DONGGUAN HAOPIN SENSORS CO. LTD has dedicated around tweenty years to the design, manufacture and supply of carbonmonoxide sensors , carbon monoxide alarms/detectors and explosive gas detectors,smoke alarms and their combination..Our fully equipped production plant provides an environment for high quality. To ensure outstanding product design and quality, over tens of staff including a team of R & D engineers work hand in hand in all stages of production. Our design engineers ever worked in R&D department of Kidde, the world largest supplier of CO alarms, smoke alarms for ten years.All of our products are manufactured to the highest quality standards, such as EN standards and UL standardsWhile the standard of our products is continuously improving, we strive to provide our valued customers with the best quality at the lowest price and with our best services. All of our staff are looking forward to serving your needs.