[An experimental study of the effect of structure sealing of infrared CO2 sensor on its accuracy].
OBJECTIVE
To study the effect of structure sealing of infrared CO2 sensor on its accuracy.


METHODS
Two experiments were designed. The IR CO2 sensor based on infrared principle and no comparing lighting path with only one beam of light were calibrated in one experiment, and in the other experiment the sensors were placed in an environment simulating the practical condition. The temperature, pressure and standard gas were kept same in the two experiments while CO2 concentrations in the dead volume were varied.


RESULTS
Readings from the sensors varied with the variation of the CO2 concentration in the dead volume of the sensors.


CONCLUSIONS
The structure sealing of the IR CO2 sensor has great influence on its accuracy. A sealed dead volume in the IR CO2 sensor can decrease or eliminate the effect.
Huang
Gang
G
Institute of Space Medico-Engineering, Beijing, China. hg1971@vip.sina.com
Deng
Yi-bing
YB
Xu
Bo
B
Wang
Wei-rong
WR
Xia
Lin-gen
LG
Chao
Zhao-gang
ZG
Wang
Xiao-xia
XX
D001274:Atmospheric Pressure; D002138:Calibration; D002245:Carbon Dioxide; D004784:Environmental Monitoring / Q000295:instrumentation*; D005069:Evaluation Studies as Topic; D007259:Infrared Rays; D012680:Sensitivity and Specificity
D002245:Carbon Dioxide