminishes.

[0015] In principle, with regard to the last-mentioned design of the measuring and dosing device, means for determining water quality can also be provided in the measuring and dosing device, which can measure, for example, the chlorine content, the cyanuric acid content or also alkalinity and dose substances for water treatment into the pool water depending on this, so that very good control of the water quality in the pool basin is achieved.

[0016] In a further embodiment of the measuring and dosing device, at least one temperature sensor is preferably provided for measuring the temperature of the water in the pool basin. Preferably, the temperature sensor is arranged at the bottom of the measuring and dosing device in order to detect the water temperature as low as possible, i.e., without significant influence from the water surface, for example, direct sunlight. The water temperature is important because it determines, among other things, the amount of disinfectant required.

[0017] If means for drawing water into and expelling water from the measuring and dosing device are provided, wherein the water is passed by means for determining water quality, preferably by means for determining pH and / or by means for determining redox potential, and optionally by openings of provided dosing agents, then, according to a further embodiment of the measuring and dosing device, the water quality can be measured particularly easily and accurately via measuring cells. Preferably, depending on the measured pH and / or redox potential values, means for adjusting the pH, preferably pH-reducing agents and / or disinfectants, can be added to the drawn-in water via the dosing agents.This ensures particularly thorough mixing of the water with the water treatment agents before they are released into the pool water. In particular, this significantly reduces the risk of locally excessive chlorine concentrations. The means for drawing in and expelling water preferably include electric pumps and corresponding water flow systems in the measuring and dosing device.

[0018] According to a further embodiment, the means for drawing water into the measuring and dosing device have at least one inlet opening, which is arranged relative to the at least one outlet opening of the means for ejecting water from the measuring and dosing device such that no freshly treated water is drawn from the at least one outlet opening into the inlet opening. For example, the measuring and dosing device can have a longitudinal extension in one direction, wherein the means for drawing water into and ejecting water from the measuring and dosing device have at least one inlet opening and at least one outlet opening, and the at least one inlet opening is arranged at a distance of at least one-third of the longitudinal extension of the measuring and dosing device from the outlet opening, below the water level, preferably at the bottom of the measuring and dosing device.This ensures that the intake opening does not draw in water that has just been treated, thus avoiding incorrect measurements.

[0019] Preferably, the dosing agents of the disinfectant and / or the dosing agents of the pH adjuster in the pool water are designed to expel water enriched with the agent to be dosed from the measuring and dosing device. This allows for a sufficiently low concentration of the disinfectant, in particular, to be dispensed as an alternative to dosing directly into the water flowing past the measuring cells, thus reducing health risks. Alternatively, the dosing into the water flowing past the measuring cells can also be carried out with water already diluted from the pool water.

[0020] According to a further preferred embodiment, at least one sensor is provided for determining the fill level of the storage medium, wherein the sensor is preferably designed as a weight sensor, and particularly preferably as a load cell. The sensor can not only monitor the fill level of the storage medium, but also simultaneously monitor the dosage of the water treatment substances. This is particularly advantageous for the disinfectant and the pH-adjusting agents in the pool water. This is achieved particularly easily with weight sensors, which can determine the dosed quantity with sufficient accuracy from the weight difference before and after a dosing process. This increases the risk of overdosing and ensures that water treatment substances are used very economically.Load cells have the advantage that they can be easily arranged below a receptacle for the respective storage medium and achieve high precision in measuring the weight of the storage medium.

[0021] If the storage containers for the water treatment substances, preferably the disinfectant and the pH adjuster, have a maximum volume of 1000 ml, the space required for the measuring and dosing device remains limited, making it suitable for use even in smaller pools, such as whirlpools. At the same time, this size limitation facilitates easy transport, for example, for refilling via parcel service, as some water treatment substances are classified as hazardous materials.

[0022] Mixing up the disinfectant with the pH-adjusting agents in the pool water can lead to incorrect dosing and thus to health problems. Therefore, according to a further embodiment of the measuring and dosing device, the reservoirs for the disinfectant and the pH-adjusting agent are preferably designed to prevent mix-ups, ideally as tamper-proof cartridges. This prevention can be achieved, for example, by using different locking mechanisms and appropriately designed reservoirs. Alternatively, the reservoir caps can also be designed to prevent mix-ups, ensuring they can only be connected to their corresponding dosing agent.In addition, there are other possibilities, such as the use of an electronic identifier, for example via RFID chip, which unlocks the dosing agents.

[0023] According to a further embodiment of the measuring and dosing device, the means for determining water quality, preferably the means for determining the pH value and optionally the means for determining the redox potential of the water in the pool basin, have measuring cells arranged in at least one water channel with inlet and outlet openings. These openings can either be sealed by means of closing the at least one water channel or are geometrically designed such that the measuring cells remain permanently surrounded by water even when the measuring and dosing device is stored outside the pool basin for a certain period of time, for example, several weeks. Siphon-like water channels allow, for example, water to be retained permanently in a specific area of ​​the water channel.

[0024] According to a further embodiment of the measuring and dosing device, the means for closing the water lines with measuring cells arranged therein is designed as check valves, which can particularly well seal off the water lines against water losses and thus give the measuring cells a longer service life.

[0025] Improved accuracy in determining water quality is achieved by ensuring that the water flow, which carries water past the means for determining water quality, has at least one air bubble separator, which prevents or strongly suppresses the passage of air bubbles to the measuring cells of the means for determining the pH value and / or the redox potential.

[0026] If at least one sensor for measuring electrical conductivity is provided on the hull of the measuring and dosing device, the device can detect whether it is in water or not and, for example, only release dosing commands when water is detected. With this design of the measuring and dosing device, water quickly drips off the hull after the device is removed, ensuring that dosing commands can be reliably blocked as soon as the device is out of the water.

[0027] According to a further embodiment, the measuring and dosing device is designed such that its depth in water with empty reservoirs is at least 10 cm, preferably at least 20 cm. This ensures that the measurement of water quality is influenced as little as possible by the water surface and that higher accuracy is achieved in determining the water parameters.

[0028] According to a further advantageous embodiment, the structure of the measuring and dosing device above the waterline, even with empty storage containers, is a maximum of 15 cm high, so that the pool basin can be covered without affecting the function of the measuring and dosing device.

[0029] If the dosing devices have multiple outlet openings for disinfectant and / or for the pH adjuster, the disinfectant and / or the pH adjuster can be well distributed in the pool basin.

[0030] In an advantageous embodiment, the control unit is designed to recognize cleaning or circulation cycles of the pool basin based on measurement data from the measuring cells and / or temperature sensors. This allows circulation or cleaning cycles of the pool basin to be deliberately used for the distribution of substances to adjust water quality, thus achieving an improved distribution of the relevant substances in the pool basin.

[0031] Some disinfectants are temperature-sensitive. Their disinfecting effect diminishes after prolonged storage at high temperatures. Therefore, an advantageous design of the measuring and dosing device incorporates an active or passive cooling device to cool the disinfectant.

[0032] The invention will now be explained in more detail with reference to exemplary embodiments in conjunction with the drawing, which shows: Fig. 1 a perspective view from above of an embodiment of the measuring and dosing device according to the invention in its ready-to-use state, Fig. 2 a perspective view from below of the exemplary embodiment Fig. 1, Fig. 3 the exemplary embodiment from Fig. 1 in a top view, Fig. 4 the exemplary embodiment from Fig. 1 in a top view without lid and in Fig. 5 the exemplary embodiment from Fig. 1 in a sectional view along the section line AA of the Fig. 3.

[0033] Fig. Figure 1 shows an embodiment of the measuring and dosing device 1 according to the invention for measuring and treating water in a swimming pool in a perspective view. The measuring and dosing device 1 has a body 1a which is protected from water ingress by a cover 2.

[0034] The circumferential line 1b shown on the hull 1a indicates the water level when the embodiment is placed in the water-filled pool basin with full reservoirs. This ensures that the draft of the measuring and dosing device 1 in the water with empty reservoirs is at least 10 cm, preferably at least 20 cm. The operation of the measuring and dosing device 1 thus takes place in an area essentially unaffected by surface effects.

[0035] The lid 2 has two additional screwed lid sections 3 and 4, which can be opened to arrange storage materials within the measuring and dosing device 1. The illustrated embodiment of the measuring and dosing device 1 is, for example, watertight sealed with the lid 2 and its lid sections 3 and 4, and is therefore buoyant and / or submersible. The Fig. The geometric shape shown in Figure 1 is merely one way of realizing the measuring and dosing device 1 according to the invention.

[0036] The central area of ​​the cover 2 has status LEDs 5, which indicate the operating status of the measuring and dosing device 1. Two outlet openings 6, 7 for treated water are shown in the "rear" area of ​​the body 1a of the measuring and dosing device 1.

[0037] Another perspective view of the embodiment from Fig. 1 from the bottom shows Fig. 2. In Fig. Figure 2 shows a water inlet opening 8 and a temperature sensor 9.

[0038] Finally, it shows Fig. 3 a top view of the embodiment from Fig. 1 with the lid 2, the further lid areas 3 and 4 and the middle section with status LEDs 5.

[0039] A top view of the embodiment shown Fig. 3 with lid open 2 shows Fig. 4. Shown are water quality determination devices 10 and 11, as well as storage devices 13 and 14 for water treatment substances. The water treatment substances are dispensed from the storage devices, shown here as cartridges 13 and 14, into the pool water via dosing devices 15 and 16. For this purpose, the control unit and the power supply for the measuring and dosing device are located in a gas- and watertight box 18. The storage devices are, of course, connected to the water outlet openings 6 and 7 via media lines through the dosing devices. For the sake of simplicity, the water lines to the outlet openings 6 and 7, as well as the media lines from the storage devices to the dosing devices and to the water lines, are shown in Fig. 4 not shown.

[0040] Using the water quality measuring devices 15 and 16, the control unit allows for precise dosing of water treatment substances during swimming or diving in the pool, ensuring consistently good water quality. A wireless power supply allows the measuring and dosing device to float independently in the pool. Alternatively, a wired power supply allows for extended operating time in the pool.

[0041] Preferably, in the present embodiment, the following are used as means for determining water quality - Agent for determining the pH value of the water in the pool basin 10 as well as - Storage and dosing equipment for at least one disinfectant 13, 15 and Storage and dosing equipment for at least one agent for adjusting the pH value of the water in the pool basin 14, 16 is provided. With this variant of the embodiment, the disinfectant can be dispensed continuously or at fixed intervals, and simultaneously, via the control unit and the means for determining the pH value of the water, a constant disinfection effect and thus good water quality for swimming in the pool can be achieved. At a set pH value, a constant or time-interval-controlled dosage of an aqueous solution containing hypochlorous acid, sodium hypochlorite, and sodium chloride can be used as the disinfectant. This is particularly economical.

[0042] Preferably, as a means of determining the quality of the pool water, an additional means of determining the redox potential of the water in the pool basin 11 is provided, so that an aqueous solution containing mixtures of chlorine-I, chlorine-II oxides (ClO2) and sodium chloride can be used for disinfection, which is particularly effective.

[0043] Preferably, as in Fig. Figure 2 shows a temperature sensor 9 located at the base of the measuring or dosing device. Preferably, however, the temperature sensor can also be arranged within water channels used to determine water quality.

[0044] In addition, means for drawing water into the measuring and dosing device and for ejecting water from the measuring and dosing device are provided, here in the form of a pump 17 and water lines not shown, wherein the water is passed before being ejected by the means for determining the water quality, preferably by the means for determining the pH value 10 and / or by the means for determining the redox potential 11 and further optionally by openings of dosing means 15, 16 and optionally also by a temperature sensor 9.

[0045] As in Fig. 1 and Fig. As can be seen in Figure 2, the illustrated embodiment of the measuring and dosing device 1 has a longitudinal extension in one direction, wherein the means 17 for drawing water into the measuring and dosing device and ejecting water from the measuring and dosing device have at least one inlet opening 8 and at least one outlet opening 6, 7, wherein the at least one inlet opening 8 is arranged at a distance of at least one third of the longitudinal extension of the measuring and dosing device from the outlet opening 6, 7 below the water level, preferably at the bottom of the measuring and dosing device 1.

[0046] Preferably, the dosing agents of the water treatment substances, particularly preferably the dosing agents of the disinfectant and / or the dosing agents of the pH-adjusting agent in the pool water, are designed to discharge water enriched with the agent to be dosed from the measuring and dosing device. For this purpose, the dosing agents can, for example, have their own water lines that are connected to the pool water and allow pool water to be drawn in for dosing. This ensures good dilution of the water treatment substances during dosing, which increases the accuracy of the dosing.

[0047] Fig. 5 now shows the exemplary embodiment from Fig. 1 in a sectional view along the section axis AA of the Fig. 3. In Fig. Figure 5 shows that the storage containers 13, 14 for water treatment substances are clearly visible. Additionally, sensors 19, 20 are provided for determining the fill level of the storage containers 13, 14 containing the water treatment substances, preferably the disinfectant and the pH adjuster. The sensors 19, 20 are preferably designed as weight sensors, and particularly preferably as load cells. The dosing process of the dosing agents can be monitored very effectively using the sensors 19, 20 by measuring the weight of the storage container 13, 14 before and after each dosing process. Measuring the motor current of the respective dosing agent during each dosing process could also serve as a further parameter for monitoring the dosing.

[0048] The storage containers 13, 14 preferably have a volume of no more than 1000 ml, so that they can be distributed by parcel service. Preferably, the storage containers 13, 14 for the water treatment substances, preferably the disinfectant and the pH adjuster, are designed to prevent mix-ups, preferably as tamper-proof cartridges 13, 14. Tamper protection can be provided, for example, by different geometric shapes of the cartridges 13, 14 or additionally or alternatively by tamper-proof lids 21, 22. Furthermore, there are other Fig. 5 possibilities not shown to ensure the safety of the product from being mixed up, for example by using an electronic identifier, for example via RFID chip, which first activates the dosing agents 15, 16.

[0049] The in Fig. The means for determining water quality shown in Figure 4, 10, 11, preferably the means for determining the pH value and / or the means for determining the redox potential of the water in the pool basin, have measuring cells and are preferably arranged in at least one in Fig. The water guide 23 shown in Figure 5 has an inlet opening 8 and an outlet opening 6, 7, which can either be sealed by means for closing the at least one water guide 23 or are geometrically designed such that the measuring cells 10, 11 are surrounded by water even when the measuring and dosing device 1 is stored outside the pool basin for a certain period, for example, at least two weeks. This extends the service life of the measuring cells and ensures constant measurement results even if the measuring and dosing device is not in the pool basin for an extended period. Preferably, the means for sealing the measuring cells are designed as a check valve, which provides a good seal and can also be controllable.

[0050] Not shown is in Fig. 1, that in the exemplary embodiment of the measuring and dosing device 1 at least one sensor is provided on the hull 1a for measuring the electrical conductivity. This sensor can enable the operation of the measuring and dosing device 1, or even just its dosing agent, for example only upon contact with water, i.e., a high electrical conductivity such as that which can be measured in water.

[0051] As in Fig. As shown in Figure 1, in the illustrated embodiment the dosing devices have a plurality of outlet openings 6, 7 for water treatment substances, preferably for at least one disinfectant and / or for at least one pH-adjusting agent. The illustrated embodiment utilizes the water guide 23, which is extended to the outlet openings 6, 7.

[0052] The control unit provided in the exemplary embodiment can be configured to detect pool cleaning cycles based on measurement data from the measuring cells 10, 11 and / or the temperature sensor 9, in order to utilize an advantageous time for dosing the water treatment substances. The cleaning cycles regularly include circulating the water in the pool, thus ensuring very good mixing of the water treatment substances, in particular the disinfectant and the pH adjusters.

[0053] Finally, active or passive cooling devices can be provided in the area of ​​sensors 19 and 20 to cool the substances used for water treatment, preferably the disinfectant. Cooling can increase the effectiveness and shelf life, particularly of the often temperature-sensitive disinfectants.

Claims

[1] Floating and / or submersible measuring and dosing device (1) for measuring and chemically treating water in a pool with - means for determining the water quality in the pool (10, 11), - at least one storage and one dosing means (13, 14, 15, 16) for at least one water treatment substance, - at least one control unit for controlling the dosing agents (15, 16), preferably depending on the water quality in the pool and - means for supplying power to the measuring and dosing device (1). [2] Device according to claim 1, characterized by that as a means of determining water quality - means for determining the pH value of the water in the pool (10) and - storage and dosing means for at least one disinfectant (13, 15) and - storage and dosing means are provided for at least one agent for adjusting the pH value of the water in the pool (14, 16). [3] Device according to claim 1 or 2, characterized by that means are provided for determining a redox potential of the water (11) in the pool. [4] Device according to one of claims 1 to 3, characterized by that at least one temperature sensor (9) is provided for measuring the temperature of the water in the pool. [5] Device according to one of claims 1 to 4, characterized bythat means (17) are provided for sucking water into the measuring and dosing device (1) and expelling water from the measuring and dosing device (1), wherein the water is guided past the means for determining the water quality (10, 11), preferably past the means for determining the pH value (10) and / or past the means for determining the redox potential (11) and further optionally past openings of dosing means (15, 16) before being expelled. [6] Device according to one of claims 1 to 5, characterized by that the means (17) for sucking into the measuring and dosing device have at least one inlet opening (8) which is arranged in relation to the at least one outlet opening (6, 7) of the means for expelling water from the measuring and dosing device (1) in such a way that no freshly treated water is sucked from the at least one outlet opening (6, 7) into the suction opening. [7] Device according to one of claims 1 to 6, characterized by that the dosing means of the substances for water treatment (15, 16), preferably the dosing means (15) of the disinfectant and / or the dosing means (16) of the agent for adjusting the pH value of the water in the pool are designed to eject water enriched with the agent to be dosed from the measuring and dosing device (1). [8] Device according to one of claims 1 to 7, characterized by that sensors (19, 20) are provided for determining the fill level of the storage means (13, 14) of the substances for water treatment, preferably the storage means (13) of the disinfectant and the storage means (14) of the agent for adjusting the pH value, wherein the sensors (19, 20) are preferably designed as weight sensors, particularly preferably as a load cell. [9] Device according to one of claims 1 to 8, characterized bythat the storage means (13, 14) of the water treatment substances, preferably the disinfectant and the agent for adjusting the pH value, have a maximum volume of 1000 ml. [10] Device according to one of claims 1 to 9, characterized by that the storage means (13, 14) of the water treatment substances, preferably the storage means (13) of the disinfectant and the storage means (14) of the pH adjusting agent are designed to be interchange-proof, wherein these are preferably designed as interchange-proof cartridges (13, 14). [11] Device according to one of claims 1 to 10, characterized bythat the means for determining the water quality (10, 11), preferably the means for determining the pH value (10) and / or the means for determining the redox potential (11) of the water in the pool basin have measuring cells, are arranged in at least one water guide with intake and discharge openings (6, 7, 8), which can either be sealed by means for closing the at least one water guide or are geometrically designed in such a way that the measuring cells are surrounded by water even when the measuring and dosing device (1) is stored outside the pool basin, preferably for a period of at least two weeks. [12] Device according to one of claims 1 to 11, characterized by that the means for closing the water guide (23) with measuring cells arranged therein is designed as a check valve. [13] Device according to one of claims 1 to 12, characterized bythat the water guide (23) which guides water past the means for determining the water quality (10, 11) has at least one air bubble separator which can prevent or strongly suppress the further transmission of air bubbles to the means for determining the water quality (10, 11). [14] Device according to one of claims 1 to 13, characterized by that at least one sensor for measuring an electrical conductivity is provided on the body (1a) of the measuring and dosing device (1). [15] Device according to one of claims 1 to 14, characterized by that the draught of the measuring and dosing device (1) in the water with empty storage means is at least 10 cm, preferably at least 20 cm. [16] Device according to one of claims 1 to 15, characterized bythat the dosing means (15, 16) have a plurality of outlet openings (6, 7) for substances for water treatment, preferably for at least one disinfectant and / or for at least one agent for adjusting the pH value. [17] Device according to one of claims 1 to 16, characterized by that the control unit is designed to detect cleaning cycles of the pool based on measurement data from the measuring cells and / or temperature sensors (9). [18] Device according to one of claims 1 to 17, characterized by that an active or passive cooling device is provided for cooling the substances for water treatment, preferably the disinfectant.

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