Mass Flow Meters for Gas Applications

Yes. OSI's OFS-2000 series sensors are designed and certified for EPA 40 CFR Part 75 compliance. They are widely used at power plants and industrial facilities for continuous emissions monitoring, supporting regulatory reporting of stack gas flow and pollutant mass emissions such as NOx and SO2 in pounds per day.

No. OSI's optical flow sensors are factory-calibrated and feature drift-free measurement, meaning they never require field calibration. A built-in automatic calibration check continuously validates sensor performance, reducing maintenance burden and ensuring measurement accuracy throughout the sensor's operational life.

Yes. The OFS-2000W model incorporates Automatic Gain Control (AGC) technology specifically designed to compensate for high-opacity conditions caused by particulate matter, moisture, or entrained liquid droplets. It is suitable for wet scrubbers, bag houses, and other high-opacity industrial stacks where standard sensors may underperform.

The OFS-2000F, designed specifically for flare stacks, measures velocity from 0.03 to 170 m/sec, capturing both extremely low-flow conditions and very high flare velocities. The standard OFS-2000 covers 0 to 100 m/sec, suitable for most general industrial stack and duct applications.

Yes. The LOA-105 Long-Baseline Optical Anemometer is specifically designed for aluminum smelter pot room roof vents and holds EPA Method 14 Equivalency Approval. Its HF-resistant windows and air-purged housing ensure durability in corrosive hydrogen fluoride environments, while spatially averaged measurement delivers representative airflow data.

OSI optical flow sensors require a minimum of 2 upstream and 1 downstream pipe diameter of straight run for accurate measurement. They mount using a standard ANSI-pattern 4-inch pipe flange. The non-intrusive, cross-stack design means no process penetration is required, simplifying installation in most existing industrial stacks and ducts.