The operation of modern household and industrial appliances largely depends on the correct and uninterrupted operation of electronic devices. In many ways, this state of affairs suits, however, as soon as a failure occurs, the normal rhythm of life turns into a continuous hassle. But in principle, nothing terrible happens, just one of the components fails.

It is to such components of modern household appliances and includes a water flow sensor. A simple device that is equipped with gas hot water boilers, systems autonomous water supply, irrigation systems, well pumps.

Like all electronic components, the water flow sensor also has the principles by which it works. In principle, everything is simple here, the whole point of his work is to signal whether there is water movement or not. The sensor is installed, for example, in a pipe. When the faucet is closed, there is no water movement, and as soon as the faucet opens, the water begins to move and the sensor is triggered, the contacts close and the signal goes to the control board.

True, it is necessary to immediately indicate that the sensor is preliminarily adjusted to a certain sensitivity threshold - this is when the movement of water must reach a certain level, for example, 1.7 liters per minute. That's when the sensor will turn on, while it will continue to work until the water supply rate drops below the mark, and then the contacts open and the control board stops receiving a signal.

Areas of use

In domestic conditions, water flow sensors have found their application mainly in devices that require constant monitoring of home life support systems and compliance with a certain mode of their operation. By controlling the water supply, motion sensors can significantly reduce the cost of maintaining a home, make life much more comfortable and safer.

For gas boiler

The main place of application of the water flow sensor in modern houses steel gas boilers. Equipped with such sensors, modern gas boilers combine the functions of a hot water heater and a heating boiler.

Water flow sensor installed on the supply pipeline tap water reacts to the beginning of the movement of water when the tap is opened hot water.

The sensor sends a signal to the boiler control board, and the electronics turns off the heating circulation pump, turns off the gas heating nozzles, and closes the water circulation valve in the heating system. And then the board turns on the heating nozzles running water and the water heating process starts in the heat exchanger. When the tap is closed, the sensor detects the stoppage of water movement, which is signaled to the control board.

for pump

Many modern households are equipped with autonomous water supply systems. Such systems allow you to have a level of comfort comparable to apartments in a private house, but at the same time not depend on a centralized water supply.

The system, consisting of a pump, a water tank and a control system, allows you to serve all the necessary comfortable living systems - washing machines, dishwashers, enjoy hot water and toilet.

The role of the water flow sensor is that when any of the devices connected to the water supply system is turned on or water is taken, the sensor turns on the pump and the water supply automatically starts. It doesn't matter if the laundry starts, the tap in the kitchen opens or the toilet bowl goes down.

Another option for using water flow sensors is automatic irrigation systems. Here, in addition to the opening function, the flow sensor controls the amount of water used for irrigation. This function is necessary to control metered watering and avoid waterlogging of the soil. The sensor installed on the central pipeline provides information to the system control panel.

Kinds

Today, two types of water flow sensors have found the greatest application - a Hall sensor and a reed relay.

The flow water sensor, based on the principle of operation of the Hall sensor (it is also called a flow meter), is a small turbine on which a magnet is mounted. When the turbine rotates, the magnet creates a magnetic field and, like a turbine in a hydroelectric power plant, it generates small electrical impulses that go to the boiler control board. The speed of rotation of the turbine depends on the speed of the water supply, the greater the flow, the clearer the pulses. Thus, thanks to the Hall sensor, it is possible not only to signal the flow of water, but also the speed of the water supply.

The reed water flow sensor is a sensor based on the principles of a magnet. Basically, this sensor looks like this - inside the chamber made of composite material there is a magnetic float, with an increase in water pressure, the float moves around the chamber and acts on the reed switch.

The reed switch, and this is nothing more than two magnetic plates in a chamber without air, opens under the influence of the magnetic field of the float, and the control board switches the boiler to hot water mode.

Installation

Considering that most water flow sensors are structurally part of the devices, their installation is required only in case of replacement in case of failure. However, there are situations when the water flow sensor must be installed separately, for example, when it becomes necessary to increase the pressure of the water supply.

After all, situations often occur when the system central water supply insufficient pressure, and to turn on gas boiler in hot water mode, it is necessary to create a good pressure. In this case, an additional circulation pump is installed, equipped with a water flow sensor.

AT this case the sensor is installed after the pump, so when the water begins to move, the sensor turns on the pump and the water pressure rises.

Overview of models and prices

Water flow sensor for pump Grundfos UPA 120

Main application - automatic control water system pump. The sensor is designed to provide water supply to an individual house, apartment, equipped with an individual water supply system. Switching on the automatic sensor occurs with a steady flow of liquid in the range of 90-120 liters per hour.

The main purpose is to protect the pump from idling. The sensor is used with booster pumps GRUNDFOS series UPA. These units have small linear dimensions, which allows installation directly into the water supply line.

The use of a sensor allows the pump to operate in several operating modes, allowing both automatic switch on, and inclusion if necessary. The sensor automation turns off the pump in the event of an increase in pressure in the water supply to a normal value.

Characteristics:

• power consumption - up to 2.2 kW;
• degree of protection - IP 65;
• manufacturer - GRUNDFOS;
• country of origin - Romania, China;

The price is 30 dollars.

Water flow sensor of the GENYO series - LOWARA GENYO 8A

Products of a company specializing in the production of various electronic devices for control systems. The model is designed to control the pump household system water supply based on actual water consumption. The main feature of the sensor is to control the pressure in the water supply during operation. The LOWARA GENYO 8A sensor is designed to start the pump when the water flow reaches 1.5-1.6 liters per minute.

Characteristics:

• the pump is started at a water flow rate of 1.5 liters per minute;
• operating voltage of the sensor - 220-240 V;
• current consumption frequency - 50-60 Hz;
• maximum current consumption - 8A;
• power consumption - up to 2.4 kW;
• operating temperature range - 5-60 degrees Celsius;
• degree of protection - IP 65;
• manufacturer - LOWARA ;
• country of origin - Poland;

The price is 32 dollars.

Designed for installation in gas double-circuit boilers trademark Immergas. Compatible with models: Mini 24 3 E, Victrix 26, Major Eolo 24 4E | 284E. The flow sensor for hot water supply is designed for installation in gas boilers trademark Immergas chimney and turbocharged versions. The flow sensor is made in a plastic housing with a threaded connection. Hall sensor 1.028570 allows you to get water at the outlet of the hot water circuit with a stable temperature,

Price $41.

The water flow sensor for the pump is an integral part of the equipment designed to protect the device from running dry. The sensor is small and simple design, which allows you to install it even for a beginner.

Features and Benefits of the Water Flow Sensor

Often there are situations in which the pump starts at the moment of complete absence of liquid in the pipeline. This provokes heating of the motor of the unit and its further breakdown. To avoid such situations, a fluid flow sensor should be used. This device works automatically and controls the flow of water inside the pipeline. If the amount of liquid passing through the sensor is less than the norm, the device automatically turns off the pump. Thus, the water flow switch not only prevents the pump from running dry, but also maintains normal operating conditions for the unit.

The benefits of using a sensor include:

• Reducing the electricity consumed by the pump and saving money;
• Protection of equipment from breakdowns;
• Extending the life of the pump.

Among other things, the water flow switch for the pump is distinguished by its modest dimensions, low cost and ease of installation.

Water flow switch - principle of operation and design

The main function of the sensor is to turn off the pumping equipment in the event of a drop in water level or an increase in pressure in the pipeline. If the amount of water increases or the pressure drops, the liquid flow indicator restarts the equipment. Its structural elements are responsible for the stable performance of the tasks assigned to the relay.

The device device consists of the following parts:

• A pipe through which liquid enters the device;
• A membrane that plays the role of one of the walls of the inner chamber of the device;
• Reed switch, which is responsible for opening and closing the circuit in wiring diagram pump;
• Two springs of different diameters - by compressing them, the water pressure is controlled, at which the fluid flow sensor will be triggered.

The principle of operation of the relay is as follows:

1. When it enters the internal chamber of the device, water exerts pressure on the membrane, thereby shifting it to the side;
2. The magnet located on the back of the membrane gets closer to the reed switch, due to which its contacts close and the pump turns on;
3. If the water level drops, then the membrane with the magnet moves away from the switch, which leads to the opening of its contacts and turning off the pump.

Installing a liquid flow detector in a pipeline is quite simple. To do this, you need to study the features of connecting the device and its correct configuration.

Device connection diagram

The performance of a relay is highly dependent on its correct installation. It must be remembered that the device can only be installed on those sections of the pipeline that are located horizontally. In this case, it will be necessary to ensure that the sensor membrane is in a vertical position. Correct scheme The relay connection looks like this:

During installation, the sensor must be connected to the drain part of the pipe by means of a threaded connection. The distance at which the relay must be located from the pipe must be more than 5.5 cm.

On the body of the device there is an arrow indicating the direction of circulation of the liquid. When installing the device, make sure that this arrow coincides with the direction of the water flow in the system. If used for domestic purposes dirty water, then a cleaning filter should be installed in front of the sensor.

The water flow sensor is a device that regulates the pressure inside the water supply system. It is connected to the pumps through pipes. The main parameters of devices should include not only the limiting pressure, but also the output voltage. Manufacturers also indicate without fail throughput. Today there are many types of modifications. To understand the issue in more detail, it is worth first of all to study the device of the water flow sensor.

Model device

The standard water flow sensor circuit includes a relay and a set of plates. Inside the modification there is a wide chamber. The flask is always in a stationary state. Inside it is a small float. There is a feeding channel at the output. Many modifications are made with an adjusting tap, which is installed at the outlet. Models with valves are equipped with movable fittings. They use magnetic force to work.

Sensor: DIY

Making a water flow sensor with your own hands is quite simple. First of all, it is recommended to install the camera. For this, a small plastic container. Then you will have to cut three plates that are installed in a horizontal position. The flask as a result should not come into contact with them. If we consider a simple model, then one float is enough. It is more expedient to install the fitting on two adapters. The valve must withstand a pressure of at least 5 Pa.

Types of modifications

By design, only relay and fitting devices are distinguished. Additionally, modifications are separated according to the pressure level. Devices for circulation pumps are allocated in a separate subcategory.

Relay models

The relay water flow sensor for a gas boiler is suitable for small power pumps. As a rule, models are produced with one chamber. Many experts say that they have low conductivity. However, it should be noted that there are devices with vertical arrangement plates. Their limiting pressure is at least 5 Pa. Protection systems are quite often used by the P48 series. All this suggests that water leaks are rarely observed. Modifications are characterized by excellent stability. Their suction power is at least 3 N. Very rarely, models have faucets.

Union devices

The most common devices for pumps are choke modifications, which are produced with one chamber. Their plates are usually located in a horizontal position. Some modifications are equipped with two valves. And their limiting pressure parameter is approximately 5 Pa. Protection systems are quite often used class P58. In this case, the conductivity depends on the size of the fitting. Some modifications are capable of boasting a high pumping speed. Their connections are quite often threaded. There are also clip-on sensors on the market, which are not very popular.

Low pressure devices

Modifications low pressure well suited for centrifugal pumps up to 4 kW. Their conductivity depends on the size of the chamber. The most common on the market is a water flow sensor for a two-float pump. In this case, the pumping force is on average 5 N. Protection systems are used in different classes. Many sensors are installed through pads. Output contacts are designed for wire adapters. It is also worth noting that there are many inexpensive models on the market.

High pressure modifications

Models high pressure, as a rule, are made with one oblong fitting. The plates on the water flow sensor for the pump are most often installed in a horizontal position. If you believe the reviews of experts, then the models are great for centrifugal pumps. When choosing a modification, it is important to pay attention to the throughput of devices. The dimensions of the devices are also taken into account. Many models are made with two cameras. However, they only use one valve. If we consider the standard model, then the limiting pressure averages no more than 6 Pa. The protection system in the devices is applied class P70. It is very rare to find models with a crane. Basically, ordinary switches are installed.

Devices for circulation pumps

Sensors for circulation pumps are very much in demand. A distinctive feature of the modifications is considered to be low reducibility. The limiting pressure is on average 3.3 Pa. Protection systems are used in various classes. It is very rare to find devices with two cameras. When choosing a model, it is important to pay attention to the shape of the fitting. It should have a wide head and a narrow channel. Otherwise, leaks will often occur. In addition, it is worth noting that devices on floats are on the market. Their contacts are designed for adapters.

Features of models for two cameras

Sensors for two chambers, as a rule, are distinguished by large dimensions and a high pressure parameter. There are many models on the market for two valves. They have a suction force of 4 N. Protection systems are used in the P88 series. The plates of the sensors are always installed in a horizontal position. If we talk about the shortcomings of the devices, it is important to note that they use very large output channels. For pumps with a power of up to 8 kW, models are not uniquely suitable. There are devices on the market with and without taps. Additionally, there are modifications based on contactor switches.

Devices with three cameras

Sensors for three chambers are connected for centrifugal pumps. Their compressive strength is very high. It is also worth noting that the models are produced with short channels. Valves they use rotary type. They are protected by a special membrane. According to experts, the conductivity depends on the size of the chamber. If we talk about designs, it is worth noting that there are models on the market with oblong fittings. They have extremely low suction power. However, they can last a long time. In stores, devices with switches are very rare. As a rule, three-chamber models are made with small cranes.

Models for small pumps

The water flow sensor for pumps of low power should be selected only among fitting modifications. The limiting pressure indicator should be about 5 Pa. The protection system is welcome class P48. Many experts praise devices based on two cameras. Their suction force is approximately 4 N. Relay modifications for low-power pumps are not suitable in the best way.

Modifications with a vertical arrangement of plates

Devices of this type show themselves well centrifugal pumps. They have good conductivity and no problems with high blood pressure. However, do not forget about the disadvantages of modifications. First of all, they often clog the channel. If we consider an inexpensive water flow sensor, then it may have problems with the valve. For the normal operation of the system, it is more expedient to select devices with output contacts for 12 V. The protection system must be installed class P55. Experts also say that the water flow sensor should be with a contactor switch.

Devices with a horizontal arrangement of plates

The water flow sensor for this type of boiler is suitable for a wide variety of pumps. The conductivity of the models depends on the dimensions of the chamber itself, as well as the channel. Additionally, the diameter of the fitting is taken into account. Many experts recommend installing two-chamber modifications. Their pumping force, as a rule, does not fall below 5 N. The protection system is quite often used by the P50 series. All this suggests that the manufacturer guarantees a high degree of sealing and overall reliability.

When choosing a device, it is important to evaluate the parameters of the valve. If it is made of ordinary plastic, then it is not able to last for a long time. Copper counterparts perform well, but are expensive. The main flask of the sensors is made of plastic. Very rarely there are modifications with transitional contacts. Relay modifications boast high conductivity. They are not afraid of overload. And they use quality systems protection.

Careful attitude to the equipment that provides water supply, significantly extends its working life, guarantees uninterrupted operation of the system. This requires not only timely inspection and proper care, but also equipping the pumps with a full range of protection devices. It is much cheaper to prevent the possibility of a serious breakdown than to repair or buy a new unit. Do you agree?

Installing a water flow switch will protect the engine of both surface and deep pumping equipment. Indeed, most often when a motor burns out, it is easier to buy a new pump than to change it. We will tell you how this important protective device works, how to choose it and include it in an autonomous water supply.

The article contains valuable advice for the installation of pump protection devices against operation in "dry running" conditions. The technology of customization for individual requirements has been disassembled. For better perception A considerable amount of information is accompanied by photographs, diagrams, video reviews and manuals.

In domestic water pipes, an accident-threatening action quite often occurs. pumping station without water. A similar problem is called "dry running".

As a rule, the liquid cools and lubricates the elements of the system, thereby ensuring its normal performance. Even a short dry run leads to deformation of individual parts, overheating and failure of the equipment engine. Negative consequences apply to both surface and deep pump models.

Dry running occurs for various reasons:

• wrong choice of pump performance;
• unsuccessful installation;
• violation of the integrity of the water pipe;
• low fluid pressure and lack of control over its level, for which they are used;
• accumulated debris in the pumping pipe.

An automatic sensor is necessary in order to completely protect the device from the threats posed by lack of water. It measures, controls and maintains the constancy of the parameters of the water flow.

Pumping equipment equipped with a sensor has many advantages. It lasts longer, fails less often, consumes electricity more economically. There are also relay models for boilers

The main purpose of the relay is to independently turn off the pumping station in case of insufficient fluid flow power and turn it on after normalization of the indicators.

Design and principle of operation

The sensor has a unique device, thanks to which it performs its immediate functions. The most common modification is the petal relay.

The following important elements are included in the classical structure scheme:

• an inlet pipe that passes water through the device;
• a valve (petal) located on the wall of the inner chamber;
• isolated reed switch that closes and opens the power supply circuit;
• springs of a certain diameter with different compression ratios.

At the time when the chamber is filled with liquid, the force of the flow begins to act on the valve, displacing it around the axis.

The magnet built into the reverse side of the petal comes close to the reed switch. As a result, the contacts are closed, including the pump.

The flow of water is understood as the speed of its physical movement, sufficient to turn on the relay. Reducing the speed to zero, resulting in a complete stop, returns the switch to its original position. When setting the response threshold, this parameter is set taking into account the conditions of use of the device

When the flow of fluid stops and the pressure in the system drops below normal, the spring compression weakens, returning the valve to its original position. Moving away, the magnetic element ceases to operate, the contacts open and the pumping station stops.

Some modifications are equipped with a return magnet instead of springs. Judging by the feedback from users, they are less affected by small pressure surges in the system.

Petal relays are characteristic a large number of pluses. Among them are a simple and unpretentious design, instant response, no delays between repeated responses, the use of an accurate trigger to start equipment.

Depending on the constructive solution there are several other types of relays. These include rotary devices equipped with a paddle wheel rotating in a water stream. The speed of rotation of the blade in them is controlled by touch sensors. In the presence of liquid in the pipe, the mechanism deviates, closing the contacts.

There is also a thermal relay that operates in accordance with thermodynamic principles. The device compares the temperature set on the sensors with the temperature of the working medium in the system.

In the presence of flow, a thermal change is recorded, after which the electrical contacts are connected to the pump. In the absence of water movement, the microswitch disconnects the contacts. Models are characterized by high sensitivity, but they are quite expensive.

Instrument selection criteria

When choosing equipment that controls the strength of the water flow, you should carefully study it. specifications.

Particular attention should be paid to the range operating temperature and the pressure for which it is designed, the diameter of the thread and mounting holes, the protection class, the nuances of the application. It is also important to clarify what materials the product is made of.

Experts consider devices made of brass to be the most reliable and durable, of stainless steel, aluminum. These materials protect the structure from the critical consequences of a frequent phenomenon in plumbing systems - hydraulic shocks.

Considering different modifications of the relay, it makes sense to purchase an option made of metal. The body and working components of such devices are characterized by increased strength.

This fact allows the equipment long time Withstand heavy loads arising due to the significant fluid passing through the sensor.

The pressure value at which the relay operates must correspond to the power installed pump. The parameters of the water flow circulating through the pipeline depend on this characteristic.

It is advisable to choose a device with two springs that controls the operation of the pumping station according to certain lower and upper pressure marks.

The operating temperature range of the sensor directly indicates the possible area of ​​its application. For example, for hot water circuits and heating systems models with a high boundary temperature are intended. For pipelines with cold water quite enough range up to 60 degrees

Another important criterion worth mentioning is climatic conditions necessary for the operation of the product. This is the recommended air temperature and humidity level that the device needs to provide so that it can work with the best performance.

Maximum permissible loads for a particular device determines the protection class specified in the technical specifications.

When buying a flow sensor, you should check the diameter of the thread section and the dimensions of the mounting holes in the equipment: they must fit perfectly with the elements of the pipeline. The correctness and accuracy of further installation, as well as the efficiency of the relay after installation, depend on this.

Trustworthy Instruments

Among the entire range of relays, two models are most in demand, located in approximately the same price category - about $ 30. Let's consider their characteristics in more detail.

Genyo Lowara Genyo 8A

Development of a Polish company engaged in the production of electronic equipment for control systems. It is intended for application in household water supply systems.

Genyo allows for automatic pump control: starting and shutting down based on actual water consumption, preventing any pressure fluctuations during operation. Also, the electric pump is protected from running dry.

The main purpose is to control the pump and control the pressure in the pipes during operation. This sensor starts the pump when the water flow exceeds 1.6 liters per minute. It consumes 2.4 kW of electricity. The operating temperature range is from 5 to 60 degrees.

Grundfos UPA 120

Manufactured in factories in Romania and China. Maintains the stability of the water supply in rooms equipped with individual water supply systems. Prevents pumping units from idling.

The Grundfos brand relay is equipped with a high protection class, allowing it to endure almost any load. Electricity consumption in it is about 2.2 kW

The automation of the device starts at a flow rate of 1.5 liters per minute. The boundary parameter of the covered temperature range is 60 degrees. The unit is produced in compact linear dimensions, which greatly facilitate the installation process.

Liquid flow switches are installed for devices that need constant control and compliance with a certain operating mode. Often they complete the equipment at the production stage. However, there are circumstances where a separate mounting of the sensor is required.

Rules for installing relays in the system

Installation safety device, which determines the presence or absence of water flow in the system, is a reasonable step in cases where it is not possible to be constantly present during the operation of pumping equipment.

It is not required only in two cases:

1. Water is pumped from a large well with unlimited resources by a low power pump.
2. It is possible to independently turn off the unit when the water level drops below the designated norm.

The device is installed on horizontal sections of the pipeline. In this case, it is necessary to ensure that the membrane takes a stable vertical position.

The device is mounted to the drain pipeline using a threaded coupling. Usually a special socket is provided for this.

If there is no hole for mounting the sensor in the pumping equipment, you can replace it with a brass tee. In addition to the relay, a pressure gauge is connected to it, showing the current pressure in the network.

Before proceeding with the direct screwing of the device, it is advisable to seal the thread well with flax or thread sold in specialized departments.

It is better to wind it in a clockwise direction towards the end. This method of fastening increases the reliability of fixation.

In order not to damage the relay, you should screw it very carefully, slightly tightening it with a wrench. The optimal distance between the product and the pipeline is at least 55 mm

When installing the factory sensor, it is necessary to focus on the arrow shown on the case. The direction indicated on it must coincide with the direction of flow of the liquid passing through the device.

If contaminated water is transported through the pipeline, it is recommended to install cleaning filters, placing them near the sensor. Such a move will ensure the correct operation of the product.

At the final stage installation work the dry-running relay is connected to the electrical network:

• a wire core is screwed to the free ends of two groups of contacts;
• a ground is attached to the sensor screw;
• the device is connected to the pump by connecting two devices with an ordinary wire in compliance with.

After connecting to the network, the only thing left is to check the system's performance. The fact that the device is ready for full operation will be indicated by the growth of pressure marks on the pressure gauge and automatic shutdown pump at the moment of overcoming the limit value.

Self-adjustment procedure

There are special bolts in the sensor for adjustment. By loosening or tightening them, you can reduce or increase the compression force of the spring.

Thus, the pressure level is set at which the device will operate.

Almost always, manufacturing companies produce equipment with adjusted settings. Despite this, sometimes additional self-adjustment is required.

In most cases, the setting automatic equipment causes no difficulty.

It is advisable to adhere to the following algorithm:

• drain the fluid from the system until the pressure mark reaches zero;
• turn on pumping unit and slowly run the water back;
• fix the flow pressure indicator when the pump is turned off by the sensor;
• start draining again and remember the indicators at which the pumping equipment will start working;
• open the relay and adjust with an adjusting bolt the minimum level of compression of the larger spring required to operate the device and start the pump (higher compression increases the degree of pressure, less - reduces);
• in a similar way, adjust the compression force of the smaller spring mechanism by setting the boundaries maximum pressure, upon reaching which the relay measuring the water flow will turn off the pump.

After completing all the described manipulations, you should make sure that the adjustments made are correct. To do this, the pipeline is filled with liquid, and then it is drained, evaluating the reaction of the sensor while reaching the set values.

If the test result is not satisfactory, the procedure is repeated.

Having insufficient experience and qualifications, it is better to seek help in adjusting from specialists. They will analyze the specific situation, take into account the technical characteristics of the equipment and select the most correct values ​​​​of the pressure level.

In order for the pipeline through which the liquid passes to work properly and stably, a regular annual check of the flow sensors is carried out. If necessary, the setting of the operating parameters is adjusted.

Conclusions and useful video on the topic

Structure, components and principles of operation:

The process of connecting the device in stages:

Read more about how to adjust the trigger level in the relay:

A relay that controls the flow of water in the pipeline will significantly increase the usability of pumps and extend their life for a long time. Neglect installation safety device highly undesirable, since it not only automates the operation of the equipment, but also protects it to the maximum from possible problems that occur due to idling.

Do you want to install the flow switch yourself, but are a little confused by the instructions? Please ask your questions, and we and the visitors of our site will try to help you.

Or maybe you have successfully coped with the installation and configuration of the device and want to give useful advice other newbies? Write your comments in the block below, add a photo of the installation or setup process - your experience will be useful to many home craftsmen.

Hydraulic water flow sensor - also simply detects the presence of a flow, regardless of the amount of passing fluid, ranging from 1.7 to 30 l / min. The sensor is triggered by pressing the switch button under the influence of the pressure of the passing water. The water flow acts on the boiler membrane, moving the rod with the plate pressing the button of the DHW flow sensor. After the water movement stops, the pressure on both sides of the membrane equalizes and the rod drives back, releasing the flow sensor button to its original position - the contact opens. The use of such a principle for determining the flow has faded into the background with the start of the use of reed flow switches, which have proven to be more reliable, simple and durable.

Water flow switch- allows you to instantly determine the flow of water that has appeared. Structurally, it includes a float of an original design with a built-in magnet and a reed switch. Under the influence of the water flow, the float moves to the upper position, it approaches the sensor. The built-in magnet at the same time acts with its magnetic field on the micro reed switch, which causes the contacts to close. The design feature is that the float does not float up, but moves relative to the axis by the pressure of water. The minimum flow is 1.7 l / min., which can be fixed by the flow switch, a flow limiter is installed at the outlet up to 15 l / min. bandwidth. It helps to avoid the situation when the flow through the heat exchanger exceeds the DHW capacity of the boiler. Insufficient heating may occur due to too high a flow rate in the hot water circuit. Often, in our conditions, we are faced with the opposite situation, when the pressure and water flow are very low, the boiler therefore does not start or overheats the water when operating in column mode, as a way out of the situation - dismantling the flow restrictor.

Hall Sensor- when the magnet in the turbine rotates, a rotating magnetic field arises. The rotation speed of this field completely coincides with the amount of water passing through the flow sensor. The Hall sensor under the influence of this field generates electrical impulses that are read by the boiler board. The frequency of these pulses is used to calculate the water flow rate of the boiler. Thanks to the Hall sensor at the outlet, we get water with a stable temperature, which does not depend on the amount of flow. The use of such a sensor is due to the constant desire of manufacturers gas equipment to achieve maximum comfort during the operation of boilers and columns. The water temperature error when working with such a flow sensor is reduced to a minimum of 1-2 degrees.