The G-CEM4100 is a hot extractive analyser for difficult flue gas monitoring applications. It uses infrared absorption spectroscopy to measure up to seven pollutant species in a single self-contained unit. Many conventional extractive systems require the sampled gas to be cleaned and dried to a very high standard prior to analysis invariably resulting in a high maintenance demand. Such elaborate pre-conditioning is not required by the G-CEM4100. Process gases are continuously drawn through a coarse filtered probe located in the exhaust duct and transported to the measurement chamber via a short heated sample hose - without further conditioning. This makes G-CEM4100 the perfect choice for low maintenance monitoring.