Air Quality Meters features: As8700a Portable Co Gas Analyzers Handheld Carbon Monoxide Meter Tester Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. 100% brand new and high quality OOTDTY Features: The Carbon monoxide gas detector is a portable detector for detecting carbon monoxide (CO) gas. It can continuously monitor the CO gas concentration in the surrounding environment, once the gas concentration reaches the level of the alarm, the alarm will sound, light. High precision portable CO gas tester with compact size and light weight is easy to carry and operate. It is widely used in petroleum, chemical, coal, metallurgy, paper, fire, municipal, telecommunications, food, textile and other industries. Features: Portable detector for detecting carbon monoxide(CO) gas. Can continuously monitor the CO gas concentration in the surrounding environment. Sound alarm works when CO gas concentration reaches the level of the alarm. Compact size, light weight, easy to carry and operate. Professional and accurate measurement. Large LCD display and ℃/℉ switch. Can set concentration of alarm value. Auto power off in 10 minutes without any operation. Color: Orange + Black Material: ABS Plastic Sensor Type: Stablized Electrochemical Gas Specific (CO) Detection Gas: Carbon Monoxide (CO) Temperature Measurement: Ambient Temperature Display Unit: CO: ppm, Temperature: ℃/℉ Measurement Range: CO: 0~1000PPM, Temperature: 0~50℃ / 32~122℉ Resolution: CO: 1PPM, Temperature: 0.1℃ / 0.1℉ Accuracy: CO:±5% or ±10PPM, Temperature: ±1.5℃ Response Time: Alarm: Sound & Light Alarm Alarm Point: 24PPM Preset (Adjustable) Battery Type: 3 * AAA 1.5V Alkaline Batteries (NOT Included) Operating Temperature: 0~50℃, Relative Humidity 1%~99% Storage Temperature: -30~60℃, Relative Humidity: 1%~99% Item Size: Approx. 135 * 50 * 35mm / 5.31 * 1.97 * 1.38in (L * W * H) Item Weight: Approx. 89g / 3.13oz Package Size: Approx. 21.5 * 15 * 5cm / 8.46 * 5.91 * 1.97in (L * W * H) Package Weight: Approx. 127g / 4.48oz