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Dwyer Series SFI-800 Sight Flow Indicator/Transmitter

Low Cost, Optional Output for Flow Rate and Totalization
The Series SFI-800 Sight Flow Indicator is a low cost, durable rotor style flow indicator with optional output sensor. Constructed of clear Polysulfone, enabling 360° viewing of the rotor, the SFI-800 has excellent pressure ratings, temperature ratings, and chemical compatibility. The optional A-711 output sensor has a VDC output with pulsing for flow rate totalization and a proportional frequency change for flow rate.
For added versatility there are two output choices of 5 VDC or a VDC equal to the input power supplied. The output is compatible with digital rate meters/totalizers and other electronic systems.

The SFI-800 is compact, panel mountable and the A-711 output sensor package can be ordered factory assembled or can be easily installed on an existing unit in the field.

  • Clear Polysulfone housing enables rotor visibility from almost all angles
  • Output package is easily field installed on indication only model
  • Constructed of all FDA approved wetted materials
  • Mountable in any orientation*
  • There are no magnets in the rotor to attract ferrous materials
SPECIFICATIONS
Service: Compatible fluids.
Wetted Materials: Body-Polysulfone; Window-Polysulfone; Rotor-Polysulfone; Rotor Pin-316 Stainless Steel; Thrust Washers-300 Series Stainless Steel; O-Ring-Viton® (NSF Grade).
Temperature Limits: -20° to 212°F (-28° to 100°C).
Pressure Limits: 150 psi (10.34 bar).
Viscosity Maximum: 200 SSU.
Weight: SFI-800: 3.35 oz (95 g); SFI-800-A711: 5.0 oz (142 g).

ELECTRICAL SPECIFICATIONS for A-711 Option Only
Temperature Limits: -20° to 212°F (-28° 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 F.S.
Frequency Output Range: 0 to 100 Hz.
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.

*NOTE: When mounting horizontally, place with round rotor housing on the bottom. This will prevent entrapped bubbles which may degrade performance.

Patent Pending

Viton® is a registered trademark of E.I. du Pont de Nemours and Company.

Popular Models
Model Number Description Range GPM (LPM) Connection Female NPT
 SFI-800-1/2  Indicator Only  2 - 20 (7.6 - 75.5)  1/2"
 SFI-800-3/4  Indicator Only  3 - 35 (11.4 - 132.5)  3/4"
 SFI-800-1/2-A711  Indicator with A-711 Sensor  2 - 20 (7.6 - 75.5)  1/2"
 SFI-800-3/4-A711  Indicator with A-711 Sensor  3 - 35 (11.4 - 132.5)  3/4"
Accessories
Model Number Description
 A-711  Output Sensor Package for Series SFI-800