The Omron 61F-G4NH AC110/220 is a conductive level controller from the 61F series, configured for High/Low Level detection — the type that triggers fill and empty cycles from two probe positions, not just a single high-alarm point. It runs on a dual-range supply of 110/220VAC, so it drops into panels wired for either common line voltage without a separate control transformer. Sensitivity is adjustable across 10kOhm to 40kOhm, which covers most water-based and light chemical conductive liquids; the 50m maximum distance between the controller and the sensing electrodes gives room to mount the unit in a central panel while the probes sit at a remote tank. Outputs are six relay contacts arranged as SPDT (2 Form C) and SPDT (3 Form C), rated at 3A at 200VAC — enough to drive small pumps, solenoid valves, or alarm indicators directly without an interposing relay.
Listed as Active in production. The 61F series is a mature, widely installed line — no imminent end-of-life notice on this variant.