ISO 9001:2015 Quality System certified

ISO 9001:2015 Quality System

RoHS certified

RoHS Compliance

EPA 40 CFR Part 75 certified

EPA 40 CFR Part 75

Chemical Industry Gas Flow Meters

OSI's Chemical Industry Gas Flow Meters utilize patented optical scintillation technology to deliver non-intrusive, drift-free gas flow measurement in demanding chemical environments. Designed for flare stacks, wet scrubbers, thermal oxidizers, and EPA 40 CFR Part 75 compliance, these sensors require no calibration and are virtually maintenance-free.

OFS-2000W Optical Flow Sensor for Wet Scrubbers, Bag Houses, and High Opacity
OFS-2000 Optical Flow Sensor
OFS Optical Flow Sensor
OFS Optical Flow Sensors for Flares

Our Range of Products

OFS-2000W Optical Flow Sensor for Wet Scrubbers, Bag Houses, and High Opacity

OFS-2000W Optical Flow Sensor for Wet Scrubbers, Bag Houses, and High Opacity

  • AGC compensates for high opacity conditions
  • Maintenance-free with no moving parts
  • NIST certified, EPA 40 CFR Part 75 ready
OFS-2000 Optical Flow Sensor

OFS-2000 Optical Flow Sensor

  • 0–100 m/sec optical measurement range
  • No calibration ever — zero drift design
  • EPA 40 CFR Part 75 & NIST certified
OFS Optical Flow Sensor

OFS Optical Flow Sensor

  • Extended range: 0.03–170 m/sec velocity
  • Non-intrusive, zero pressure drop design
  • Drift-free, calibration-free operation always
OFS Optical Flow Sensors for Flares

OFS Optical Flow Sensors for Flares

  • Wide range 0.03–170 m/sec for flare stacks
  • ±2% accuracy, factory calibrated for life
  • No moving parts — near-zero maintenance cost

Frequently Asked Questions

What makes optical scintillation technology suitable for chemical industry gas flow measurement?

Optical scintillation technology measures gas flow non-intrusively by analyzing light fluctuations across the measurement path. It is unaffected by gas composition, temperature, pressure, moisture, or opacity changes — making it ideal for the harsh, variable conditions found in chemical plants, refineries, and flare stacks where traditional sensors often fail or require frequent recalibration.

Are OSI gas flow meters compliant with EPA 40 CFR Part 75 emissions monitoring requirements?

Do OSI gas flow meters require field calibration or regular maintenance?

Can OSI flow sensors operate in wet scrubbers and high-opacity environments?

What is the measurement range for OSI's flare stack gas flow sensors?

How are OSI optical flow sensors installed on chemical process stacks?

What communications interfaces are available on OSI gas flow meters?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

Chemical & Petrochemical Plants

Chemical & Petrochemical Plants

Gas flow monitoring for sulfur recovery units, catalytic crackers, thermal oxidizers, and emissions compliance reporting.

Oil Refining & Flare Operations

Oil Refining & Flare Operations

Flare stack flow measurement across 0.03–170 m/sec range for EPA compliance and combustion efficiency monitoring at refineries.

Power Generation & Energy Utilities

Power Generation & Energy Utilities

Stack gas flow monitoring for EPA 40 CFR Part 75 compliance at coal, gas, and waste-to-energy power plants.

Environmental & Emissions Monitoring

Environmental & Emissions Monitoring

Continuous emissions monitoring system integration for NOx, SO2, and mass pollutant reporting at regulated industrial facilities.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

You might also like

Why Chemical Plants & Refineries Choose Optical Scientific

No Calibration. Ever.

OSI's patented NIST-certified optical scintillation algorithm is drift-free, eliminating costly field calibration and ensuring continuous measurement accuracy over the sensor's lifetime.

Built for Extreme Conditions

Unaffected by temperature, pressure, opacity, moisture, or gas density — OSI sensors deliver reliable ±2% accuracy in flare stacks, wet scrubbers, and high-dust chemical environments.

Over 30 Years of Proven Performance

Trusted by ExxonMobil, Shell, Chevron, DuPont, and the EPA, OSI has accumulated over 800 million field hours powering emissions and flow monitoring worldwide.

Request a Quote for Your Gas Flow Application

Submit your application details and our engineers will respond with a tailored sensor recommendation and pricing within one business day.

Contact Us Today

For immediate assistance, feel free to give us a direct call at +01 301 963 3630. You can also send us a quick email at info@opticalscientific.com.