At present, the decision to register water has become relevant, namely, to install meters for cold and hot water. Of course, no one wants to pay, for example, for a neighbor from above, who takes baths several times a day. Thus, many install meters that track the cubic capacity of water spent personally by your family. It is worth noting that if you plan to insulate the bath from the inside, then you should be careful not to damage the counters.
Directly when buying a meter, you should clarify all its features. For example, you can consider a design that differs from each other depending on the nature of the measurement, namely, they are divided into (electromagnetic, ultrasonic, tachometric and vortex).
Looking in more detail at electromagnetic (induction) meters, you can see that they work when connected to electricity. It is based on the principle of the influence of an electromagnetic field on a fluid flow.
In addition, it is worth paying attention that there are no moving elements in the electromagnetic meter that are directly in the flow. Thus, stagnant zones are not created in this counter, namely, the pressure of the water goes without changes.
The disadvantage in such a system is not the accuracy of the measurement, in case rust or scale appears inside it.