In many industries, the regulations for permitted limits for gas emissions are constantly being tightened. For example, hydrogen chloride (HCl) is one of the gases that must be measured and reported by means of continuous emission monitoring. Thanks to its perfect selectivity for this harmful gas and its long-term stable performance, the Axetris LGD F200P2-H HCl/H2O laser gas detection OEM module is ideally suited to meet the requirements of these regulations. This is because its heated gas cell allows to measure hydrogen chloride extractively in the hot and humid gas stream.