Frequency: Hz = (6*q-2)* Q =(l / Min) Voltage Output Of The Premium: 3.5-24vdc A Liter Of Water Flow After Pulse Output 358 Flow Range: 2-60l/min Inner Diameter/outer Diameter: 20mm/32.7mm Screw Length: 13mm 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 Equal To10 Ma (dc 5v) Operating Temperature Range: Less Than Or Equal To80 Operating Humidity: ~ Rh (no Condensation State) Allow Pressure Less Pressure: 1.75mpa Storage Temperature: -25 ~ + 80 Storage Humidity: ~ Rh Colour:black Material:abs Package Contents: 1 X Dn25 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