DFRobot SEN0370 Non-contact Liquid Level Sensor is specially designed to detect the liquid level of all sorts of non-metal small diameter pipes (outer diameter D≤10mm). This sensor features a status indicator and adjustable sensitivity. The status feedback of the sensor can be given in real-time. The non-contact liquid level sensor comes with a 4-pin adaptor that can directly collect the digital signal. Also, this adapter makes it convenient for connecting with Arduino or other main controllers. This liquid level sensor can be widely used in the liquid detection of water dispensers, small pipes, and perfusion tubes.