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[An experimental study of the effect of structure sealing of infrared CO2 sensor on its accuracy]
Gang Huang1, Yi-bing Deng, Bo Xu
1Institute of Space Medico-Engineering, Beijing, China. hg1971@vip.sina.com
Objective:
To study the effect of structure sealing of infrared CO2 sensor on its accuracy.
Method:
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.
Result:
Readings from the sensors varied with the variation of the CO2 concentration in the dead volume of the sensors.
Conclusion:
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.
