The Omron 61F-GL AC100/200 4KM is a high/low level controller from the 61F series, designed for conductive liquid level detection. It operates on a 100/200VAC supply and provides SPDT relay output with a contact rating of 5A at 220VAC. The sensitivity range of 0 to 0.7 kOhm means it triggers on the conductivity of the liquid, not on float position — suitable for water, weak acids, or other conductive fluids. The 4 km maximum distance between controller and sensor allows remote tank monitoring without a local amplifier.
Chassis-mount design with screw terminals — installs directly onto a panel backplate or inside a control cabinet. The SPDT (2 Form C) relay output switches pump contactors or alarms directly, eliminating an interposing relay for most loads up to 5A.