PlumbingModel Number: DN40Function : Sensor , flow rate controlFlow rate : 5~200L/minFlow Pulse: F(Hz)=(0.45xQ) +/-3% Q=L/min1L water= 27PulseMax. Working Current : 15mA (DC5 V)Min. Working Voltage: DC 4.5VWorking Voltage:DC 5V~24VLoad Capacity: =10 mA (DC 5 V)Operating Working Temperature : -25 Degree centigrade to +80 Degree centigradeLiquid Temperature: 85 CelsiusAccuracy : 3~5%Working environmental : water , liquid, light oilcolour:blackMaterial:plasticsize:Thread size : Male 1 1/2 inchSize:L 92x OD46 X1.5 inchPackage Contents:1 * Water flow sensorOnly the above package content, other products are not included.Note: Light 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.