Design and function
2017-05-22 / DIS 113_58300000186503_ara_en_c
Copyright by BSH Hausgeräte GmbH
Page 10 of 85
3.3
Flow-through sensor
3.3.1
Structure
Fig. 3:
Components of the flow-through sensor
1
Water inlet
3
Permanent magnet
2
Impeller
4
Reed contact switch
The impeller (2) with a permanent magnet (3) is located in the water inlet (1). The
circuit board with reed contact switch (4) is outside the water inlet in the area of
influence of the permanent magnet.
3.3.2
Function
Inflowing water moves the impeller and the permanent magnet. The rotating
magnetic field opens and closes the reed contact switch.
The appliance electronics determine the volume of water which has flowed in
based on the switching pulses of the reed contact switch.