Flow Switches - Dwyer

Flow switches are vital instruments in fluid systems that detect the presence or absence of flow. These devices ensure proper operation and prevent issues such as pump damage or system failure. Flow switches are employed in various industries to monitor and control the flow of liquids or gases, providing a reliable means of safeguarding equipment and optimizing fluid processes.

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The Dwyer - FS-100-050 is a Flow Switch for Threaded Plastic Piping featuring Liquid, 0.5 GPM Switch Point, 50 VA SPST, 3/4 ", NPT Female, ± 10 % Accuracy, PP, and 12 " (300mm) Wire L. Part of the FS-100 Series. Sold individually.

$115.18

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FSW-160 is a Flow Switch featuring Paddle, Heavy Duty, Liquid, 4 GPM to 500 GPM, 15 A SPDT, 1 ", NPT Male, ± 1 % Accuracy, 316 SS, 304 SS, Brass, and EPDM. Sold individually.

$255.22

Should ship between 01 Nov and 04 Nov

Subject to factory lead times

The Dwyer - FST-321-SPST is a Flow Switch featuring Thermal Dispersion, Gas, 1 FPS to 90 FPS, 1 A SPST Relay, N.O/N.C, Selectable, 3/4 " to 1-1/2 ", NPT Male, ± 5 % Accuracy, PP, PVDF, and 10 ' Wire L. Part of the FST-320 Series. Sold individually.

$360.50

Should ship between 04 Dec and 11 Dec

Subject to factory lead times

The Dwyer - FSW301 is a Flow Switch featuring Low Cost, Economical, Liquid, 4 GPM to 132 GPM, 26 VA SPST, 1/2 ", NPT Male, Brass, SS, PP, and Noryl. Part of the FSW300 Series. Sold individually.

$373.10

Should ship between 01 Nov and 04 Nov

Subject to factory lead times

The Dwyer - FST-212-SPST is a Flow Switch featuring Thermal Dispersion, Liquid, 0.04 FPS to 3 FPS, 1 A SPST Relay, N.O/N.C, Selectable, 3/4 " to 1-1/2 ", NPT Male, ± 5 % Accuracy, PVDF, and 10 " Wire L. Part of the FST-200 Series. Sold individually.

$566.90

Should ship between 04 Dec and 11 Dec

Subject to factory lead times

The Dwyer - FS-100-025 is a Flow Switch for Threaded Plastic Piping featuring Liquid, 0.25 GPM Switch Point, 50 VA SPST, 3/4 ", NPT Female, ± 10 % Accuracy, PP, and 12 " (300mm) Wire L. Part of the FS-100 Series. Sold individually.

$109.02

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FSW-25 is a Flow Switch featuring Trim-to-Size, Paddle, Liquid, 43 Centistokes, SPDT, 1 ", PT, ± 1 % Accuracy, 304 SS, and Aluminum. Sold individually.

$450.36

Should ship between 01 Nov and 04 Nov

Subject to factory lead times

The Dwyer - FST-221-SPST is a Flow Switch featuring Thermal Dispersion, Liquid, 0.04 FPS to 3 FPS, 1 A SPST Relay, N.O/N.C, Selectable, 2 " to 12 ", NPT Male, ± 5 % Accuracy, PP, PVDF, and 10 " Wire L. Part of the FST-200 Series. Sold individually.

$341.99

Should ship between 04 Dec and 11 Dec

Subject to factory lead times

The Dwyer - FSW-42A is a Flow Switch for 3 " to 10 " Pipe featuring Industrial, Liquid, 2 FPS to 15 FPS, 15 A SPDT, 1 ", NPT Male, Brass, 316 SS, Phosphor Bronze, and EPDM. Part of the FSW-40A Series. Sold individually.

$745.16

Should ship between 01 Nov and 04 Nov

Subject to factory lead times

The Dwyer - FSW304 is a Flow Switch featuring Low Cost, Economical, Liquid, 3.5 GPM to 4.4 GPM, 26 VA SPST, 1 ", NPT Female, and Brass. Part of the FSW300 Series. Sold individually.

$430.21

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FSW-41A is a Flow Switch for 1-1/2 " to 2-1/2 " Pipe featuring Industrial, Liquid, 2 FPS to 15 FPS, 15 A SPDT, 1 ", NPT Male, Brass, 316 SS, Phosphor Bronze, and EPDM. Part of the FSW-40A Series. Sold individually.

$745.16

Should ship between 01 Nov and 04 Nov

Subject to factory lead times

The Dwyer - FST-211-SPST is a Flow Switch featuring Thermal Dispersion, Liquid, 0.04 FPS to 3 FPS, 1 A SPST Relay, N.O/N.C, Selectable, 3/4 " to 1-1/2 ", NPT Male, ± 5 % Accuracy, PP, PVDF, and 10 " Wire L. Part of the FST-200 Series. Sold individually.

$326.67

Should ship between 04 Dec and 11 Dec

Subject to factory lead times

The Dwyer - FSW-30A is a Flow Switch featuring Non-Magnetic, Industrial, Water, 0.12 GPM to 8 GPM, 15 A SPDT, 1/2 ", NPT Female, Brass, 316 SS, Phosphor Bronze, and EPDM. Part of the FSW30 Series. Sold individually.

$854.90

Should ship between 01 Nov and 04 Nov

Subject to factory lead times

The Dwyer - FST1001R is a Flow Switch featuring Economical, Air, 0 FPM to 5000 FPM, 2 SPST N.O Relays, 1/4 ", Compression Fitting, ± 2 % Accuracy, 304 SS, 12 " Wire L, and Remote Probe. Part of the FST1000 Series. Sold individually.

$574.17$622.77

You save 8%
Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FS-100-250 is a Flow Switch for Threaded Plastic Piping featuring Liquid, 2.5 GPM Switch Point, 50 VA SPST, 3/4 ", NPT Female, ± 10 % Accuracy, PP, and 12 " (300mm) Wire L. Part of the FS-100 Series. Sold individually.

$115.18

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FSW-43A is a Flow Switch for 10 " to 48 " Pipe featuring Industrial, Liquid, 2 FPS to 15 FPS, 15 A SPDT, 1 ", NPT Male, Brass, 316 SS, Phosphor Bronze, and EPDM. Part of the FSW-40A Series. Sold individually.

$745.16

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FS-100-200 is a Flow Switch for Threaded Plastic Piping featuring Liquid, 2 GPM Switch Point, 50 VA SPST, 3/4 ", NPT Female, ± 10 % Accuracy, PP, and 12 " (300mm) Wire L. Part of the FS-100 Series. Sold individually.

$109.02

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FST1001A is a Flow Switch featuring Economical, Air, 0 FPM to 5000 FPM, 2 SPST N.O Relays, 1/4 ", Compression Fitting, ± 2 % Accuracy, 304 SS, 12 " Wire L, and Fixed Probe. Part of the FST1000 Series. Sold individually.

$504.58$547.28

You save 8%
Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FS-100-100 is a Flow Switch for Threaded Plastic Piping featuring Liquid, 1 GPM Switch Point, 50 VA SPST, 3/4 ", NPT Female, ± 10 % Accuracy, PP, and 12 " (300mm) Wire L. Part of the FS-100 Series. Sold individually.

$109.02

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FSW-42A-SS is a Flow Switch for 3 " to 10 " Pipe featuring Industrial, Liquid, 2 FPS to 15 FPS, 15 A SPDT, 1 ", NPT Male, Brass, 316 SS, Phosphor Bronze, EPDM, FKM, and PTFE. Part of the FSW-40A Series. Sold individually.

$1,179.12

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FSW-6212 is a Flow Switch featuring Thermal Dispersion, Liquid 0.09 FPS to 9.84 FPS, Gas 0.16 FPS to 49 FPS, 5 A SPDT, 3/4 ", NPT Male, ± 10 % Accuracy, 316 SS, and 2 " Insertion L. Part of the FSW-6000 Series. Sold individually.

$1,174.92

Should ship between 27 Nov and 04 Dec

Subject to factory lead times

The Dwyer - FSW303 is a Flow Switch featuring Low Cost, Economical, Liquid, 1.8 GPM to 2.4 GPM, 26 VA SPST, 3/4 ", NPT Female, and Brass. Part of the FSW300 Series. Sold individually.

$430.21

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FSW-40A is a Flow Switch for 1 " Pipe featuring Industrial, Liquid, 2 FPS to 15 FPS, 15 A SPDT, 1 ", NPT Male, Brass, 316 SS, Phosphor Bronze, and EPDM. Part of the FSW-40A Series. Sold individually.

$705.35

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FSW302 is a Flow Switch featuring Low Cost, Economical, Liquid, 0.9 GPM to 1.1 GPM, 26 VA SPST, 1/2 ", NPT Female, and Brass. Part of the FSW300 Series. Sold individually.

$430.21

Should ship between 20 Nov and 04 Dec

Subject to factory lead times

The Dwyer - FS-100-050 is a Flow Switch for Threaded Plastic Piping featuring Liquid, 0.5 GPM Switch Point, 50 VA SPST, 3/4 ", NPT Female, ± 10 % Accuracy, PP, and 12 " (300mm) Wire L. Part of the FS-100 Series. Sold individually.

$115.18

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FSW-160 is a Flow Switch featuring Paddle, Heavy Duty, Liquid, 4 GPM to 500 GPM, 15 A SPDT, 1 ", NPT Male, ± 1 % Accuracy, 316 SS, 304 SS, Brass, and EPDM. Sold individually.

$255.22

Should ship between 01 Nov and 04 Nov

Subject to factory lead times

The Dwyer - FST-321-SPST is a Flow Switch featuring Thermal Dispersion, Gas, 1 FPS to 90 FPS, 1 A SPST Relay, N.O/N.C, Selectable, 3/4 " to 1-1/2 ", NPT Male, ± 5 % Accuracy, PP, PVDF, and 10 ' Wire L. Part of the FST-320 Series. Sold individually.

$360.50

Should ship between 04 Dec and 11 Dec

Subject to factory lead times

The Dwyer - FSW301 is a Flow Switch featuring Low Cost, Economical, Liquid, 4 GPM to 132 GPM, 26 VA SPST, 1/2 ", NPT Male, Brass, SS, PP, and Noryl. Part of the FSW300 Series. Sold individually.

$373.10

Should ship between 01 Nov and 04 Nov

Subject to factory lead times

The Dwyer - FST-212-SPST is a Flow Switch featuring Thermal Dispersion, Liquid, 0.04 FPS to 3 FPS, 1 A SPST Relay, N.O/N.C, Selectable, 3/4 " to 1-1/2 ", NPT Male, ± 5 % Accuracy, PVDF, and 10 " Wire L. Part of the FST-200 Series. Sold individually.

$566.90

Should ship between 04 Dec and 11 Dec

Subject to factory lead times

The Dwyer - FS-100-025 is a Flow Switch for Threaded Plastic Piping featuring Liquid, 0.25 GPM Switch Point, 50 VA SPST, 3/4 ", NPT Female, ± 10 % Accuracy, PP, and 12 " (300mm) Wire L. Part of the FS-100 Series. Sold individually.

$109.02

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FSW-25 is a Flow Switch featuring Trim-to-Size, Paddle, Liquid, 43 Centistokes, SPDT, 1 ", PT, ± 1 % Accuracy, 304 SS, and Aluminum. Sold individually.

$450.36

Should ship between 01 Nov and 04 Nov

Subject to factory lead times

The Dwyer - FST-221-SPST is a Flow Switch featuring Thermal Dispersion, Liquid, 0.04 FPS to 3 FPS, 1 A SPST Relay, N.O/N.C, Selectable, 2 " to 12 ", NPT Male, ± 5 % Accuracy, PP, PVDF, and 10 " Wire L. Part of the FST-200 Series. Sold individually.

$341.99

Should ship between 04 Dec and 11 Dec

Subject to factory lead times

The Dwyer - FSW-42A is a Flow Switch for 3 " to 10 " Pipe featuring Industrial, Liquid, 2 FPS to 15 FPS, 15 A SPDT, 1 ", NPT Male, Brass, 316 SS, Phosphor Bronze, and EPDM. Part of the FSW-40A Series. Sold individually.

$745.16

Should ship between 01 Nov and 04 Nov

Subject to factory lead times

The Dwyer - FSW304 is a Flow Switch featuring Low Cost, Economical, Liquid, 3.5 GPM to 4.4 GPM, 26 VA SPST, 1 ", NPT Female, and Brass. Part of the FSW300 Series. Sold individually.

$430.21

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FSW-41A is a Flow Switch for 1-1/2 " to 2-1/2 " Pipe featuring Industrial, Liquid, 2 FPS to 15 FPS, 15 A SPDT, 1 ", NPT Male, Brass, 316 SS, Phosphor Bronze, and EPDM. Part of the FSW-40A Series. Sold individually.

$745.16

Should ship between 01 Nov and 04 Nov

Subject to factory lead times

The Dwyer - FST-211-SPST is a Flow Switch featuring Thermal Dispersion, Liquid, 0.04 FPS to 3 FPS, 1 A SPST Relay, N.O/N.C, Selectable, 3/4 " to 1-1/2 ", NPT Male, ± 5 % Accuracy, PP, PVDF, and 10 " Wire L. Part of the FST-200 Series. Sold individually.

$326.67

Should ship between 04 Dec and 11 Dec

Subject to factory lead times

The Dwyer - FSW-30A is a Flow Switch featuring Non-Magnetic, Industrial, Water, 0.12 GPM to 8 GPM, 15 A SPDT, 1/2 ", NPT Female, Brass, 316 SS, Phosphor Bronze, and EPDM. Part of the FSW30 Series. Sold individually.

$854.90

Should ship between 01 Nov and 04 Nov

Subject to factory lead times

The Dwyer - FST1001R is a Flow Switch featuring Economical, Air, 0 FPM to 5000 FPM, 2 SPST N.O Relays, 1/4 ", Compression Fitting, ± 2 % Accuracy, 304 SS, 12 " Wire L, and Remote Probe. Part of the FST1000 Series. Sold individually.

$574.17$622.77

You save 8%
Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FS-100-250 is a Flow Switch for Threaded Plastic Piping featuring Liquid, 2.5 GPM Switch Point, 50 VA SPST, 3/4 ", NPT Female, ± 10 % Accuracy, PP, and 12 " (300mm) Wire L. Part of the FS-100 Series. Sold individually.

$115.18

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FSW-43A is a Flow Switch for 10 " to 48 " Pipe featuring Industrial, Liquid, 2 FPS to 15 FPS, 15 A SPDT, 1 ", NPT Male, Brass, 316 SS, Phosphor Bronze, and EPDM. Part of the FSW-40A Series. Sold individually.

$745.16

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FS-100-200 is a Flow Switch for Threaded Plastic Piping featuring Liquid, 2 GPM Switch Point, 50 VA SPST, 3/4 ", NPT Female, ± 10 % Accuracy, PP, and 12 " (300mm) Wire L. Part of the FS-100 Series. Sold individually.

$109.02

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FST1001A is a Flow Switch featuring Economical, Air, 0 FPM to 5000 FPM, 2 SPST N.O Relays, 1/4 ", Compression Fitting, ± 2 % Accuracy, 304 SS, 12 " Wire L, and Fixed Probe. Part of the FST1000 Series. Sold individually.

$504.58$547.28

You save 8%
Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FS-100-100 is a Flow Switch for Threaded Plastic Piping featuring Liquid, 1 GPM Switch Point, 50 VA SPST, 3/4 ", NPT Female, ± 10 % Accuracy, PP, and 12 " (300mm) Wire L. Part of the FS-100 Series. Sold individually.

$109.02

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FSW-42A-SS is a Flow Switch for 3 " to 10 " Pipe featuring Industrial, Liquid, 2 FPS to 15 FPS, 15 A SPDT, 1 ", NPT Male, Brass, 316 SS, Phosphor Bronze, EPDM, FKM, and PTFE. Part of the FSW-40A Series. Sold individually.

$1,179.12

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FSW-6212 is a Flow Switch featuring Thermal Dispersion, Liquid 0.09 FPS to 9.84 FPS, Gas 0.16 FPS to 49 FPS, 5 A SPDT, 3/4 ", NPT Male, ± 10 % Accuracy, 316 SS, and 2 " Insertion L. Part of the FSW-6000 Series. Sold individually.

$1,174.92

Should ship between 27 Nov and 04 Dec

Subject to factory lead times

The Dwyer - FSW303 is a Flow Switch featuring Low Cost, Economical, Liquid, 1.8 GPM to 2.4 GPM, 26 VA SPST, 3/4 ", NPT Female, and Brass. Part of the FSW300 Series. Sold individually.

$430.21

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FSW-40A is a Flow Switch for 1 " Pipe featuring Industrial, Liquid, 2 FPS to 15 FPS, 15 A SPDT, 1 ", NPT Male, Brass, 316 SS, Phosphor Bronze, and EPDM. Part of the FSW-40A Series. Sold individually.

$705.35

Should ship between 13 Nov and 20 Nov

Subject to factory lead times

The Dwyer - FSW302 is a Flow Switch featuring Low Cost, Economical, Liquid, 0.9 GPM to 1.1 GPM, 26 VA SPST, 1/2 ", NPT Female, and Brass. Part of the FSW300 Series. Sold individually.

$430.21

Should ship between 20 Nov and 04 Dec

Subject to factory lead times