The Omron 61F-GPN-BT 24VDC is a high/low level controller from the 61F series, designed to detect and control liquid levels in tanks, reservoirs, or process vessels. It uses a solid-state output and operates on a 24VDC supply, with adjustable sensitivity from 0 to 100kOhm to accommodate different liquid conductivities. The socketable design with an 11-pin octal plug-in termination makes it easy to install and replace in control panels.
The adjustable sensitivity range of 0 to 100kOhm means this controller can be tuned to detect liquids with varying conductivity — from highly conductive water to less conductive fluids like oils or chemicals. The 100m maximum distance between the controller and the sensor probes allows placement in a central panel while the probes are located at a remote tank, which is common in large facilities. The solid-state output provides faster switching and longer life compared to mechanical relays, making it suitable for applications where cycling frequency is high or where maintenance access is limited. The 24VDC supply voltage fits standard industrial control voltages and simplifies integration with PLCs or other DC-powered controls.
This level controller is used in industrial and commercial liquid-level management — sump pump control, tank fill/empty, overflow prevention, and process level monitoring.