Photoacoustic spectroscopy gas sensors enable real-time detection of ppm-level gases such as CO and CH₄. Based on the photoacoustic spectroscopy principle, this product provides high accuracy, reliability, fast response, and maintenance-free operation. Compared with conventional optical sensors, it uses a near-infrared light source, significantly reducing system costs while maintaining detection accuracy, and effectively addressing the industry challenge of undetectable or inaccurate measurements at low gas concentrations. It is currently applied to CO monitoring of above-ground compressors, and can be extended to underground environments in the future, providing a cost-effective solution for toxic gas early warning in industrial sites and enhancing production safety through precise detection.