Water meters are devices that determine the amount of water consumed in M3. The advantages of their use are indisputable. Comparing the family consumption of 2 people in the counter and the amount for the normative consumption when used without counter, it turns out that accounting on the water meter reduces the monthly water payment by about 2.5 times. And this is with the most economical consumption of water resources. Thus, the counter pays for its value for the shortest time and establish it is certainly profitable. The only drawback of water flow meters is that they must be periodically to verify that is associated with additional financial and temporary costs. But even taking into account this factor, the use of a test for the consumer is much more profitable than payment on the number per month per person numbers.

Types of water meters

To make the optimal selection of the device, it is necessary to understand their designs and arising from this classification. First of all, it is necessary to figure out - a meter of hot water or cold. We function both of these instruments are absolutely the same, only the type of material used in their manufacture of material is different. The meter of the amount of consumed cold water is designed for a temperature of no more than 40 ° C, for hot water this mark ends at the level of 150 ° C. There are also combined devices that take into account the volume and cold and hot flux.

The second separation is carried out on the basis of the type of power, the meters produce non-volatile and vulnerable. In the first case, the device functions without fuel from the side, it does not need electricity to perform its functions. The second is completely dependent on the presence of current and in absence it is stopped. When choosing, this fact should be taken into account, since it is not always possible to provide the power of the device installed in water communications.

Next, instruments for measuring the amount of water spent are divided into categories on the principle of their action. 4 groups are allocated here:

1. Vortex counter. In the design there is a body of a special form, which is placed in the stream. When water moves, this body creates a vortex in a certain amount, this frequency is recorded by the instrument as an indicator of the amount of consumed water.
2. Electromagnetic counters. When passing through the liquid device, a magnetic field is formed. The higher the flow rate of the flow, the higher the field formation rate. This indicator records the counter in its account.
3. Tachometric counters. The fluid flow in such a mechanism passes through the turbine or impeller of a special form. When flowing, this part rotates, this movement and reads by a mechanical path.
4. Ultrasound counters. When the flow of water moves along the pipes or directly through the water consumption record itself, it creates certain sound effects. The characteristics of this sound are directly dependent on the speed of the flow of water and its volumetric mass. The meter takes into account all the characteristics of the sound, thus producing water consumption.

The counters of all kinds and designs are also divided into household and industrial. Accordingly, the first are used for private houses, and the second for large industrial or office buildings. Differences in this case are in the type of material used, the bandwidth of the meter and the ability to take into account great testimony in a short period of time. The household counter simply will not cope with the industrial water consumption, while the industrial device for private housing is just an excessive waste of money, since their value is much higher.

Of all the listed meters for private houses, tachometric and electromagnetic devices are most often used. Since in terms of price, accuracy of readings, ease of installation and operation, they are the most optimal choice.

Taxometric water meters

Cold water meter Tachometric is used in private houses most often. The reason for this is a number of advantages and advantages over other devices for determining the amount of water consumed.

1. The device has compact dimensions and does not create difficulties when installing.
2. The life of the device is very high, since the simplicity of its design causes a high level of reliability. The average service life is 12 years, subject to periodic instrument checks.
3. On tachometric water meters The price is the most democratic, among other varieties of devices.
4. With all its simplicity, such a device has a very low error in the testimony.

The construction of a tachometric meter is based on a small-sized turbine or an impeller, which is spinning when water flow through it. By type of counting mechanism installed in the instrument, division is underway to:

• ONOSTRUE counters. One stream of water passes through the impeller, which gives the pulse for rotational movements, and the meter counts the number of revolutions of the mechanism. Directly the counting occurs so - rotational movements are transmitted to a magnetic coupling, which transmits information to the indicator located on the instrument housing. The structural features of the tachometric counters are such that the metering mechanism itself is isolated from water flow. Due to this, the long service life does not affect the accuracy of measurements. The advantage of using such a system is the ability to establish a pulse entry module. Such a supplement allows you to conduct remote accounting of the device and its testimony. Also, this system is equipped with the protection of the counter from demagnetization.

• Multi-line counters. The structural difference of this device is that the rotating blade is driven by a non-one stream of water, but a few. The separation takes place immediately before the turbine blades or impeller. Such a system increases the accuracy of the instrument readings, besides, the process of removal and installation of the meter is simplified. In multi-line modifications, only the upper part of the meter is removed. In this device, the pulse entry module is also installed.

If the rotating mechanism itself is considered as a whole, then the difference is that it has the same on the principle of operation, but different parts of the part. The diameter of the pipes is varied, which establish certain varieties:

1. For pipes with a diameter of up to 40 mm - wing mechanisms.
2. For pipes with a diameter of 50 to 200 mm - turbine mechanisms.

There are also combined counters that have in their design and impeller and turbine. If regular and strong pressure drops are present in the plumbing, it is precisely such a type of counter.

The following separation of counters defines two groups - dry and wet. In the first group, the counting mechanism does not contact with water, which means its operation is significantly higher. A group of wet devices has an accumulated mechanism. In this embodiment, all impurities and pollution existing in the water are settled on the blades and gradually violate the accuracy of the meter readings. The output from this situation is a filter that is installed in front of the device. The purchase of the filter will incur additional costs, however, the price of the counter with the mechanism immersed into the water is significantly lower than on dry.

The principle of action of the tachometric meter is to convert the impeller turns in the M3 of the consumed water. The simplicity of the mechanism makes it independent of external energy sources, easy to install and operate, small in size and not expensive. Lack of instruments of this type - sensitivity to the magnetic field and the composition of water. Both of these factors gradually reduce the accuracy of the instrument readings.

Electromagnetic water meters

The electromagnetic devices of the water account of the spent are as popular as tachometric. The main advantage of their advantage is in a small error in counting. Water consumption accounting in this device is performed by determining the flow rate and its midline. At the same time, the water temperature, its viscosity and density on the readings do not affect completely. If the goal is to choose the water meter with the most economical readings, the electromagnetic device is the most acceptable option.

Moreover, the physico-chemical properties of water do not affect the records of the testimony, they still have an impact on the accuracy of the device, leaving the precipitate on the inside of the mechanism. Failures in some cases begin after 1 year of use. In absolutely clean water, the counter will also not be able to effectively perform its functions. Another minus is dependent on the presence of power. In the absence of electricity, the counter will not work.

Producers of water meters

High-quality and durable products offer manufacturers from different countries. Among the whole diversity are allocated such trademarks:

• Betar, Tatarstan. Products for measuring the flow of hot and cold water. The range of permissible temperatures for products - 5-40 ° C cold water and 5-90 ° C hot water. Maximum pressure in the system is 1.0 MPa. If necessary, all devices are equipped with a shut-off valve, which prevents the water current in the opposite direction. The goods are certified, all materials are verified and comply with sanitary standards. The interval between checks is 6 years.

• In meter, Italy. Products for accounting for hot and cold water consumption. The ST-15U brand has a wing design with the passage of water into one jet and without the wetting of the reading mechanism. Works at a temperature of from 5 to 90 ° C, the maximum operating pressure of 1.0 MPa. The interval between checks is 4 years.
• Valtec, Italy. High strength counters and reliability class. VLF brand is suitable for hot and cold water, maximum pressure 16 bar, temperature range - 5-90 ° C. The counter is made of brass.
• Triton, Russia. Device for hot and cold water. The housing is made of brass, stainless steel axis. Construction - Porch Wheel. Maximum temperature - 90 ° C, pressure - 1 MPa.

How to choose a water meter

To buy high-quality water meters, you should not choose an import and advertised brand. Domestic manufacturers offer very high-quality products for a lower price. In addition, often devices are produced at joint ventures. Choosing a counter, focus on such indicators:

1. Nominal pressure.
2. Temperature Range.
3. The limit value of the adder.
4. Sensitivity limit.
5. Accounting area.
6. Permissible pressure loss indicator.

When buying a meter, especially if it is purchased not in the corporate store, and from the hands on the market, you need to make sure in the integrity of the packaging. With each device should be the documentation. It specified the service life, as well as the number that matches the number in the panel. The instruments for taking into account water consumption are very sensitive, there should not be chips and scratches on the body, since even a small mechanical impact leads to faults.

Choosing a trademark of the device, you should pay attention to such factors:

1. Is there a license for this product.
2. Whether warranty service is provided.
3. Whether a regular check and replacement of instruments are provided.

Basic Rules Setting the Counter

In order for the device to work for a long time and regularly, it is only a little known only what water meters need to buy. You must correctly install the device. First of all, it is important to choose the right place so that there is free access to the dial and counter panel. In the installation of the device there are three simple rules:

1. Mount the counter at the very end of all welding and repair work.
2. The counting device is located up.
3. The arrow on the side arrow of the casing indicates the required direction of water flow, these factors must coincide.

After installing the counter, it must be registered in the relevant authorities. This is an act of reception, which indicates that the equipment is installed correctly, then sealing is carried out. After installing the meter, it should be remembered that it should regularly undergo inspection in controlling organs.