The water flow sensor is easy to clean, easy to install, wear-, and has a long service life. Medium used:water, less than equal 60 voltage:DC5V Rated voltage/current:DC5V, less than equal 10mA Insulation resistance: 100 MR Product Name:Water Flow Sensor Electrical strength:AC500V, 50HZ Output voltage: When the rated voltage is less than DC5V, the high level is above 0.2V and the low level is below 0.2V When the rated voltage is or equal to DC5V: the high level is above 0.5V, and the low level is below 0.5V Pulse duty cycle:50% Pressure resistance performance:less than equal 1.2Mpa Flow range:0.25-2.5L/min 1. To prevent particles and debris from entering the sensor, a filter screen must be installed at the inlet of the sensor; 2. The water flow sensor should be installed inside the equipment or indoors. Please do not expose the sensor to harsh environments such as outdoor, humid, and high temperatures for a long time 3. Please do not use the water flow sensor under vibration or shaking, otherwise it affect the measurement accuracy of the water flow sensor 4. When magnetic materials or materials that generate magnetic force on water flow sensors approach them, their characteristics may change. 5. Do not disassemble the water flow sensor without authorization to prevent damage. Due to different product batches, the appearance , which does not affect the use. Colour:As Shown Material:Plastic Package Contents: 5 * Water flow sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.