The Omron 61F-GP-N8HY 110VAC is a High/Low Level controller from the 61F series, designed for conductive liquid level detection in tanks, reservoirs, and process vessels. It operates on a 110VAC supply and provides a relay output with SPDT (2 Form C) contacts rated at 3A @ 250VAC. The sensitivity range of 15kΩ to 70kΩ allows adjustment for different liquid conductivities, and the unit can sense up to 50m from the electrode. Termination is via an 8-pin octal plug-in base, making it socket-mountable for quick replacement in a panel.
The 15kΩ–70kΩ sensitivity range means this controller can be tuned to detect liquids with varying conductivity — from relatively pure water (higher resistance) to conductive process fluids (lower resistance). The High/Low Level function provides two set points: a high-level alarm or pump-stop and a low-level refill or alarm, using a single electrode pair or three-electrode probe. The 50m maximum distance between controller and sensor allows the electronics to be mounted remotely from the tank, which is useful in hazardous or space-constrained areas. The 110VAC supply and octal base are standard for panel-mount level controls in this class, so replacement in an existing socket is straightforward — but verify the wiring scheme against the original unit, as pin assignments may differ between manufacturers.
Deployment Context
This controller is typically deployed in water and wastewater treatment, chemical dosing, and industrial process tanks where conductive liquid level detection is acceptable. The socketable, plug-in design suits DIN-rail or panel-mount enclosures where quick replacement without rewiring is a maintenance requirement.