CMR ELECTRICAL Drip Tray Water Leak Detector for air conditioning or water pipe drip trays – Type DTS

The Drip Tray sensor utilizes the principle of total internal reflection to detect liquid presence. It incorporates an LED and phototransistor housed in a sturdy plastic (Polysulfone) dome. When no liquid is present, the LED light is internally reflected from the dome to the phototransistor. However, when a liquid covers the dome, the change in refractive index allows some light to escape. As a result, the amount of light received by the phototransistor decreases, indicating the presence of liquid.