The Omron 61F-HSL AC220 is a High/Low Level controller from the 61F series, running on a 220VAC supply. It detects liquid level through electrode resistance, with adjustable sensitivity from 0 to 5 MOhm — meaning you can tune it for conductive liquids like water or for higher-resistance media like某些 chemicals or slurries. The SPDT (2 Form C) relay output switches up to 5A at 220VAC, so it directly drives a pump contactor or alarm without an interposing relay.
Socketable with an 8-pin octal base — mounts to a standard DIN-rail socket or panel-mount octal socket. The plug-in design means a line-down swap takes seconds: pull the old unit, plug in the spare, no re-wiring. Termination style is Plug In, 8 Pin (Octal), so verify your socket matches the pinout before committing the BOM line.