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 Instruments V6EPB-B-D-4-B
    Dwyer Instruments V6EPB Flotect Mini-Size Flow Switch Brass upper and lower body
    Order #: V6EPB-B-D-4-B
    Mfg #: V6EPB-B-D-4-B
    Availability: In stock
    $467.45
    Flotect Mini-Size Flow Switch Brass upper and lower body Learn More
  2. Dwyer AFS-251 Flow switch, gases, 18 AWG, 24"
    Dwyer Instruments AFS-251 Flw swtch, gases, 18 AWG, 24" polymeri, brss pstn brss hsng
    Order #: AFS-251
    Mfg #: AFS-251
    Availability: Ships in 3-4 weeks
    $1,560.75
    Flw swtch, gases, 18 AWG, 24" polymeri, brss pstn brss hsng Learn More
  3. Dwyer Instruments V6EPS-S-S-3-S
    Dwyer Instruments V6EPS-S-S-3-S Flotect Mini-Size Flow Switch SST upper and lower body
    Order #: V6EPS-S-S-3-S
    Mfg #: V6EPS-S-S-3-S
    Availability: Ships in 3-4 weeks
    $569.95
    Flotect Mini-Size Flow Switch SST upper and lower body Learn More
  4. Dwyer Instruments V6EPB-B-S-LF
    Dwyer Instruments V6EPB Flotect Mini-Size Flow Switch Brass upper and lower body
    Order #: V6EPB-B-S-LF
    Mfg #: V6EPB-B-S-LF
    Availability: Ships in 3-4 weeks
    $402.50
    Flotect Mini-Size Flow Switch Brass upper and lower body Learn More
  5. Dwyer Instruments V10
    Dwyer Instruments V10 Flotect Mini-Size Flow Switch Brass, normally open or closed
    Order #: V10
    Mfg #: V10
    Availability: Ships in 3-4 weeks
    $88.75
    Flotect Mini-Size Flow Switch Brass, normally open or closed Learn More
  6. Dwyer Instruments V6EPB-B-S-1-B
    Dwyer Instruments V6EPB-B-S-1-B Flotect Mini-Size Flow Switch Brass upper and lower body
    Order #: V6EPB-B-S-1-B
    Mfg #: V6EPB-B-S-1-B
    Availability: Ships in 3-4 weeks
    $291.20
    Flotect Mini-Size Flow Switch Brass upper and lower body Learn More
  7. Dwyer Instruments P2-11
    Dwyer Instruments P2-11 Series P2 Flow Switch Actuation set point .05 GPM
    Order #: P2-11
    Mfg #: P2-11
    Availability: Ships in 3-4 weeks
    $152.15
    Series P2 Flow Switch Actuation set point .05 GPM Learn More
  8. Kobold Instruments LPS-1100P
    Kobold Instruments LPS-1100P Air Flow Switch
    Order #: LPS-1100P
    Mfg #: LPS-1100P
    Availability: Ships in 3-4 weeks
    $146.00
    Air Flow Switch Learn More
  9. Dwyer AFS-232 Flow switch, gases, 1/2" NPT conduit
    Dwyer Instruments AFS-232 Adjustable Flow Switch for Gases,1/2"NPT Conduit Conn.
    Order #: AFS-232
    Mfg #: AFS-232
    Availability: Ships in 3-4 weeks
    $1,073.30
    Adjustable Flow Switch for Gases,1/2"NPT Conduit Conn. Learn More
  10. Dwyer Instruments TDS222
    Dwyer Instruments TDS222 Thermal Dispersion Flow Switch PVDF wetted parts, 4.5" length
    Order #: TDS222
    Mfg #: TDS222
    Availability: Ships in 3-4 weeks
    $600.00
    Thermal Dispersion Flow Switch PVDF wetted parts, 4.5" length Learn More
  11. Dwyer Instruments TDS212
    Dwyer Instruments TDS212 Thermal Dispersion Flow Switch PVDF wetted parts, 3.0" length
    Order #: TDS212
    Mfg #: TDS212
    Availability: Ships in 3-4 weeks
    $680.00
    Thermal Dispersion Flow Switch PVDF wetted parts, 3.0" length Learn More
  12. Dwyer Instruments TDS122
    Dwyer Instruments TDS122 Thermal Dispersion Flow Switch PP/PPS wetted parts 4.5" length
    Order #: TDS122
    Mfg #: TDS122
    Availability: Ships in 3-4 weeks
    $450.00
    Thermal Dispersion Flow Switch PP/PPS wetted parts 4.5" length Learn More
  13. Dwyer Instruments TDS112
    Dwyer Instruments TDS112 Thermal Dispersion Flow Switch PP/PPS wetted parts 3.0" length
    Order #: TDS112
    Mfg #: TDS112
    Availability: Ships in 3-4 weeks
    $442.70
    Thermal Dispersion Flow Switch PP/PPS wetted parts 3.0" length Learn More
  14. 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
    Availability: Ships in 3-4 weeks
    $497.85
    Series GVS Globe Valve Switch Actuation set pt 2.0-8.0 GPM Learn More
  15. Dwyer Instruments P2-15
    Dwyer Instruments P2-15 Series P2 Flow Switch Actuation set point .42 CFM
    Order #: P2-15
    Mfg #: P2-15
    Availability: Ships in 3-4 weeks
    $152.15
    Series P2 Flow Switch Actuation set point .42 CFM Learn More
  16. Dwyer Instruments V8-WP
    Dwyer Instruments V8-WP Flotect Vane Operated Flow SW with weatherproof enclosure
    Order #: V8-WP
    Mfg #: V8-WP
    Availability: Ships in 3-4 weeks
    $150.50
    Flotect Vane Operated Flow SW with weatherproof enclosure Learn More
  17. Dwyer Instruments V6EPS-S-S-6-S
    Dwyer Instruments V6EPS-S-S-6-S Flotect Mini-Size Flow Switch SST upper and lower body
    Order #: V6EPS-S-S-6-S
    Mfg #: V6EPS-S-S-6-S
    Availability: Ships in 3-4 weeks
    $920.00
    Flotect Mini-Size Flow Switch SST upper and lower body Learn More
  18. Dwyer Instruments V6EPS-S-S-5-S
    Dwyer Instruments V6EPS-S-S-5-S Flotect Mini-Size Flow Switch SST upper and lower body
    Order #: V6EPS-S-S-5-S
    Mfg #: V6EPS-S-S-5-S
    Availability: Ships in 3-4 weeks
    $857.00
    Flotect Mini-Size Flow Switch SST upper and lower body Learn More
  19. Dwyer Instruments V6EPS-S-S-4-S
    Dwyer Instruments V6EPS-S-S-4-S Flotect Mini-Size Flow Switch SST upper and lower body
    Order #: V6EPS-S-S-4-S
    Mfg #: V6EPS-S-S-4-S
    Availability: Ships in 3-4 weeks
    $754.00
    Flotect Mini-Size Flow Switch SST upper and lower body Learn More
  20. Dwyer Instruments V6EPS-S-S-2-S
    Dwyer Instruments V6EPS-S-S-2-S Flotect Mini-Size Flow Switch SST upper and lower body
    Order #: V6EPS-S-S-2-S
    Mfg #: V6EPS-S-S-2-S
    Availability: Ships in 3-4 weeks
    $485.00
    Flotect Mini-Size Flow Switch SST upper and lower body Learn More
  21. Dwyer Instruments V6EPS-S-S-1-S
    Dwyer Instruments V6EPS-S-S-1-S Flotect Mini-Size Flow Switch SST upper and lower body
    Order #: V6EPS-S-S-1-S
    Mfg #: V6EPS-S-S-1-S
    Availability: Ships in 3-4 weeks
    $401.00
    Flotect Mini-Size Flow Switch SST upper and lower body Learn More
  22. Dwyer Instruments V6EPS-S-D-6-S
    Dwyer Instruments V6EPS-S-D-6-S Flotect Mini-Size Flow Switch SST upper and lower body
    Order #: V6EPS-S-D-6-S
    Mfg #: V6EPS-S-D-6-S
    Availability: Ships in 3-4 weeks
    $986.50
    Flotect Mini-Size Flow Switch SST upper and lower body Learn More
  23. Dwyer Instruments V6EPS-S-D-5-S
    Dwyer Instruments V6EPS-S-D-5-S Flotect Mini-Size Flow Switch SST upper and lower body
    Order #: V6EPS-S-D-5-S
    Mfg #: V6EPS-S-D-5-S
    Availability: Ships in 3-4 weeks
    $890.50
    Flotect Mini-Size Flow Switch SST upper and lower body Learn More
  24. Dwyer Instruments V6EPS-S-D-3-S
    Dwyer Instruments V6EPS-S-D-3-S Flotect Mini-Size Flow Switch SST upper and lower body
    Order #: V6EPS-S-D-3-S
    Mfg #: V6EPS-S-D-3-S
    Availability: Ships in 3-4 weeks
    $614.50
    Flotect Mini-Size Flow Switch SST upper and lower body Learn More
  25. Dwyer Instruments V6EPS-S-D-2-S
    Dwyer Instruments V6EPS-S-D-2-S Flotect Mini-Size Flow Switch SST upper and lower body
    Order #: V6EPS-S-D-2-S
    Mfg #: V6EPS-S-D-2-S
    Availability: Ships in 3-4 weeks
    $551.50
    Flotect Mini-Size Flow Switch SST upper and lower body Learn More
Showing 1-25 of 50
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