Transducer with test button. Type-approved together with the level probes LS 300 EU, LS 300 FU or LS 300 ESPU as part of an overfill prevention system. The transducer supplies the level probe via an intrinsically safe circuit, evaluates the change in resistance of the PTC thermistor, continuously checks the PTC thermistor operation and monitors the system (power outage, short circuit, line interruption, etc.). Negative results cause the overfill prevention system to respond. The additional alarm unit ZAG 01 can also be connected.
The overfill prevention system must be set up in such a way that the filling process is stopped or visual and audible alarms are triggered when the maximum permissible level is reached. The transducer must be installed outside of the hazardous area.