TRANSMITTERS
Transmitters send a 4-20 mA analogue output signal.
The sensor contains a series of reed contacts distanced one another by a 10 or 20 mm pitch. The magnet mounted in the float closes the contact reeds in succession, each of them is connected to a resistance, and the resistive value will be converted into an analogue signal.
ESL4-20 mA analogue level sensor with 2 programmable digital thresholds
