The module is specially developed for high-quality NDIR gas analysis instruments and can simultaneously measure SO₂, NO and CO. We can also customize the functions of measuring N₂O, CO₂, CH₄, hydrocarbons, other VOCs, malodorous gases and other infrared absorption gases according to customers’ requirements. The measurement range is from ppm to % level.

The module adopts the principle of non-dispersive infrared absorption and consists of a wide-spectrum infrared radiation light source, a gas chamber, a detector and a signal control and processing circuit. It analyzes the gas concentration by detecting the light intensity before and after gas absorption and thus calculating the absorbance.. The module adopts a high-performance wide-spectrum infrared radiation light source and a new type of multi-reflection infrared gas chamber designed by Laoying, achieving both high stability and low detection limit. The module has a smaller size than imported ones with the same detection limit and is convenient to be integrated into various gas analyzers. The optical path of the gas chamber can be customized, and the chamber wall does not affect the optical process, so the optical path is more stable and the measurement results are more reliable, without frequent cleaning of the gas chamber and other maintenance.