The Omron 61F-I AC100/200 is a High/Low Level controller from the 61F series, designed for conductive liquid level sensing in tanks, sumps, and process vessels. It operates on a 100/200VAC supply and provides relay output switching up to 5A at 220VAC, making it suitable for direct control of pumps, valves, or alarms. Sensitivity is adjustable from 0 to 4kOhm, which covers most conductive liquids including water, weak acids, and alkaline solutions. The 1km maximum distance between controller and sensor probe allows remote mounting away from the vessel.
Mounting and Termination
Chassis mount with screw terminals — no DIN-rail adapter, so plan panel space for a dedicated mounting footprint.
Key Ratings in Context
The SPDT (2 Form C) contact arrangement gives one normally-open and one normally-closed set, which can drive a pump fill/empty sequence or a high/low alarm independently. The 5A at 220VAC contact rating handles small motor starters or pilot relays directly; for larger loads, interpose a contactor.