Emission Monitoring Sensors & Systems

Predictive Emission Monitoring Systems (PEMS) offer a cost-effective alternative to continuous emissions monitoring by using process parameters to calculate emission levels. Key benefits include lower installation and maintenance costs, no need for costly extractive analyzers, continuous real-time data availability, and reduced downtime. PEMS can complement optical flow sensors to deliver comprehensive, regulatory-compliant emissions data.

Optical scintillation technology measures the intensity fluctuations of an infrared beam transmitted across a stack or duct. These fluctuations correlate directly to gas flow velocity. OSI's patented NIST-certified algorithm processes this signal non-intrusively, with no contact with the gas stream, no moving parts, and no sensitivity to temperature, pressure, opacity, or moisture variations.

No. All OSI optical flow sensors are factory pre-calibrated and feature drift-free measurement — they never require field calibration. A built-in automatic calibration check and continuous self-test diagnostics provide ongoing performance verification, eliminating costly calibration downtime and ensuring regulatory-compliant data integrity throughout the sensor's operational life.

OSI's OFS-2000 series sensors comply with EPA 40 CFR Part 75 for continuous stack gas flow monitoring at power plants and industrial facilities. The LOA-105 long-baseline anemometer carries EPA Method 14 Equivalency Approval for measuring airflow velocity in aluminum smelter roof vents. All products are supported by NIST-certified measurement algorithms.

Yes. The OFS-2000W model features Automatic Gain Control (AGC) specifically designed to compensate for high opacity caused by particulate matter, moisture, or liquid droplets in wet scrubbers and bag houses. The non-intrusive optical measurement is unaffected by gas density, temperature, or opacity changes, ensuring reliable data in the most challenging stack conditions.

OSI emission monitoring sensors serve power plants, petroleum refineries, aluminum smelters, chemical plants, incinerators, carbon capture systems, glass furnaces, and terminal loading facilities. Applications include flare stack flow monitoring, thermal oxidizer compliance, EPA 40 CFR Part 75 stack gas reporting, NOx emissions tracking, and sulfur recovery unit monitoring across global industrial operations.