The Omron 61F-G3NH AC110/220 is a High/Low level controller from the 61F series, designed for tank-level monitoring and control in industrial fluid-handling systems. It operates on a 110/220VAC supply and provides three relay outputs with SPDT (2 Form C) contacts rated at 3A @ 200VAC — enough to drive small pumps, solenoid valves, or alarm indicators directly without an interposing relay. The sensitivity adjustment range of 10kOhm to 40kOhm lets you tune the detection threshold for different liquid conductivities — useful when switching between water, coolant, or chemical solutions without changing the probe assembly. The maximum sensor distance of 50m gives flexibility to place the controller away from the tank in a cleaner panel environment.
Mounting and integration
Snaps onto standard 35mm DIN rail — no panel cutout or mounting plate needed. Screw terminals accept up to 2.5 mm² stranded wire; strip length around 8 mm for a clean connection under the clamp. The -10°C to 55°C operating range covers most indoor industrial environments, though you'll want to keep it out of direct steam or washdown zones.