- 1State Key Laboratory of Quantum Optics Technologies and Devices, Shanxi University, Taiyuan 030006, P. R. China (wgqepas@163.com, cuiruyue@sxu.edu.cn, wuhp@sxu.edu.cn, donglei@sxu.edu.cn)
- 2Laboratoire de Physicochimie de l’Atmosphère, Université du Littoral Côte d’Opale, 59140 Dunkerque, France (yongyong.hu@univ-littoral.fr, weidong.chen@univ-littoral.fr)
We demonstrated an open-path, portable, low-power laser methane sensor system based on tunable diode laser absorption spectroscopy (TDLAS) and wavelength modulation spectroscopy (WMS) for monitoring methane concentrations in the atmosphere. The design of the open cavity structure accelerates the gas exchange process, reducing the power consumption and weight of additional equipment such as pumps. The portable methane sensor system achieves a methane concentration detection limit of 94 ppb, with dimensions of 22×20×7 cm3, a weight of 1182 g, power consumption of 1.8 W, and a response time of <1 s. To validate the practicality and portability of this sensor system, it was mounted in the front frame of a bicycle and employed for mobile methane monitoring on a campus.
How to cite: Wang, G., Cui, R., Hu, Y., Wu, H., Chen, W., and Dong, L.: Open-path, portable, low-power laser methane sensor system using miniature multi-pass cell for methane mobile monitoring, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-14308, https://doi.org/10.5194/egusphere-egu25-14308, 2025.
