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To contact us about OFS-2000 click here
  OFS-2000 Optical Flow Sensor

 • Full cross-stack/duct measurement for superior accuracy
 • Unaffected by distance & pressure, moisture or opacity.
 • Non-intrusive; nothing in flow path.
 • No flow media high temperature limits.
 • No calibration necessary
 • Built in continuous self-test diagnostics.
 • Easy installation and alignment.
 • No moving parts: operates unattended - 24/7/365.
 • Rugged ultra-low maintenance design for harsh environments.     


Our original patented and still unequalled stack/duct flow velocity sensor for Continuous Emissions Monitoring Systems (CEMS). The OFS uses EPA - approved Method 14 optical scintillation technology. Optical scintillation technique uses advanced Digital Signal Processing (DSP) electronics to measure the movement of turbulence found in a gaseous flow stream to provide highly accurate, path-averaged air velocity measurements. OFS accuracy has been proven by the U.S. National Institute of Standards (NIST) and at customer sites 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

Velocity Range 0.1 to 40 m/s velocity

Path Length 0.3 to 10 meters standard (Consult OSI for other ranges)

Accuracy 2% of reading

Resolution 0.1 m/s

Response Time User selectable: 3 sec to 600 sec

Long Term Drift <1% >per year

Media Temperature No upper limit (for temp < 150F an activator heater may be required)

Light Source 670 nm red LED

Power Requirements 100-240 VAC, 50/60Hz (Transmitter 12VA, Control Enclosure 40VA)

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

Operating Temperature Range -40 to 140 F (-40 to 60 C)

Humidity 0 to 100%, Condensing

Dust Intrusion IP65

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


    To go to the OFS catalog page click here



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