Thomas Products Ltd.

ThomasModel 2000 Series -Liquid Flow Switch

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Standard flow calibration is in water  70°F with lead wires in horizontal position. Calibrated on decreasing flow. Set point accuracy will change slightly in other than calibrated position. Also available: Leads in different lengths, cable, terminated ends, etc. Consult factory.

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  • High-temperature units available to 400°F. Consult factory.
  • Standard flow settings are calibrated in water. Other set points in water or oil are available. Consult factory.
  • Other wetted materials: Hysol epoxy.
  • All SST piston for either brass or SST housings, eliminate hysol epoxy is available. Consult factory.
  • Relays for higher loads are available. See accessories section for details
  • Calibration: Flow stands are calibrated to the National Bureau of Standards and Thomas Products Ltd. recalibration schedule.

  • Weight: 1 lbs
  • Dimensions: 8 × 5 × 3 in
  • Housing Material Brass, SST
  • Reed Switch Logic: SPST, Red-Common, Red-NC (non-polar switch), SPST, Red-Common, Red-NO (non-polar switch)
  • Flow Set Point:    0.5 GPM Decreasing Flow, 1.0 GPM Decreasing Flow, 1.5 GPM Decreasing Flow, 2.0 GPM Decreasing Flow, 2.5 GPM Decreasing Flow, 3.0 GPM Decreasing Flow