Conductivity Level Switch Model 501

  • Mounting​
    On DIN-rail 
  • Supply​
    115/230 V AC ±10%, app. 4VA
  • Temperature range​
    - 20 … +60 oC
  • Relay output​
    Voltage-free switch, max. 250V, 4A resistive, 1A inductive
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The Conductivity Level Switch type 501 is simple and price competitive system for the control of  levels. The system includes a transmitter and various level electrodes.

Conductivity Level Switch Model 501

The level switch sends an alternating voltage to the electrodes. When the liquid contacts the electrodes, the current running between these is amplified and the output relay is activated. Two electrodes can be connected to the unit for the detection of one level, or three electrodes can be connected for the detection of two levels; one for start and one for  stop. In cases where the liquid is in a conductive tank or where a metal pipe is in constant contact with the liquid, it is only necessary to use one or two electrodes.

The Electrode Control 501 is used for the control of e.g. a pump or for detecting high or low levels and for a level alarm.