Wet Gas Flow Measurement — Differential Pressure Metering

Yes. All OFS-2000 series sensors are designed to meet EPA 40 CFR Part 75 requirements for continuous emissions monitoring at power plants and industrial facilities. The sensors provide compliant stack gas flow data used for mass emissions reporting in pounds of pollutants per day, supporting environmental permit requirements.

No field calibration is ever required. OSI's optical flow sensors are factory pre-calibrated and feature built-in drift-free measurement with an automatic calibration check. The sensors include continuous self-test diagnostics, eliminating the need for any scheduled calibration over the sensor's operational life.

Yes. The OFS-2000W model is specifically engineered for wet scrubbers, bag houses, and high-opacity conditions. It features Automatic Gain Control (AGC) that compensates for opacity variations caused by particulate matter or entrained moisture. The measurement is unaffected by gas density, moisture, temperature, or opacity changes.

The OFS-2000 covers 0–100 m/sec for general stack and industrial applications, while the OFS-2000F extends the range to 0.03–170 m/sec for flare stack applications where extremely low and high velocities must both be captured. Both deliver ±2% measurement accuracy across their full operating range.

OSI optical flow sensors require a minimum of 2 upstream and 1 downstream pipe diameters of straight run for proper installation. They mount using a standard ANSI pattern 4-inch pipe flange. OSI also provides installation support, on-site training, and hot tap procedures to assist facility engineers during the commissioning process.

OSI sensors are deployed across power generation, oil and gas refining, chemical processing, aluminum smelting, waste-to-energy, and environmental compliance sectors. Specific applications include flare stacks, thermal oxidizers, wet scrubbers, incinerators, carbon capture systems, sulfur recovery units, glass furnaces, and primary/secondary air ducts.