Cold water meter with magnetic sensor

The water meter from Arad International is used to measure the amount of water that passes through the face line of different posts (liter-10 liters-1 cup...etc). Residential and commercial buildings built by water, public water way. It is also used for example by the system. And knowing how to read a water meter becomes easier to detect areas, such as leaks
So he can watch his net magnetically on him so he can turn it on while it generates pulses when one liter passes through it