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To contact us about OFS-2000F click here

  OFS-2000F Optical Flow Sensor [Flare Gas Flow Monitor]

 • Full cross-stack/duct measurement for superior accuracy
 • Unaffected by distance & pressure, moisture or opacity.
 • Conforms to EPA 40 C.F.R. Part 60 Subpart Ja.
 • Non-intrusive; nothing in flow path.
 • No flow media high temperature limits.
 • No calibration necessary.
 • Accurate at low velocity and ambient temperature
 • Installs in short runs - 2 dia. upstream,1 dia. downstream
 • Built in continuous self-test diagnostics.     


Whatever you call it: Flare Gas Sensor, Flow Monitor, or Flare Analyzer, OFS 2000F is specially developed for refinery flare stack applications where increased velocity scale, wider temperature range, and quick response time are necessary. OSI's optical scintillation technology provides the most accurate, path-averaged air velocity measurements of any flare gas sensor. It's superiority has bee proven again and again, in flare, air-assisted flare, and SRU (Sulfur Recovery Unit) installations world-wide.


Partial List of Specifications
All OFS 2000 models are configurable for many different operating environments. For full specifications and available accessories click here


Measurement Technique Optical scintillation

Dynamic Range 0.03 to 100 m/sec, bidirectional

Accuracy (absolute) +/- 0.01 m/sec basic -or- <2% of reading, whichever is greater

Repeatability (relative) +/- 0.01 m/sec basic -or- <1% of reading, whichever is greater

Long Term Drift < 1% per year

Response Time User selectable: 3 sec to 600 sec

Stack/Duct/Pipe Diameter 0.3 to 10 m, standard -- consult OSI for other ranges

Media Temp./Pressure/Humidity No effect on measurement

Media Transparency Up to 95% opacity

Ambient Temperature/Humidity -40 to 60 C (-40 to 140 F)  /  0 - 100% condensing

Data Output 4-20mA and/or RS-232 ASCII serial I/O

Operating Temperature Range -40 to 140 F (-40 to 00 C)

Humidity 0 to 100%, Condensing

Dust Intrusion IP65

Mounting Flange 9" Dia. ANSI (150# 4” bolt pattern )

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