Study on effect of temperature and humidity on the CO2 concentration measurement

2nd International Conference on Materials Science, Energy Technology and Environmental Engineering

材料科学;能源学;生态环境科学

Liu, Yuliang^1 ; Ni, Xiang^1 ; Wu, Yuanxi^1 ; Zhang, Wei^1

College of Electronic Information and Automation, Tianjin University of Science and Technology, 1038 Dagu Nanlu, Hexi District, Tianjin

300222, China^1

关键词: Concentration Measurement;    Effect of temperature;    Gas concentration measurement;    Interference factor;    Measurement parameters;    Non-dispersive infrared;    Temperature and humidities;    Temperature and humidity sensor;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/81/1/012083/pdf
DOI  :  10.1088/1755-1315/81/1/012083

来源: IOP

【 摘 要 】

In the application of non dispersive infrared (NDIR) carbon dioxide (CO2) concentration measurement, we need avoid the interference factors (such as temperature, pressure, gas, fluctuation of the light source and dust pollution etc.). In the past experiments only single factor, such as temperature, is often emphasized to the influence on the measurement results, without considering the effect of multiple factors. In order to study the change of gas concentration with measurement parameters, we constructs a CO2 detecting device with a BM530 gas detecting module, TMD10 temperature and humidity sensor. The experimental results show that: there is a correlation between the two interference factors: temperature and humidity. With the decreasing temperature, gas concentration measurement value decreases too. In developing process of instruments, we can make correction of the concentration- temperature instead of that of the measurement results under different temperature and humidity conditions.