Guoke Hanhai customized a flammable and toxic gas laser monitoring system for Beijing Gao'antun Waste-to-Energy Power Plant under Beijing Enterprises Group. Targeting the extreme conditions such as underground confinement, high humidity and strong corrosion in the landfill leachate collection area, as well as the hidden risks of methane and hydrogen sulfide, the system adopts a dual-mode solution integrating the Fixed Reflective Laser Gas Telemetry Analyzer and Portable Telemetric Laser Methane Detector. Based on Tunable Diode Laser Absorption Spectroscopy (TDLAS) technology, it achieves ppm-level accurate detection, supports 24/7 real-time monitoring and multi-level early warning. This solution not only addresses the pain points of traditional equipment and meets regulatory compliance requirements, but also realizes safety upgrading and operation & maintenance cost reduction, successfully building a solid safety barrier for confined spaces.