Expert Exhaust Gas Flow Meter Solutions & Services

A gas flow meter measures how much gas moves through a stack, duct, pipe, flare, or process stream over time. In exhaust applications, this data supports emissions reporting, combustion monitoring, process control, and regulatory compliance. Optical flow sensors can provide real-time stack gas flow readings without moving parts, helping facilities reduce maintenance while maintaining continuous measurement availability.

An MFM, or mass flow meter, measures the mass flow rate of a gas and reports the value to a control or monitoring system. An MFC, or mass flow controller, includes measurement plus a control valve that actively regulates flow to a setpoint. Exhaust gas flow monitoring typically focuses on measurement, integration, diagnostics, and reliable data reporting rather than laboratory-style flow control.

CCM means cubic centimeters per minute measured at actual operating conditions, while SCCM means standard cubic centimeters per minute adjusted to defined standard temperature and pressure conditions. SCCM allows more consistent comparison between systems because gas volume changes with temperature and pressure. For industrial exhaust monitoring, units are selected based on compliance requirements, process conditions, and reporting standards.

A CFM meter measures cubic feet per minute, a volumetric flow rate commonly used for air and gas movement. In exhaust or stack applications, CFM readings can help quantify total gas flow through a duct or stack. Depending on the application, readings may be reported as actual CFM or corrected to standard conditions for consistent emissions calculations.

OSI optical flow sensors use scintillation-based measurement principles to detect turbulence patterns moving across an optical path. By analyzing the motion of these patterns, the system determines flow velocity in real time. This non-mechanical approach eliminates rotating parts, reduces sensitivity to dirt buildup on optics, and supports continuous diagnostics for demanding industrial exhaust environments.

Yes. OSI’s systems integration services include stack flow and emissions monitoring systems for EPA 40 CFR Part 75 compliance applications. Support can include sensor selection, mounting and enclosure design, power and communications, data acquisition software, integration with plant systems, on-site commissioning, and calibration verification to help customers meet operational and reporting needs.

OSI optical sensor technology is designed for virtually zero maintenance and 24/7/365 operation. The systems have no moving parts, require no scheduled or regular cleaning of optics, and are designed to remain insensitive to dirt buildup on optical surfaces. Built-in self-test, diagnostics, and performance monitoring also help operators identify issues before they affect data quality.

When requesting support, customers should provide the sensor model number, serial number, and a complete description of the problem. For repair or service returns, OSI requires an RMA number before equipment is sent to the Gaithersburg, Maryland facility. Warranty status, purchase order or payment details, and careful packaging may also be required depending on service needs.