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FS-926 Series Flow Switch

Brand: Gems Sensors, Inc

The FS-926 Series of precision-calibrated switches provides reliable and consistent performance; repeatability is within 1%. FS-926 units are factory preset for actuation at specified flow rates. 

These switches provide accurate detection of excessive or insufficient flow rates in such applications as: protecting against loss of fluid flow in hydraulic systems, assuring proper coolant flow in semiconductor processing equipment, monitoring high pressure lubrication systems, and ensuring proper air flow in water/waste systems. 

An additional, lap-fitted piston is used in Gems FS-926 Series to accurately detect low-flow rates.
Features
  • Port Size: 1/4˝ NPT
  • Primary Construction Material: Brass or Stainless Steel
  • Setting Type: Fixed
  • Flow Rate Settings: Liquids: 50-300 cc/min. Air/Gases: See Flow Settings at right

1 - 12 of 12 Part Numbers
26938
26938
  • Flow Rate - 50 cc/minute ± 10%, 0.013 GPM
  • Material - Brass
26939
26939
  • Flow Rate - 100 cc/minute ± 10%, 0.025 GPM
  • Material - Brass
26941
26941
  • Flow Rate - 150 cc/minute ± 10%, 0.045 GPM
  • Material - Brass
26942
26942
  • Flow Rate - 200 cc/minute ± 10%, 0.055 GPM
  • Material - Brass
26943
26943
  • Flow Rate - 250 cc/minute ± 10%, 0.065 GPM
  • Material - Brass
26944
26944
  • Flow Rate - 300 cc/minute ± 10%, 0.075 GPM
  • Material - Brass
26951
26951
  • Flow Rate - 50 cc/minute ± 10%, 0.013 GPM
  • Material - 316 Stainless Steel
26952
26952
  • Flow Rate - 100 cc/minute ± 10%, 0.025 GPM
  • Material - 316 Stainless Steel
26953
26953
  • Flow Rate - 150 cc/minute ± 10%, 0.045 GPM
  • Material - 316 Stainless Steel
26954
26954
  • Flow Rate - 200 cc/minute ± 10%, 0.055 GPM
  • Material - 316 Stainless Steel
26955
26955
  • Flow Rate - 250 cc/minute ± 10%, 0.065 GPM
  • Material - 316 Stainless Steel
26956
26956
  • Flow Rate - 300 cc/minute ± 10%, 0.075 GPM
  • Material - 316 Stainless Steel
1 - 12 of 12 Part Numbers

Specifications

Accuracy

  • Set Point Accuracy: ± 10 %
  • Set Point Differential: 15 %, Max.

Approvals & Certifications

  • CE
  • CSA: File No. LR30200
  • FM: File No. 1H3A2.AX, 0A8A3AE
  • RoHS
  • UL: File No. E31926
  • UR

Burst Pressure

  • psig: 5,000 (kPa: 34,470, bar: 344.7)

Conduit Connection

  • 1/2” NPT Female

Electrical Connectors

  • 18 AWG, 24” Long Polymeric Lead Wires

Electrical Rating

  • Switch: 20 VA

Enclosure, Body Material

  • 316 Stainless Steel
  • Brass

Flow Rate

  • 0.013 to 0.075 gpm
  • Liquids: 50 to 300 cc/Minute

Media

  • Air
  • Gas
  • Water

NPT Connection

  • 1/4” NPT Female

O-Ring Material

  • Viton

Operating Pressure

  • psig: 1,000 (kPa: 6,895, bar: 68.95) - Max.

Operating Temperature

  • -29° to 107.2° C (-20° to 225° F) with Polysulfone Piston
  • -29° to 149° C (-20° to 300° F) with Brass or Stainless Steel Piston

Piston Material

  • In Brass Housing: Brass for Oil or Air
  • In Brass Housing: Polysulfone for Water
  • Stainless Steel Housing: 316 Stainless Steel

Proof Pressure

  • psig: 2,500 (kPa: 17,240, bar: 172.4)

Repeatability

  • 1 %, Max.

Spring Material

  • 316 Stainless Steel

Switch Type

  • SPDT

Wetted Materials

  • Epoxy

  • Protecting against loss of fluid flow in hydraulic systems
  • Assuring proper coolant flow in semiconductor processing equipment
  • Monitoring high pressure lubrication systems
  • Ensuring proper air flow in water/waste systems

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