Rated operating voltage:DC4.5 5-24VMaximum operating current:15mA(DC5V)Flow range:2-100L/minOperating temperature range:80Pulse characteristics:f=1.0*Q (F: frequency,Q:L/min)Type:Turbine flowmeterWater pressure:1.75MpaVoltage:DC3.5-24VCaution:1:No severe impact or chemical attack is permitted2:Do not throw or bump3:Press the arrow on the product to install4:Medium temperature should not exceed 80C. Only weak acid and water concentration of the same liquid Note:Red IN :PositiveYellow OUT: Signal output lineBlack GND:Negative poleFrequency calculation = Constant 1 * Unit flow rate (L / min) * Time (seconds)DIY Supplies: PlumbingCoupling Type: Male BSPT ThreadType: Turbine flowmeterFeature: Hall FlowmeterWater pressure: Low 1.75MpaLoad capacity: Low 10mASize:114*60*48mmColor: BlackMaterial: PlasticPackage 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.