The sensor has been designed to detect the presents of oil or any non-conductive liquid including fuel oil, diesel etc. and energise an internal relay to provide a signal to existing alarm systems, Building Management Systems or SMS messaging systems.

The sensor as standard includes a Stainless Steel floor mounting bracket and on request can be fitted with a wall mounted bracket.

The Sensor includes two liquid detectors one looking for conductive liquids (water) with the other looking for non-conductive liquids (fuel oil etc. ) using an optical sensor. The mode of operation for the optical sensor is the principle of total internal reflection. An LED and photo-transistor are housed in a plastic (Polysulfone) dome. When no liquid is present, light from the LED is internally reflected from the dome to the photo-transistor. When a liquid covers the dome, the effective refractive index at the dome-oil boundary changes allowing some light from the LED to escape. Thus the amount of light received by the photo-transistor is reduced indicating the presents of a liquid. The conductive sensor looks for water by using bi-directional DC in both sensors to stop electrolysis of the electrodes.