【Product Introduction】

Utilizing Quantum Cascade Laser Absorption Spectroscopy (QCLAS), the instrument employs highly reflective mirrors in the atmosphere to achieve multiple reflections of mid-infrared laser light, with an effective optical path length of several tens of meters. It measures the weak absorption of mid-infrared laser energy by target gases at characteristic absorption peaks and retrieves trace gas concentrations through real-time integration of the absorption peak spectral curves.

The high-frequency concentration analysis capability of the HT8700 Atmospheric Ammonia Laser Open-Path Analyzer makes it highly suitable for micrometeorological eddy covariance measurement techniques. When combined with a flux observation system, it can accurately quantify the net exchange flux of ammonia between different ecosystems and the atmosphere. The HT8700 has established multiple partnerships with domestic universities and has been showcased at the National Carbon Neutrality Northern Center, the European Geosciences Union (EGU) Annual Meeting, the World Nitrogen Initiative (INI) Conference, and the AsiaFlux network. It has also been exported to the European Union for participation in scientific research projects. A collaborative paddy field ammonia emission flux system experiment with the Institute of Atmospheric Physics, Chinese Academy of Sciences, is located in Xianxiang, Ningbo. The results have been published in the world-renowned SCI journal《Agricultural and Forest Meteorology》.