The pollutant gases specified in industrial regulations must always be reported to the authorities on a dry basis. However, these gases are measured in humid process gas. Therefore, it is important to determine the exact moisture content. The Axetris LGD F200P2-H H2O laser gas detection OEM module reliably measures absolute humidity up to 30% in the process gas without the need for regular calibrations. In addition, the robust design of the LGD module reduces maintenance to a minimum.