Frequency: F = 4.8 * Q (L / Min) voltage output of the premium: 3.5-24VDC a liter of water flow after output 288 Flow range: 1-60L/min It can be used for:Apply to food, credit card machines, water vending machines, and other flow measurement devices Lowest rated operating voltage: DC4.5 The maximum operating current: 15 mA (DC 5V) Operating voltage range: DC 5 ~ 24 V Load capacity: Less than or to10 mA (DC 5V) Operating temperature range: Less than or to80 Operating humidity: 35% ~ 90% RH (no condensation state) Allow pressure less pressure: 1.75Mpa Storage temperature: -25 ~ + 80 Storage humidity: 25% ~ 95% RH Colour: Black Material: ABS Package Included:1* DN25 Water Flow Sensor Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.