An optic LED produces infrared light that is directed down the probe. When dry, the light is reflected through the probe’s conical tip and is sensed by the photodetector. When the probe tip is wet, the light at the photodetector produces a change in the output.

LEVELITE offers self-contained level switches as well as electro optic and fiber optic level systems. Electro optic probes are designed for general purpose areas and fiber optic probes for hazardous areas. These probes are used in conjunction with a universal controller, which can be used for level alarms or pump control. The universal controller has adjustable time delay and field selectable “fail-safe” settings.