The Omron 61F-GP-N2 220VAC is a High/Low Level conductivity-based level controller from the 61F series, operating on a 220VAC supply. It detects liquid level through electrode probes, switching when the resistance between probes falls within the 0 to 4kOhm sensitivity range. The socketable design with an 8-pin octal base means it plugs into a standard relay socket for quick replacement — no hardwiring the controller itself, which cuts downtime on a tank-level circuit.
The 0 ~ 4kOhm sensitivity range governs what probe resistance the controller treats as a 'wet' condition. If your tank probes see higher resistance (distilled water, long cable runs, or coated electrodes), the controller may not switch reliably. For typical tap water or wastewater applications this range covers the common conductivity band. The 220VAC supply is the control voltage, not the probe excitation — confirm your panel has 220VAC available for the controller coil. Socketable mounting with an 8-pin octal base means the controller is a drop-in replacement for existing 61F-series units or any panel wired for an octal-base level relay.