Series SFI-100T Sight Flow Indicator/Transmitter

Output for Flow Rate and Totalization

The 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.

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Product Applications

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

Models & Ordering

Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

COVID-19 Update: Due to high customer demand, lead time on some products may be up to two weeks. While this is a developing health situation, we are working continuously to take the necessary measures to ensure that the products you need are available with minimal interruption.

Model Description Usually Ships* Price Order
Ships: 2-3 Weeks
Price: $201.00
Brass sight flow indicator with A-711T sensor, range 2-20 GPM (7.6-75.5 LPM), 1/2" female NPT. 2-3 Weeks* $201.00 Order
Ships: 2-3 Weeks
Price: $201.00
Brass sight flow indicator with A-711T sensor, range 3-35 GPM (11.4-132.5 LPM), 3/4" female NPT. 2-3 Weeks* $201.00 Order


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.
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.
±5% of FS.
Frequency Output Range:
0 to 100 Hz.
Mounting Orientation:
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


Model Number Description Usually Ships* Price Order
A-711T Output sensor package for Series SFI-100T. 1-2 Weeks $71.50 Order

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