The Omron 61F-GP-NH AC120 is a High/Low Level controller from the 61F series, running on a 120VAC supply. Its SPDT (2 Form C) relay output switches loads up to 3A at 250VAC, which is enough for direct control of a small pump or valve pilot — no intermediate relay needed for most tank-level circuits.
Sensitivity and sensing range
The sensitivity adjustment covers 10kOhm to 40kOhm, letting you tune the detection threshold for the conductivity of the liquid — lower resistance for conductive fluids like water, higher for less conductive media. The controller can be placed up to 50m from the electrode sensor, which gives you flexibility in panel location relative to the tank.
Socketable design with an 11-pin octal plug-in base. The termination style means it drops into a standard octal relay socket — common across panel builds — so swapping a failed unit takes seconds without disturbing the wiring.
Listed as Active in production status. This is a mature, broadly stocked part in the 61F family — a fast mover for tank-level control across water treatment, process, and packaging lines.