The CEM400 is an extractive online gas analyser dedicated to Continuous Emission Monitoring.
It is based on UV spectroscopy that brings a higher sensitivity than infra-red and gives the possibility to measure several gases simultaneously. A high selectivity is achieved by a fast Fourier transform (FFT) on the absorbance spectrum for all the gases having a periodic structure like NH3, SO2, NO and some others. All the internal gas circuit is heated at 190°C to admit directly hot and humid combustion gases. the CEM400 stand in a watertight wall mounted enclosure. This model may include a heated sampling pump as an option.