The Omron 61F-GP-NR-AC100 is a High/Low Level liquid level controller from the 61F series, running on a 100VAC supply. It uses a two-wire or three-probe sensing arrangement with a sensitivity range of 0 to 2 kOhm, making it suitable for conductive liquids in tanks or reservoirs where you need both high and low level detection. Output is via a relay with a contact configuration of SPST-NO (1 Form A) and SPDT (1 Form C), rated at 3A at 250VAC. The control-to-sensor distance can extend up to 800 meters, which gives flexibility for remote tank monitoring.
Socketable with an 11-pin octal base — mates to a standard relay socket, so panel wiring is straightforward. Termination style is plug-in, meaning you can swap the controller without disturbing the field wiring.