<p>The meter (1) has a permanent magnet (3) within a housing (4) of the water volume meter, where magnet is directly connected with an impeller (2). A Hall sensor on a circuit board is connected with a housing, and is disconnected from the magnet through a wall of the housing. The impeller is guided into a shaft, which is rigidly connected with the housing. A gap is formed between the circuit board and the housing.</p>
