Flow Switches

We offer highly reliable flow switches that have been engineered to specifically monitor the presence or absence of liquid, gas, or air flow in a system. Our liquid flow switches are available in vane-operated, piston, and mechanically actuated designs. We have the instruments to protect pumps, motors and equipment from the effects of low or no flow conditions. Our compact flow switch models come in piston designs to deliver proven performance in air and pure water applications. Vane flow switches are available at Transcat with field adjustability, providing count-on protection against flow variation or the stoppage of fluids, gases and flowing solids. You’ll also find brass flow switches designed to manage high inline pressure. Our switch selection includes explosion-proof products from Dwyer Instruments that have proven their worth in pipelines.

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  1. Dwyer G9-21
    Dwyer Instruments G9-21 Globe Flow Switch actuation set point 0.75-4 GPM
    Order #: G9-21
    Mfg #: G9-21
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    Globe Flow Switch actuation set point 0.75-4 GPM Learn More
  2. Dwyer Instruments GVS-113
    Dwyer Instruments GVS-113 Series GVS Globe Valve Switch Actuation set pt 2.0-8.0 GPM
    Order #: GVS-113
    Mfg #: GVS-113
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    Series GVS Globe Valve Switch Actuation set pt 2.0-8.0 GPM Learn More
  3. Dwyer Instruments GVS-112
    Dwyer Instruments GVS-112 Series GVS Globe Valve Switch Actuation set pt 5.0-15.0 GPM
    Order #: GVS-112
    Mfg #: GVS-112
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    Series GVS Globe Valve Switch Actuation set pt 5.0-15.0 GPM Learn More
  4. Dwyer Instruments GVS-111
    Dwyer Instruments GVS-111 Globe Valve Switch actuation set point 1.0-6.0 GPM
    Order #: GVS-111
    Mfg #: GVS-111
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    Globe Valve Switch actuation set point 1.0-6.0 GPM Learn More
  5. Dwyer Instruments FS20700
    Dwyer Instruments FS20700 Flowmeter 1.0 to 7.0 GPM, 3/4" male NPT
    Order #: FS20700
    Mfg #: FS20700
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    Flowmeter 1.0 to 7.0 GPM, 3/4" male NPT Learn More
  6. Dwyer Instruments FS20400
    Dwyer Instruments FS20400 Flowmeter 0.5 to 4.0 GPM, 3/4" male NPT
    Order #: FS20400
    Mfg #: FS20400
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    Flowmeter 0.5 to 4.0 GPM, 3/4" male NPT Learn More
  7. Dwyer Instruments FS12810
    Dwyer Instruments FS12810 Flowmeter 4.0 to 28 GPM, 1" male NPT
    Order #: FS12810
    Mfg #: FS12810
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    Flowmeter 4.0 to 28 GPM, 1" male NPT Learn More
  8. Dwyer Instruments FS11610
    Dwyer Instruments FS11610 Flowmeter 1.0 to 16 GPM, 1" male NPT
    Order #: FS11610
    Mfg #: FS11610
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    Flowmeter 1.0 to 16 GPM, 1" male NPT Learn More
  9. Dwyer Instruments FS10410
    Dwyer Instruments FS10410 Flowmeter 0.5 to 4.0 GPM, 1" male NPT
    Order #: FS10410
    Mfg #: FS10410
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    Flowmeter 0.5 to 4.0 GPM, 1" male NPT Learn More
  10. Dwyer Instruments FS-2-VANE
    Dwyer Instruments FS-2-VANE Replacement Vane Assembly
    Order #: FS-2-VANE
    Mfg #: FS-2-VANE
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    Replacement Vane Assembly Learn More
  11. Dwyer Instruments P8-15
    Dwyer Instruments P8-15 High Pressure Brass Flow Switch Actuation set point 2.0 GPM
    Order #: P8-15
    Mfg #: P8-15
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    High Pressure Brass Flow Switch Actuation set point 2.0 GPM Learn More
  12. Dwyer Instruments P8-14
    Dwyer Instruments P8-14 High Pressure Brass Flow Switch Actuation set point 1.5 GPM
    Order #: P8-14
    Mfg #: P8-14
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    High Pressure Brass Flow Switch Actuation set point 1.5 GPM Learn More
  13. Dwyer Instruments P8-13
    Dwyer Instruments P8-13 High Pressure Brass Flow Switch Actuation set point 1.0 GPM
    Order #: P8-13
    Mfg #: P8-13
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    High Pressure Brass Flow Switch Actuation set point 1.0 GPM Learn More
  14. Dwyer Instruments P8-12
    Dwyer Instruments P8-12 High Pressure Brass Flow Switch Actuation set point 0.50 GPM
    Order #: P8-12
    Mfg #: P8-12
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    High Pressure Brass Flow Switch Actuation set point 0.50 GPM Learn More
  15. Dwyer Instruments P8-11
    Dwyer Instruments P8-11 High Pressure Brass Flow Switch Actuation set point 0.25 GPM
    Order #: P8-11
    Mfg #: P8-11
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    High Pressure Brass Flow Switch Actuation set point 0.25 GPM Learn More
  16. Dwyer Instruments P5-3
    Dwyer Instruments P5-3 P5 PVC Shuttle Flow Switch Actuation set point 2.0 GPM
    Order #: P5-3
    Mfg #: P5-3
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    P5 PVC Shuttle Flow Switch Actuation set point 2.0 GPM Learn More
  17. Dwyer Instruments P5-2
    Dwyer Instruments P5-2 P5 PVC Shuttle Flow Switch Actuation set point .5 GPM
    Order #: P5-2
    Mfg #: P5-2
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    P5 PVC Shuttle Flow Switch Actuation set point .5 GPM Learn More
  18. Dwyer Instruments P5-1
    Dwyer Instruments P5-1 P5 PVC Shuttle Flow Switch Actuation set point .5 GPM
    Order #: P5-1
    Mfg #: P5-1
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    P5 PVC Shuttle Flow Switch Actuation set point .5 GPM Learn More
  19. Dwyer Instruments P4-36
    Dwyer Instruments P4-36 P4 PPS Piston Flow Switch Actuation set point 1.5 GPM
    Order #: P4-36
    Mfg #: P4-36
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    P4 PPS Piston Flow Switch Actuation set point 1.5 GPM Learn More
  20. Dwyer Instruments P4-35
    Dwyer Instruments P4-35 P4 PPS Piston Flow Switch Actuation set point 1 GPM
    Order #: P4-35
    Mfg #: P4-35
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    P4 PPS Piston Flow Switch Actuation set point 1 GPM Learn More
  21. Dwyer Instruments P4-34
    Dwyer Instruments P4-34 P4 PPS Piston Flow Switch Actuation set point .75 GPM
    Order #: P4-34
    Mfg #: P4-34
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    P4 PPS Piston Flow Switch Actuation set point .75 GPM Learn More
  22. Dwyer Instruments P4-33
    Dwyer Instruments P4-33 P4 PPS Piston Flow Switch Actuation set point .5 GPM
    Order #: P4-33
    Mfg #: P4-33
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    P4 PPS Piston Flow Switch Actuation set point .5 GPM Learn More
  23. Dwyer Instruments P4-32
    Dwyer Instruments P4-32 P4 PPS Piston Flow Switch Actuation set point .25 GPM
    Order #: P4-32
    Mfg #: P4-32
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    P4 PPS Piston Flow Switch Actuation set point .25 GPM Learn More
  24. Dwyer Instruments P4-31
    Dwyer Instruments P4-31 P4 PPS Piston Flow Switch Actuation set point .1 GPM
    Order #: P4-31
    Mfg #: P4-31
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    P4 PPS Piston Flow Switch Actuation set point .1 GPM Learn More
  25. Dwyer Instruments P4-16
    Dwyer Instruments P4-16 P4 PPS Piston Flow Switch Actuation set point 1.5 GPM
    Order #: P4-16
    Mfg #: P4-16
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    P4 PPS Piston Flow Switch Actuation set point 1.5 GPM Learn More
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