... , light weight, rugged ABS+PC case 2. battery operated gas detecotr, infrared alphasense co2 sensor 3. OEM IntroductionWe, Beijing Dashiweiye ... mining applications, including underground Coal Mine, petrochemical, metallurgical, chemical, municipal gas, and other places at the scene detection; Technical specification Technical ... requirement. Infrared co2 detector to test ppm concentration by IR sensor