TN-20 Portable CO2 gas detector with a large backlit LCD display, with a sound, two-color light alarm and vibrating alert to ensure that in a very hostile work environment can also detect dangerous gases and promptly alert the operator prevention. Detector shell is made of high-strength engineering materials, composite elastic rubber materials from refined, high strength, feel good. Carbon dioxide detector Features: 1, imported sensors, stable and reliable performance 2, high strength ABS plastic, composite elastic rubber material of the housing 3, sound, vibration, and red and yellow colored light alarm 4, large-screen digital, character display, instantaneous value peak, average display 5, high-precision, high-resolution, fast response 6, high-capacity rechargeable lithium battery, can work long hours CO Detector Specifications: Detection of gas: air, carbon dioxide (CO2) Range: 0 500ppm, 2000ppm, 5000ppm, 10000ppm, 50000ppm, 20% Accuracy: <± 5% (FS) Minimum reading: 1ppm Response time: ≤25 seconds Sensor life: 60-month double-beam infrared detection principle Battery: 3.6V lithium-ion rechargeable battery Display: large-screen LCD Alarm: sound, vibration, and red and yellow colored light alarm Direct reading: instantaneous, peak, battery voltage, TWA, STEL proof mark: Exibd II CT3 Protection class: IP45 Working temperature: -10∽40 ℃ work Humidity: 5-90% RH Dimensions: 130mm × 70mm × 32mm Weight: 210g above data depends on the environmental conditions are subject to special requirements can be customized