The Omron 61F-GP-N8 230VAC is a conductive level controller from the 61F series, configured as a High/Low Level type. It runs on a 230VAC supply and switches a SPDT (2 Form C) relay rated at 3A @ 250VAC. The sensitivity adjustment spans 0 to 4 kΩ, and the control distance to the sensor electrodes can reach up to 1 km — enough for a remote tank farm or a deep well pit.
Socket-mount via an 8-pin octal base (plug-in termination style). The 0-4 kΩ sensitivity range means it detects conductive liquids — water, weak acids, caustic solutions — but not non-conductive media like oils or solvents.