61F-GP-N Level Controller – DIN Rail Mount, 24 V dc. 24Vdc supply allows operation via batteries in locations without AC power supply. Output action can be reversed allowing the same output wiring to be used for either supply or drainage applications. Adjustable sensitivity, with an operating resistance range of 0 to 100 kΩ, allows use in wide variety of liquids. Transistor open-collector output version can be directly connected to PLC input.