31967-W Magnetic Level Indicators Standard Transmitter

The transmitter is mounted outside of the float chamber opposite to the indication rail. The magnet inside the float activates the reed switches in the transmitter, depending on the level of liquid in the float chamber, thereby changing the effective value of a resistance network. 

The resulting voltage output is converted by an internal electronic circuit to a 4-20 mA signal. If the liquid level rises above the measuring range of the transmitter (30 mm) the output signal jumps to 115% (ca. 22.5 mA) and remains on that limit.