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Conductivity Level Switch 501

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Product Description

The Conductivity Level Switch type 501 is a simple and price competitive system for the control of levels. The system includes a transmitter for DIN-rail mounting and various level electrodes

Special Features

• Price competitive and reliable system for the control of level in conductive liquids

• The amplifier is easy to mount on aDIN-rail

• The electrodes are delivered for suspension in cable and for mounting with 1” thread

• For mounting a special bracket is available, which can be mounted directly on the wall or in combination with MJK modular fittings.


The transmitter generates an alternating voltage applied to the electrodes. When the liquid connects 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 e.g. a metal pipe is in constant contact with the liquid, it is only necessary to use one respectively two electrodes


Part numbers 202820 (230 V AC), 209820 (115 V AC) 

Dimensions 86 x 52,5 x 58 mm (hxwxd)

Mounting On DIN-rail

Supply 115/230 V AC ±10%, app. 4VA

Temperature range - 20 … +60 oC

CE approvals EN61000-6-1, EN61000-6-3

Enclosure IP22

Input From level electrodes

Sensitivity Min.: 100 mA Max.: 1mA

Relay output Voltage-free switch, max. 250V, 4A resistive, 1A inductive

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