The Omron 61F-GP-NH AC24 is a conductive-type level controller from the 61F series, designed to detect high or low liquid levels using electrode probes. It operates on a 24VAC supply and switches a SPDT relay (2 Form C) rated for 3A at 250VAC. The sensitivity adjustment range of 10kOhm to 40kOhm lets you tune detection for different liquid conductivities — lower resistance for more conductive liquids like tap water, higher for less conductive ones like distilled water or certain chemicals. That adjustability is what makes this part a field-fit choice rather than a fixed-threshold device.
Socketable with an 11-pin octal base — common footprint that drops into a panel or enclosure socket. The plug-in termination means you can swap the controller without rewiring the base, which matters for MRO spares or line-down swaps. Maximum distance from controller to sensor is 50m, so the electrode probes can be mounted remotely in a tank or sump while the controller sits in the control cabinet.