The Omron 61F-G2P AC100 is a High/Low Level controller from the 61F series, designed to monitor and control liquid levels in tanks, reservoirs, or process vessels. It operates on a 100VAC supply and uses two relay outputs — one SPST-NO (1 Form A) and one SPDT (1 Form C) — to trigger alarms or actuate pumps and valves. The sensitivity range of 0 to 4kOhm lets you set the detection threshold for conductive liquids, and the control-to-sensor distance can reach 1km, so the controller can sit in a panel far from the tank.
The 5A @ 200VAC contact rating on the relays means it can directly switch small pumps, solenoid valves, or alarm indicators up to that load — no intermediate contactor needed for fractional-horsepower motors or resistive loads. The 0-4kOhm sensitivity range covers most conductive liquids (water, weak acids, coolants); adjust the threshold via the front-panel potentiometer to avoid false triggers from foam or sediment. The 1km maximum distance between controller and sensor electrodes means the 61F-G2P can be mounted in a central MCC or panel while the probes sit at a remote sump or tank.
Mounting and termination
Socketable mounting with a 15-pin octal plug-in base — mates to a standard 8- or 11-pin relay socket (e.g., Omron PYF-08 or similar). The octal pinout is common across the 61F family, so swapping a failed unit takes seconds without rewiring. Termination style is plug-in, 15 pin (octal), meaning the base stays on the DIN rail or panel and the controller pulls straight off.