Specification: Function: Sensor , flow rate controlFlow rate (test by oil high density liquid) : 30-3000L/HourFlow Pulse: F(Hz)=1.2ML/ P +/-1%Working Voltage:DC 7V~24Vnot less than 5Vdc WorkingLoad Capacity: =10 mA (DC 5 V)Operate pressure : Less than 1.2MpaOperating Working Temperature :-25 Degree centigrade to +70 Degree centigradeLiquid Temperature: 70Accuracy : at 30-3000L/hour is +/-1%, test liquid is .Working environmental : liquid, light oil, ....Cable wire : Red : + IN , Black :- GND , Yellow : signal output.Color: As ShownMaterial: plasticPackage Contents:1 x Gear flow meterOnly 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 +/- 1-3cm.