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Type: HFS-25S / SS, HFS-20S / SS, HFS-15S / SS

(Stainless Steel paddle)



- The paddle type SPDT HFS series are designed to provide excellent performance where accuracy, reliability, and rugged construction (IP54) are required used in liquid flow lines carrying water or any fluid neither harmful to brass and prosphor bronze nor classified as a hazardous fluids.

- They can be wired to close one circuit and open a second circuit when

liquid flow either exceeds or drops below the adjusted flow rate.

- The HFS series are recommended for liquid pressure and temperature as mentioned below and must not be used on lines carrying liquids below 0 degree C.

- These series may be used on liquids with high salt or chlorine content but is not for use in hazardous atmospheres.

- They may be also used outdoors but must be protected from weather or splashing water.

- All series HFS flow switches are designed for use only as operating controls.

- Where an operating control failure would result in personal injury and/or loss of property, it is the responsibility of user to add safety devices that protect against, or supervisory systems that warn of control failure.



Operating Pressure


10kgf/cm² (1MPa)


Withstand Pressure


17.5Kgf/cm² (1.75MPa)


Insulation Resistence


Over 100Ω, DC500VM


Withstand Voltage




Contact Point Life


1000K Cycle


Bellows Life


500K Cycle


Temperature of Fluid


Max 100°C (212°F)


Body Size


1"(HFS-25), 3/4"(HFS-20), 1/2"(HFS-15)




- See catalog


Download:  CATALOG 

Công tắc dòng chảy inox HFS-15S / SS, HFS-20S / SS, HFS-25S / SS

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