With increasing compliance demands for emissions monitoring and nitrogen oxide (NOx) measurement in industrial applications, Emerson released a hybrid laser process gas analyzer.
Emerson’s Rosemount CT4400 Continuous Gas Analyzer is a purpose-built Quantum Cascade Laser (QCL) and Tunable Diode Laser (TDL) analyzer designed to help plants reduce ownership costs and report emissions accurately in environmental monitoring applications measuring standard components, such as nitric oxide (NO), nitrogen dioxide (NO2), sulfur dioxide (SO2), carbon monoxide (CO), carbon dioxide (CO2), and oxygen (O2).
Optimized for cold and dry applications running at ambient pressure, the Rosemount CT4400 analyzer offers the benefits of QCL/TDL technology, including high sensitivity, accuracy, improved stability, and low-drift performance in a configuration that allows fast, easy integration into existing plant infrastructure.
“Our customers are looking for a better way to measure emissions without the ongoing high costs or need for frequent calibration and complex sample preparation that requires NOx converters or ozone generators,” said Paul Miller, managing director for Rosemount Quantum Cascade laser analyzers, Emerson Automation Solutions.
Because the system can hold up to four laser modules, it can measure up to seven application-specific gas components simultaneously, providing flexibility in continuous emissions monitoring systems (CEMS) applications. This simultaneous, multi-component analysis within a single analyzer reduces the need for multiple analyzers.
At the heart of the Rosemount CT4400 is Emerson’s QCL technology, which detects gas molecules in the near- and mid-infrared wavelength range. The system employs a patented laser chirp technique that enables detection of individual gas species, free from the cross-interference effects of other gas components in the stream, making the measurement highly accurate and stable down to sub ppm concentrations.