Description Type 1 The carbon dioxide detector detects the carbon-dioxide-gas of the onsite environment through absorption principle of infrared light sources. The product has the characteristics of temperature, humidity, tendency chart, 999 groups of data record, 3.2 TFT full color display, alarm setting, data record of time interval measurement, real-time date and time, chargeable lithium battery or separate external USB charging, use life of sensor 8,000 hours and stable data, max/min display. Support generate a PDF file, connect to a computer, display a disk to view and copy the previously generated PDF file for conveniently checking and analyzing, also support format the disk. Features: Compact size with a portable storage, easy to operate and to carry around. With profeional grade detection technology, this CO2 meter has stable performance, and high accuracy. 3.2-inch TFT full color display date, time, CO2, humidity, temperature(/ switchable), and other data clearly. Real time CO2 monitoring by the high-precision sensor, and it will alarm you once the CO2 is exceed the setting value. Can store up to 999 groups of data, and has a chart of historical data trend for you to review. Support generate a PDF file, connect to a computer, display a disk to view and copy the previously generated PDF file for conveniently checking and analyzing, also support format the disk. Support set the backlight operation time, 1min, 5min, 10min, 30min, 1hour and you also can close backlight. Support set the brightne of backlight, 25%, 50%, 75%, 100%, you can set according to your use habit. Support data clear, support on/off display max/min mode, support set time and data. Rechargeable lithium battery is included, or can be powered up through 5V USB cable. The application field of carbon dioxide detector is public site, agriculture, animal husbandry, industry, and more. Specifications: Name: Carbon Dioxide Detector Material: ABS Input: (USB) 5V, 2A Measuring Range: 0-9999PPM Resolution: 1PPM Accuracy: 40PPMrdg10% Temperature Measurement Range: -20~60(-4~140) Temperature Measurement Accuracy: 1(2) Temperature Resolution: 0.01/ Humidity Measurement Range: 0~99%RH Humidity Measurement Accuracy: 2%RH (20~80%RH) Humidity Resolution: 0.01%RH Working Temperature Range: -10~60(-14~140) Working Humidity Range: 0~99%RH Storage Temperature Range: -40~80(-40~176) Working Current: 180~300mA Recharging Time: 3 hours Powersupply: 1 * 3.7V, 2200mAh, 18650 battery or powered by 5V USB cable (both included) Record Groups: 999 groups Auto Power Off: capable of being set(default automatic power off time is 15min) Screen Size: 66 * 50mm / 2.60 * 1.97in Storage Box Size: 252 * 210 * 71mm / 9.92 * 8.27 * 2.80in CO2 Detector Size: 140 * 134 * 33mm / 5.51 * 5.28 * 1.30in Item Weight: 673g / 1.48lb Package Size: 270 * 215 * 72mm / 10.63 * 8.46 * 2.83in Package Weight: 822g / 1.81lb Packing List: 1 * Detector 1 * USB Cable 1 * Storage Box 1 * Manual (English) Type 2 This product is a multifunctional air quality detector that detects CO2 (carbon dioxide), temperature, and humidity with clock and record function. As a scientific air quality detection device, it combines infrared (NDIR) sensor with a built-in fan to allow real-time monitoring of CO2 (carbon dioxide), temperature, and humidity on its digital LCD display. Features: 4.3 color liquid crystal display (LCD), 320x240 pixels, 24 hours real time monitoring. Measurement items: CO2, temperature, humidity. Large 2000mAh capacity lithium battery. On-board fan to draw in ambient air for more accurate real-time results. 5V Micro USB charging and low battery warning. Specifications: Material: metal+ABS Color: black Model: DM72C Display method: 4.3 LCD screen display, 320x240 pixels Measurement items: CO2, temperature, humidity Atmospheric preure: 86Kpa-106Kpa CO2 technology: infrared (NDIR) Temperature and humidity technology: temperature and humidity sensor Detection range: CO2: 0-5000ppm Sampling time: 1.5 seconds Detection temperature: -10 to 50 / 14 to 122 Relative humidity: 20%-85% Storage temperature: -10 to 60 / 14 to 140 Battery: 1 * lithium battery, 2000mAh (included) Power source: 5V DC power charging via micro USB port Item size: 145 * 97.2 * 78mm / 5.7 * 3.8 * 3.1in Item weight: 225g / 7.9ounce Package size: 150 * 110 * 80mm / 5.9 * 4.3 * 3.1in Package weight: 480g / 1.1lb Packing List: 1 * Main Unit 1 * Charging Cable 1 * User Manual Type 3 This is a kind of fine quality air quality detector, which is adopt profeional electrochemical sensing module, high accuracy, stable performance, antijamming ability, low consumption and can provides long service time. Accurately detect CO2. Large display, you can see the electricity quantity, CO2 value, TVOC value, HCHO value, temperature, and humidity clearly. You can have a try. Features: Adopts digital temperature and humidity sensor, high accuracy, stable performance, antijamming ability, low consumption and can provides lon