Henan Duotesi (DUOTESl) is a technology company dedicated to the development and applica-tion of sensor technology, integrating R&D, production, sales, and services. At present, our company has 16 years of R&D experience and sufficient R&D personnel, which enables us to respond quickly tomarket demands and continuously develop new sensor technologies and products. Successively, it has launched infrared gas sensors based on PlD and NDlR principles, aswell as low-power infrared combustible sensors that currently hold a significant market share. These sensors can be widely applied in industrial safety areas such as gas stations, oil explora-tion, and city utility tunnels.