In situ laser oxygen analyzer is an analyzer developed by our company based on tunable laser absorption spectroscopy (TDLAS) technology, which can achieve continuous, automatic, rapid and precise detection of various gas concentrations such as O2, NH3, CH4, CO, CO2, HF, HCl, etc. Compared with similar products, this equipment has the characteristics of high stability, high reliability, and strong selectivity. It adopts a radial structure and can be installed in situ for measurement. It has the characteristics of fast response speed and simple installation.