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ST75/ST75V Gas Mass Flow Meters
for Line Sizes 1/4 to 2 inch [6 to 51 mm]
Mass Flow Meter SummaryThe ST75 is an accurate, no moving
parts, direct mass flow measurement and monitoring solution for fuel
gases, air, compressed air, inert and other gas flows within
industrial processes. It is available in nine different sizes for
direct, in-line installation in line sizes from 1/4 to 2 inch [ 6 to
51mm].
By combining precision lithography structured platinum RTD sensors
embedded in FCI's equal mass thermowells with microprocessor
electronics and precise actual gas calibration, the ST75 achieves
outstanding flow measurement performance. Using FCI's proven thermal
dispersion technology, the ST75's direct mass flow measurement,
eliminates the cost and space of additional sensors required by
inferred technologies. With its 100:1 turndown and flow ranges from
0.01 to 559 SCFM [0.01 to 950 NCMH], the ST75 measures over a wide
flow range, from low to high flow conditions. The ST75 is available
in specific calibrations for most gases including natural gas,
methane and other hydrocarbon gases, as well as, nitrogen, CO2,
argon and all inert gases, compressed air and more.
Applications |
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Burner and
Boiler Fuel and Air Feed Lines |
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Heat
Treating Gas Controls Industrial Furnaces, Kilns and Oven
Fuel/Air Controls |
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Industrial
Furnaces, Kilns and Oven Fuel/Air Controls |
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Air
Compressor System Control and Point-of-Use Monitoring |
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Chiller Air Flow Measurements |
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Co-Gen and Turbine Generator Fuel Flow Measurements |
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Dosing and
Gas Injection Rate Controls |
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SpecificationsMedia Compatibility: Air,
compressed air, nitrogen, oxygen, argon, CO2, ozone, other
inert gases,
natural gas, and other hydrocarbon gases.
Pipe/Line Size Compatibility: 1/4" to 2" [ 6mm to
51mm]
Instrument
Range:*
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NPT Line Size |
1/4" |
1/2" |
3/4" |
1" |
1 1/2" |
2" |
| Min. SCFM |
0.04 |
0.13 |
0.22 |
0.35 |
0.85 |
1.40 |
| Min. [NCMH] |
[0.07] |
[0.22] |
[0.38] |
[0.59] |
[1.44] |
[2.38] |
| Max. SCFM |
17.34 |
50.64 |
88.88 |
139.95 |
339.31 |
559.27 |
| Max. [NCMH] |
[29.47] |
[86.04] |
[151.00] |
[237.78] |
[576.48] |
[950.20] |
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Tubing Line Size |
1/4" |
1/2" |
1" |
| Min. SCFM |
0.01 |
0.05 |
0.25 |
| Min. [NCMH] |
[0.01] |
[0.09] |
[0.42] |
| Max. SCFM |
3.02 |
21.15 |
99.08 |
| Max. [NCMH] |
[5.14] |
[35.94] |
[168.33] |
* Actual range subject to gas type and specific
conditions.
Accuracy: (at calibrated conditions)
± 2% reading ± 0.5% full scale (std. ST75); ±1% reading ± 0.5% full scale
(optional ST75, std. ST75V)
Temperature Coefficient: (at calibrated conditions)
With optional extended temperature compensation. Valid from 10% to 100% of full-scale calibration
Flow: Maximum ± 0.025% of reading/ºF up to 250ºF [±0.05% of reading/ºC up to 121 ºC]
Repeatability: ± 0.5% reading
Turndown Ratio: Factory set at 10:1 to 100:1
Temperature Compensation:
Standard 40 to 100° F [4 to 38° C]
Optional: 0 to 250° F [-18 to 121° C]
Turndown Ratio: 10:1 to 100:1
Agency Approvals: FM/CSA/CRN for hazardous
location installation, Class 1, Div. I Groups B, C,D. Div.
II Group A, B,C; ATEX/IECEX Zone I, II 2 G Ex d IIC T6....T3; II 2 D Ex td A21, IP67 T90°....T300° (pending);
CE Marked.
N.I.S.T. Certified Test Lab Calibration: Standard
Flow ElementInstallation: In-line "T", NPT or tube
Type: Thermal dispersion
Materials of Construction: All welded 316L stainless steel
probe element with Hastelloy-C thermowells; 316 stailess
steel NPT and tube fittings.
Process Connection:
T-fitting [NPT female]: 1/4", 1/2", 3/4", 1", 1 1/2" or 2"
Tubing: 1/4", 1/2" or 1"
Operating Temperature: 0 - 250° F [-18 to 55° C]
Operating Pressure:
T-fitting [NPT female]: 240 psig [16.5 bar(g)]
Tube: 600 psig [ 41 bar(g)]
Flow Transmitter
Enclosure: NEMA 4X (IP67) aluminum
epoxy coated
Output Signals:
(2) 4-20 mA assignable to flow or temperature
(1) 0-500 Hz pulse proportional to flow for totalizer/counter
Communication Port: RS-232C standard, optional wireless IR
to PDA with digital display models
Input Power:
DC: 18 to 36 Vdc
AC: 85 to 265 Vac (*CE mark approval from 100 to 240 Vac)
Operating Temperature Range: 0 to 140° F [-18 to 60° C]
Digital Display: (Optional)
4-LCD, 2 line x 16 characters. First line is flow rate and engineering units. Second line is user
selectable as temperature, flow totalizer or alternating.
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