Sight Flow Indicator/Transmitter

Product Applications

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


The 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.


ServiceCompatible fluids.
Wetted MaterialsBody: 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 Limits125 psi (8.62 bar).
Viscosity Maximum200 SSU.
WeightSFI Only: 1.5 lb (0.7 kg); with A-711T: 1.8 lb (0.8 kg).

Electrical Specifications

Temperature Limits-20 to 212°F (-29 to 100°C).
Power Requirements8 to 28 VDC.
Output SignalWhite 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 Range0 to 100 Hz.
Mounting OrientationHorizontal.
Electrical TerminationBlack 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