Features: This flow switch is an automatic element that controls flow in pipes, which can be used on water treatment system, central air-conditioning, water cooled chiller and relative industries. Applicable fluid includes water, ethylene glycol,oil or other liquid not classified as hazardous or corrosive. Flow control value is adjustable, repeat action point is stable. for Protection grade is IP54; the contactor life is up to 100,000 times. When flow rate exceeds set value, fluid drives blade and micro switch, the SPDT contact can connect a circuit and disconnect other circuit. It can not be used when fluid temperature drops below freezing point. Specifications: Output Form: Micro switch SPDT output Micro Switch: 15A(max.), 250VAC/for DC Model:HFS-15/ HFS-20/ HFS-25 Thread:R1/2 R3/4 R1 Fluid: Water, oil Fluid Temperature: 1~100 Max. Pressure: 10bar IP Grade: IP54 Package Includes: 1x Flow Switch & 1 x set Paddles