Features 1、Use high quality CO electrochemical sensor, keenly sense the concentration of CO in the air, with high measurement accuracy 2、When the concentration of carbon monoxide reaches the preset alarm value, the alarm will be triggered automatically and reminded in time 3、LCD large screen display, clear imaging, easy to read, support digital time stamp, log record, sound alarm, light flashing and vibration alarm 4、Made of high quality ABS and rubber, strong and durable, light weight, non slip, suitable for daily use 5、Widely used in petroleum, chemical, coal, metallurgical, fire fighting, municipal, textile and other industries Specification Item Type: Gas Tester Model: GM8805 Material: ABS+Rubber Battery: 2 x 1.5V AAA(batery not included) Purposr: Widely used in petroleum, chemical, coal, metallurgical, fire fighting, municipal, textile and other industries Detection Gas CO in the air Range 0~1000ppm Resolution 1ppm Minimum Reading 1ppm Basic Error ±5%(F.S),±10ppm Response Time 60 seconds Sensor Type Electrochemical CO Sensor Working Environment 0~50℃, 32~122℉; 10~90%RH Storage Environment -10~50℃, -14~176℉; 10~75%RH Package List 1 x Gas Tester 1 x Manual