: Plumbing Model Number: DN40 Function : Sensor , flow rate control Flow rate : 5~200L/min Flow Pulse: F(Hz)=(0.45xQ) +/-3% Q=L/min 1L water= 27Pulse Max. Working Current : 15mA (DC5 V) Min. Working Voltage: DC 4.5V Working Voltage:DC 5V~24V Load Capacity: =10 mA (DC 5 V) Operating Working Temperature : -25 Degree centigrade to +80 Degree centigrade Liquid Temperature: 85 Celsius Accuracy : 3~5% Working environmental : water , liquid, light oil colour:black Material:plastic size:Thread size : Male 1 1/2 inch Size:L 92x OD46 X1.5 inch Package Contents: 1 * Water flow sensor Only 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.