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Thermal Dispersion Flow Switches for Liquids

Item# FST-211-SPST

Thermal Dispersion Flow Switches for Liquids Thermal Dispersion Flow Switches for Liquids
OMEGA™ FST-200 Series flow switches use thermal dispersion technology to create a very accurate and economical method of sensing flow. Monitor fluids from 0.4 to 1.2 specific gravity, 1 to 300 cp, and pulsating flow from 10 to 100 pulses per minute. The sensors incorporate two temperature probes, one of which is heated. The flow of liquid reduces the temperature of the heated probe, decreasing the temperature differential with the non-heated probe. OMEGA’s LVCN-131 and LVCN-141 of controllers can easily be interfaced to perform a variety of control functions.
FST-211-SPST
  • High Reliability — No Moving Parts
  • Very Low Flow Detection–Down to 0.04 FPS Liquids
  • Use in 1/8 through 12" Pipe or Tubing
  • SPST Relay Standard
  • Excellent for Pump and Valve Monitoring of Critical Flows
Connection Size
Flow Rate
Body Material
Switch Type
Compatible Media
Pipe Size
Wire Length
 This item is available for quick shipping
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Quantity Price each
1-9 $219.39
10-24 $208.42
25-49 $204.03
50-99 $195.26
100-199 $190.87
200+ $186.48

In stock

Lead Time ( If not in Stock): 6 weeks

Product Specs

  • Maximum Pressure PP or PVDF: 150 psi @ 25°C (77°F) derated @ 1.667 psi per °C above 25°C (77°F)
  • Minimum Supply Voltage 12 VDC
  • Switch Operation selectable

OMEGA™ FST-200 Series flow switches use thermal dispersion technology to create a very accurate and economical method of sensing flow. Monitor fluids from 0.4 to 1.2 specific gravity, 1 to 300 cp, and pulsating flow from 10 to 100 pulses per minute. The sensors incorporate two temperature probes, one of which is heated. The flow of liquid reduces the temperature of the heated probe, decreasing the temperature differential with the non-heated probe. OMEGA’s LVCN-131 and LVCN-141 of controllers can easily be interfaced to perform a variety of control functions.

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