Liquid Flow Switches

Our liquid flow switches are available in a wide range of designs for coolants, fuel, oil or hydraulic flow applications, and their service life is a robust 75,000 cycles.

Need a switch?  Fill out our switch inquiry form.

Aerospace Liquid Flow Switches


Liquid Flow Switch 45H-F

Note: Product image shown represents just one of the many envelope options we can offer. We can design a custom envelope to fit your needs.

System to 250 PSI
Proof to 375 PSI
Burst Not applicable
Actuation  0.25 GPM to 30 GPM
Deadband 12% to 40% of actuation set point
Electrical Hermetically sealed SDPT or DPTP,
2 mA TO 7 A Res @ 5-32 VDC
Environmental Ambient conditions
Temperature -65°F (-54°C) to 180°F (82°C)
Vibration 5 to 2000 Hz up to 20 g’s
Shock 25 g’s
Service Life 75,000 cycles
Weight 4 to 24 oz. (approx.)


Wide range of designs available for coolants, fuel, oil or hydraulic flow applications. High-efficiency venturi or orifice and negative rate disc spring sensing mechanism ensures low pressure loss and accurate adjustable flow settings. Aluminum, brass or stainless steel construction.

Switch Inquiry

Please contact us to discuss your switch needs so we can determine how we can best address them with our cutting-edge technology.

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