Alarm or pump control for controlling between two levels 3 electrode holders Modes: max detection, overfill (A) or min detection dry run protection (B) External LED switch status 3 electrode holders Selectable sensitivity; 100Ω to 300kΩ Integration time adjustable up to 20 secs 1m x 4mm diameter stainless steel electrodes need to be ordered separately (see stock no. 387-0385). These can be cut to length to suit application