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Hybrid gas analyzer for emissions monitoring

| By Mary Page Bailey and Gerald Ondrey


The new Rosemount CT4400 continuous gas analyzer (photo) is said to be the world’s first 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, nitrogen dioxide, sulfur dioxide, carbon monoxide, carbon dioxide and oxygen. Optimized for cold and dry applications running at ambient pressure, the 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. 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. — Emerson, St. Louis, Mo.