NOTE: This is a Dropshipping link. There are 8 types of CO2 detectors available in the link. If you need other models, you can contact me. I can provide more than 30 models of air quality testing instruments. 

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    https://www.aliexpress.com/item/1005001349799067.html 

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    https://www.aliexpress.com/item/1005001626297693.html 

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    https://www.aliexpress.com/item/1005001349662146.html 

  The carbon dioxide detector detects the carbon dioxide 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, with alarm setting, data record of time interval measurement, real-time date and time display, chargeable lithium battery or separate external USB charging, use life of sensor ≥8000 hours and stable data.

  Features:

 3.2-inch TFT full color display date, time, CO2, humidity, temperature(℃/℉ switchable).

 Also can display test mode, historical trend, alarm value setting, records, setting, calibration, data clear and etc..

 Real time CO2 monitoring by the high accuracy sensor, and it will alarm you once the detecting data is exceed the setting value, and you can press "enter" button to open/close the alarm sound.

 Backlight brightness adjustable, 25%, 50%, 75% and 100% totally 4 gears for you to adjust.

 You can select to close auto shutdown function, or set 15min, 30min, 45min,1h, 2h, 4h, 8h auto shutdown time.

 Equipped with reset function, after reset all the parameters will be restored to factory parameters.

 Can store up to 999 groups of data, and has a chart of historical data trend for you to review.

 Compact and portable, easy to operate and to carry around with you.

 Comes with 3.7V, 2200mAh rechargeable lithium battery, or can be powered up through 5V USB cable.

 With professional grade detection technology, this CO2 meter has stable performance, and high accuracy.

 Suitable for public site, agriculture, animal husbandry, industry, and more.

 Don't operate or calibrate the equipment parameters at will to prevents error in data detection or inaccuracy.

  Specifications:

 Name: Carbon Dioxide Detector

 Material: ABS

 Input: (USB) 5V, 2A or 18650 battery

 Measuring Scope: 0-9999PPM

 Resolution: 1PPM

 Accuracy: ±10% of readings ±40PPM

 Working Temperature Range: -10℃ to +60℃(-14℉ to 140℉)

 Working Humidity Range: 0-99%RH

 Storage Temperature Range: -40℃ to +80℃(-40℉ to 176℉)

 Temperature Measurement Range: -20℃ to +60℃(-4℉ to 140℉)

 Temperature Measurement Accuracy: ±1℃(±2℉)

 Temperature Resolution: 0.01℃/℉

 Humidity Measurement Range: 0-100%RH

 Humidity Measurement Accuracy: ±2%RH

 Humidity Resolution: 0.01%RH

 Power Supply: 1 * 3.7V, 2200mAh 18650 rechargeable li-ion battery or powered by 5V USB cable (both included)

 Working Current: 100-300mA

 Charging Time: 3 hours

 Record Groups: 999 groups

 Screen Size: 66 * 50mm / 2.60 * 1.97in

 Item Size: 140 * 98 * 30mm / 5.51 * 3.86 * 1.18in

 Storage Box Size: 252 * 210 * 70mm / 9.92 * 8.27 * 2.76in

 Item Weight: 265g / 9.35ounce

 Package Size: 255 * 75 * 120mm / 10.04 * 2.95 * 4.72in

 Package Weight: 668g / 1.47lb

  Packing List:

 1 * Detector

 1 * USB Cable

 1 * Storage Box

 1 * Manual (English)