Function: the water flow sensor is mainly composed of plastic valve body, rotor assembly and Hall current sensor can use for water heaters, credit card machine, water vending machine, flow measuring device. Stainless steel rotor shaft inlaid, durable handy sealing ring with upper and lower force structure never leak vertically mounted, should not exceed 5 degrees of inclination. Medium temperature should not exceed 120°c specification: material: plastic/monocrystalline color: transparent working voltage: DC 5 - 15V maximum working current: 15mA (DC 5V). Operating Voltage Range: DC 5 - 15V Load capacity: le; 10 mA (DC 5 V). Operating temperature: le; 80°C Operating Humidity Range: 35% - 90%RH (No Frost) Allowing Pressure: 1.75Mpa Pressure Storage Temperature: -25 - +80°C Save Humidity: 25%-95%RH Flow Range: 1-30L/min Insulation Resistance:gt; 100MOmega; accuracy (in 1 - 30L MIN): ± 10% pulse flow characteristic (5xQ): Q = L/Min ± 3% output pulse duty cycle: 50% ± 10% external threads: approx. 1/2" interface type: 1/2" (1/2" pipe) dimension: 54x29mm/2.13x1.14" (L x W) quantity: 1 pc. Note: 1. Transition: 1cm=10mm=0.39 inch 2. Please allow 0-3cm error due to manual measurement. Pls make sure you don't mind before you bid. 3. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Included: 1pc x Water Flow Sensor Switch