... weight, rugged ABS+PC case 2. Two gas sensors in one device multi-functional 3. Welcome OEM IntroductionWe, Beijing ... and facilities around the world. Application:it’s used in industrial or mining applications, including underground Coal Mine, petrochemical ... )Alarm sound intensity≥75dBAlarm light≥20M visibleAlarm pointcan be set in full proceed (factory setting 24ppm)Alarm waySound, lightContinuous ...