ABB CM-ENS.23S Liquid level monitoring relay 1c/o, sensitivity 0.1-1000kOhm 1SVR730850R2200The CM ENS. 23S belongs to the CM liquid level monitoring relay range. It operates with a rated control supply voltage of 110 130 V AC and 220 240 V AC and has a 1 c o (SPDT) output with contacts rated at 250 V 4 A. It monitors liquid levels of conductive fluids and protects pumps against dry running or tanks against overflow. The working principle as well as the sensitivity can be selected via front face potentiometers. Several electrodes and a