Water meters

Recently, the issue of installing or replacing water meters is becoming very relevant for many families. These devices can significantly reduce the cost of payment for utilities, and therefore - save money .

How to choose a water meter for cold water?

In order to correctly select new water meters , including cold water, you need to navigate in the classification of devices depending on certain characteristics.

The meters are divided into these types depending on whether they are used to account for the flow of what kind of water:

• for cold water - designed for temperatures up to 40 ° C;
• for hot water - for temperatures up to 150 ° C;
• Universal, which are used for cold and hot water.

Also, all meters are classified according to their power requirements. According to this principle, the devices are divided into:

• non-volatile - do not require additional power supplies;
• volatile - operate from the mains, when the supply of electricity is cut off, their work is stopped.

Household counters, which are used for installation in apartments and houses, are divided into tachometric and electromagnetic.

Tachometric counters

Tachometric meters are installed on pipes whose diameter does not exceed 40 mm.

The advantages of tachometric counters are:

• small, compact size;
• high accuracy of measurements;
• low cost;
• reliability;
• long service life. The service life of water meters can be 12 years or more, with periodic verification.

There are 3 main types of these devices, depending on the basis of their design:

1. Wing counters . The basis of their design is the detail of the impeller, which rotates under the influence of the flow of water in the pipe. According to their principle of operation, the vane instruments can be:

• single-jet - the impeller rotates a single stream of water in the pipe;
• multi-jet - the measured flow of water is divided in front of the impeller blades into several jets. This provides more accurate measurements of the consumption of water consumed.

Also tachometric counters are:

• wet type - the counting mechanism is located directly in the water. Disadvantages are the effects of contaminants, which distort the readings of the device and disable it. To protect the mechanism from their effects, it is recommended to install a filter;
• dry type - the counting device is separated from the water by a non-magnetic septum. It is more protected, but also higher in value.

Electromagnetic counters

This type of instrument has advantages that are decisive in their choice:

• with high accuracy give indications, which are based on the data of the water velocity and the average area of ​​its flow;
• the absence of dependence on the temperature and density of the liquid.

But also it is necessary to consider such moments:

• the readings are affected by the sediment in the water, which can lead to inaccurate data after a year of operation;
• dependence on the electricity network, in the event of a power failure, the meter turns off.

Thus, studying the characteristics of water meters will help you make the right choice.