Non-contact Liquid Level Sensor (Open Collector Output)

This non-contact liquid level sensor can be triggered when the liquid level fall below the sensor attached to the outside surface of a non-metal container. Unlike traditional liquid level sensors, it does not need to be immersed into liquid. So, in this way, liquid will not be contaminated and the life of the sensor will not be reduced so fast because of the contact between liquid and sensors.The sensor is very sensitive and stable, and the output current is up to 50mA. You can use this switch to monitor the condition of your water machine or make a water-drinking reminder by attaching it to the surface of your cup.

This sensor works great from 5 to 24VDC. The output pin is an open collector meaning you will need a pull up resistor on the output pin. The open drain setup allows multiple sensors to be connected on a single input pin. If any of the sensors go off, the input pin will be pulled low.

Wiring:

• Brown: 5-24VDC supply
• Yellow: output
• Blue: GND
• Black: not connected

Features:

• Operating voltage: 5-24VDC
• Output current: 50mA
• Response time: 500 ms
• Adjustable sensitivity
• Detectable wall thickness: 1~13mm
• Waterproof performance: IP67