Dwyer Series SFI-100T Sight Flow Indicator/Transmitter

Part Number: Series SFI-100T Category:

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Dwyer Series SFI-100T Sight Flow Indicators & Transmitters is a low cost and durable flow transmitter that combines our popular 100 Series Sight Flow Indicator with our A-711T output sensor for visual and remote monitoring of flow. The A-711T output sensor has two pulsed voltage signals with one providing a 5 VDC pulse, the other a pulse of the input supply voltage used, ranging from 8 to 28 VDC, and a pulsed output with a frequency change proportional to the flow rate.

Product Applications

  • Monitor chilled or hot water flow
  • Monitoring water flow in chillers
  • Cooling and lubrication circuits
  • HVAC systems

Service : Compatible fluids.

Wetted Materials : Body: Brass; Window: Tempered glass; Rotor: Red UV stabilized PBT; Rotor pin: 316 SS; Thrust washers: 300 series SS; Gasket: Buna-N.

Temperature Limits : -20 to 200°F (-29 to 93°C).

Pressure Limits : 125 psi (8.62 bar).

Viscosity Maximum : 200 SSU.

Weight : SFI Only: 1.5 lb (0.7 kg); with A-711T: 1.8 lb (0.8 kg).


Temperature Limits : -20 to 212°F (-29 to 100°C).

Power Requirements : 8 to 28 VDC.

Output Signal : White lead: 5 VDC; Green lead: 8 to 28 VDC equal to supply voltage. Pulsed output with frequency rate proportional to flow rate.

Accuracy : ±5% of FS.

Frequency Output Range : 0 to 100 Hz.

Mounting Orientation : Horizontal.

Electrical Termination : Black lead: Ground; White lead: 5 VDC out pulse; Green lead: 8 to 28 VDC out pulse; Red lead: 8 to 28 VDC supply.

  • Constructed of a robust, solid brass body and a tempered glass window
  • Bright red impeller yields great visual indication of flow through the window
  • Front window can be easily unscrewed to clean out the sight flow indicator
  • Ideal for outdoor applications with weatherproof body that is unaffected by UV light

Manuals: Instruction Manual
Catalog Pages: Series SFI-100T Catalog Page

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