Level probes of type series NK08 are used in connection with transistor control relays ER76 for automatic control of conductive liquids and regulation of liquid levels, as a pumps protected against dry running, condensate levels can be monitored. As soon as the liquid moistens the electrode, a conductive connection to the ground electrode is created, depending on the method of operation. The conductivity of the liquid must be at least 5 μS/cm. Contact with the conductive liquid sets and switches the output relay.
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