Flow monitoring, immersion sensor with integrated evaluation electronics, operating voltage 19.2.28.8 VDC, immersion sensor, sensor for liquid media, calorimetric function, adjustment via potentiometer, display via LED chain, protective insulation according to DIN 57106 Part 1 / VDE 0106 Part 1. The protective insulation is intended to prevent excessive contact voltages compared to earth potential from occurring on the surface of the device due to a fault (e.g. in the mains supply)., DC 3-wire, 19.2...28.8 VDC, normally open, PNP output, plug device, M12 x 1