VCEM 5100 Insitu Flue Gas Flow Monitor
Non-Contact Time-of-Flight Flow Measurement for Extreme Stack Environments
Traditional pitot tubes and insertable flow sensors degrade rapidly in hot, dirty, and highly corrosive stack environments. The CODEL VCEM5100 overcomes these limitations through an entirely non-contact methodology. By mounting two robust lithium tantalate pyroelectric infrared detectors externally on the duct—typically 0.5m to 1m apart—the VCEM5100 performs high-speed cross-correlation analysis on the infrared signatures of the turbulent gas stream. This precise “time-of-flight” calculation delivers exceptional accuracy for flow velocities between 3 and 50 m/s. Equipped with high-efficiency air curtains to protect the optical lenses, the system requires virtually no maintenance and places no upper limit on the maximum flue gas temperature it can monitor.
Industrial Applications of the VCEM 5100: Large Combustion Plants, Flue-Gas Desulfurization (FGD), Cement Plants, Energy From Waste, Incinerators, Dust Collectors, Petrochemical sites, and SCR/SNCR processes.
- Infrared Cross-Correlation Detectors: Analyses the natural infrared emissions of the turbulent gas stream from outside the duct, measuring velocity without any intrusive probes that could erode or block.
- Lithium Tantalate Pyroelectric Sensors: Highly robust, heat-resistant detectors ensure reliable time-of-flight measurements with no absolute upper limit on process gas temperature.
- High-Efficiency Air Curtains: Constantly purges the optical windows, significantly extending maintenance intervals to typically one year, even in extremely dirty and dusty exhaust gases.
- Zero Moving Components: Eliminates mechanical wear and tear, guaranteeing incredibly high equipment availability and dramatically reducing the total cost of ownership.
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DCEM2100Frequently Asked Questions
The system features an automatic low and high span check function that complies with US EPA requirements, ensuring long-term operational accuracy.
Yes. The monitor holds both TUV (QAL1) and MCERTS certifications, verifying its accuracy and reliability for continuous automated measuring systems in compliance with US EPA and European EN 14181 and EN 15267-3 standards.
The VCEM5100 is fitted with high-efficiency air curtains that continuously purge the windows with clean, dry compressed air. This significantly extends the time between cleaning periods to typically one year, even in hot and dirty gases.
Because the monitor does not insert any components into the process stream, there is absolutely no upper limit on the flue gas temperature it can measure. The process gas must simply remain above a minimum of 70°C to generate a readable infrared signature.
The system operates on a non-contact principle using two infrared detectors mounted on the stack wall, separated by a known distance (0.5m to 1m). By analysing the unique infrared signature of the moving gas turbulence passing the first sensor and timing when it reaches the second, the system mathematically calculates the “time of flight” to determine accurate gas velocity.
