KP Series low cost Leak Detect Sensor


These units usually sit in a drip pan or similar location where people want to know if there is a leak. If they end up in the thinnest pool of liquid they will alarm. They use a leak detector looking at an LED and if that light path gets altered at all then it knows there is a liquid there. With that, it will detect any liquid as long as it is not exposed to excessive high or low temperatures.

Please note that these units are not rated to operate in a hazardous, potentially explosive environment.

Technical Specifications

Detection method

Infrared Photo-refraction


Transistor NO or NC


12 – 24VDC

Response time

< 1 sec (DI water)

Current Consumption

25mA Max


Normal operation – Green LED on, Red LED off

Detection – Red LED on, Green LED off

Operating temperature

- 10 to 60°C

Material of construction

PP (Polypropylene)


shielded 2 conductor, PVC (polyvinyl chloride)

2 meter length standard


+: red

-: shield

Signal: white

diagram of a KP series liquid leak detection sensor

As a liquid leak detector supplier, Daitron carries a selection of liquid leak sensors, including our LUP series and TFP series leak detectors, that offer the functionality and reliability needed in a liquid monitoring component.