Continuous Gas Analyser for Accurate Detection and Analysis of up to 12 Gases Simultaneously

In response to the worldwide need for highly accurate, easy-to-use and cost-effective process gas analysis and emissions monitoring systems, Emerson (USA) has released the Rosemount CT5400 continuous gas analyser.

Uniquely combining tunable diode laser (TDL) and quantum cascade laser (QCL) technologies within the same analyser, the CT5400 uses a patented ‘laser chirp’ to provide near-instant high-resolution spectroscopy to detect and identify a range of molecules in both the near and mid-infrared range of spectroscopic light with an enhanced dynamic range from sub ppm to percent levels.

Unlike traditional process gas analysers requiring continuous calibration and verification, and other single laser-based systems which are limited to measurement of one or two components, the modular and scalable design of the CT5400 can incorporate up to six high-resolution laser modules and can detect, measure, and monitor up to 12 critical components simultaneously, eliminating the need for multiple analysers and sample handling systems. The CT5400 is a high-accuracy, low-cost alternative to other analyser technologies available today.

The CT5400 rack-mounted analyser is designed for process applications, DeNOX/SCR, ammonium nitrate precursors, continuous emissions monitoring systems (CEMS), and continuous ambient monitoring systems (CAMS). Sharing many of the same measurement principles as the recently released Rosemount CT5100 analyser, which comes in a ruggedised Class 1 enclosure for hazardous area installations, the CT5400 is a cost-effective alternative for plants with an existing shelter or safe area application.

“By using the chirp methodology, the Rosemount laser-based gas analysers have a significantly quicker response time and make continuous measurements. Sub-second measurements give operators the ability to make adjustments to their processes and avoid costly upsets that can develop into emergencies. In this way, the CT5400 offers plant managers and analyser operators greater peace of mind,” says Dr Ruth Lindley, product manager for Emerson QCL analysers. “The measurement is direct or ‘first principle’, unlike many traditional technologies where the measurements are inferred. This improves accuracy and eliminates the need for frequent calibration, saving engineer time and substantially reducing running costs.”