Carlo Gavazzi Conductive Sensor Level Controller, 2-Point Level Charging/Discharging, Sensitivity Adjust 5K-150K Ohm, SPDT, Plug-In, Supply: 24VAC. µ-Processor based level controller for liquids with a wide sensitivity range (like sewage water, chemicals, salt water etc.). Max./min. control of charging/discharging. The sensitivity is adjustable by means of the potentiometer. 1 x 8A SPDT relay output.