Introtek's TLD Tank Level Detector is the most recent addition to the sensor array. The TLD features the most recent generation of pulse-type ultrasonic technology. Comes entirely sealed and potted, ...

This circuit is useful in liquids level or proximity detection. It operates detecting the distance from the target by reflection of an infra-red beam. It can safely detect the level of a liquid in a ...

This is a very simple liquid detector that use a relay to open an evacuation van. You can use it for water or any liquid that conduct electricity. Use any PNP transistor that can stand the relay ...