HFS-20 or 15 or 25 R3 or 4 Liquid Water Oil Sensor Control Automatic Paddle Flow Switch FG05 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. 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 or DC Model:HFS-15 or HFS-20 or HFS-25 Thread:R1 or 2 R3 or 4 R1 Fluid: Water, oil Fluid Temperature: 1-100 Max. Pressure: 10bar IP Grade: IP54 Package Includes: 1x Flow Switch and 1 x set Paddles Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.