Note For customers who purchased from 2022 1 20 the product already comes with PDF output function Note Starting from 2021 10 7 the bracket has been changed to a plastic bracket Iron brackets and plastic brackets are shipped randomly Descriptions The carbon dioxide monitor 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 alarm setting data record of time interval measurement real time date and time chargeable lithium battery etc Features The application field of carbon dioxide monitor is public site agriculture animal husbandry industry and more With professional 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 Compact size with a portable storage easy to operate and to carry around Rechargeable lithium battery is included or can be powered up through 5V USB cable Specifications Material ABSInput USB 5V 2AMeasuring Range 0 9999PPMResolution 1PPMAccuracy ±40PPM±rdg10 Temperature Measurement Range 20 60℃ 4 14