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Sight Flow Transmitter

( Dwyer )

General

Series SF Sight Flow Transmitter integrates tangential turbine technology with hermetically sealed circuitry to provide accurate flow measurement and control in the harshest environments. The 2-wire loop-powered design transmits a 4 to 20 mA signal proportional to flow rate. Models can accurately measure flow in both directions and can be mounted in any orientation. Model SF11 has a clear polycarbonate viewing cover for visible indication of flow. Units feature LED power indication, adjustable zero and span, polarity protection and over current limiting.

 

Series SF2 Sight Flow Meters combine visual confirmation of flow with a relay or pulse output. The brass, unibody construction, one piece composite rotor, and ceramic shaft delivers durability with broader chemical, temperature, and pressure capabilities. For specific flow set-point switching, select SF2-1 meters with a SPDT relay output. Set-points are fully adjustable over the specified flow range. The dynamic operation of the rotor guards against jamming and false actuation. For flow rate monitoring or metering applications, select SF2-2 meters with a pulse output proportional to the rate of flow. The 4.5 to 24 VDC pulse output is compatible with most digital logic families.

 

 

Technical specifications:

 

Compatible liquids.

Wetted Materials

316 SS shaft and case, Iglide® bearings, Buna-N seal and

acetal copolymer, (polycarbonate cover on Model SF11)

Flow Range

0.5 to 15 GPM (5.7 to 56.8 LPM).

Accuracy:

±2% FS.

Repeatability

0.5% full scale.

Temperature Limits

20 to 225°F (–7 to 107°C).

Pressure Limits

500 psig (34 bar) Model SF10, 200 psig (14 bar) Model SF11.

Response Time

2 seconds to 90% (step change in flow rate).

Supply Voltage

12 to 35 VDC.

Output

4 to 20 mA.

Loop Resistance

1150 ohms max.

Process Connection

1/2˝ female NPT.

Electrical Connection

Wire Leads:

22 AWG x 9’ (2.7 m).

Max. Particle Size

100μm.