Green House Monitor, including CO2,humidity and Temperature. Green House Analysing for CO2, O2, Temperature, Humidity, Application CO2 Monitoring Photosynthesis monitoringSpecifications Temperature 0°C~50°CHumidity ... (mA) @ 60mADisplay CO2(0~100%)Tem(-20°C~70°C)Humidity(0~99%RH)Time:24 Hour :Hour:Minute:SecondRepeatability <±100ppmCO2 ...