Features: It is used to measure the dynamic state of the liquid flowing through the pipeline, such as: water, ethylene, ethylene glycol and other liquids that have no corrosive effect on copper. When flow rate exceeds set value, fluid drives blade and micro switch, the SPDT contact can connect a circuit and disconnect other circuit. Flow control value is adjustable, repeat action point is stable. Protection grade is IP54, the micro switch contact life is up to 100,000 times Perfect for water treatment system, central air conditioning, water cooling unit. Specification:Model: HFS-20Switch type: SPDTMaterial: 304 stainless steel body, copper connector, phosphor bronze bellowsWeight: Approx.401g/ 14.1ozConnector: 3/4Max.working pressure: 1.0MPaAmbient temperature: 0~60℃Liquid temperature: -10~100℃Micro switch contact life: 1000000 timesMicro switch Voltage: 220VACMicro switch Current: 15APackage List:1 * Water Flow Switch3 * Paddle1 * User manualInstallation method:1. Open the flow switch2. The switch has been set at minimum flow rate. Turn the adjusting screw counterclockwise to increase the flow setting value.3. Press the target to check whether the micro switch can work normally. Excessive clockwise rotation of the adjusting screw may lead to the failure of the flow switch.4. After the installation, please press the lever of the flow switch several times to check. If there is no click sound, turn the adjusting screw counterclockwise until there is click sound.5. The adjustment screw of lacquer seal is only used for the first time to adjust the state of flow switch. Please do not change