1、COMPACT SIZE: The water flow sensor is small in size and light in weight, easy to install and takes up less space, has a wide range of applications. 2、GOOD WATERPROOF: Hall element waterproof design, excellent material inlaid inside the impeller, wear resistant and durable, greatly prolong the service life. 3、3P CONNECTION: The water flow sensor is 3 wire design, the red wire is positive pole, the black wire is negative pole, and the yellow wire is a pulse signal. 4、USE ENVIRONMENT: The sensor flow range is 0.2-8L/min, with good pressure resistance, and the operating temperature does not exceed 80 degrees. 5、MULTIPLE USAGES: With G1/4in PE pipe interface, standard in size, widely used in water heaters, water dispensers, etc., can be used as a flow switch.