Development of a Portable and Sensitive CO 2 Measurement Device with NDIR Sensor Clusters and Minimizing Water Vapor Impact

Zhentao Wu, Xiaobing Pang (), Bo Xing, Qianqian Shang, Hai Wu (), Yu Lu, Haonan Wu, Yan Lyu, Jingjing Li, Baozhen Wang, Shimin Ding, Dongzhi Chen and Jianmeng Chen
Additional contact information
Zhentao Wu: College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
Xiaobing Pang: College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
Bo Xing: Shaoxing Ecological and Environmental Monitoring Center of Zhejiang Province, Shaoxing 312000, China
Qianqian Shang: College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
Hai Wu: National Institute of Metrology, Beijing 102200, China
Yu Lu: College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
Haonan Wu: College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
Yan Lyu: College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
Jingjing Li: Shaoxing Ecological and Environmental Monitoring Center of Zhejiang Province, Shaoxing 312000, China
Baozhen Wang: Green Intelligence Environmental School, Yangtze Normal University, Chongqing 408100, China
Shimin Ding: Green Intelligence Environmental School, Yangtze Normal University, Chongqing 408100, China
Dongzhi Chen: School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan 316022, China
Jianmeng Chen: College of Environment, Zhejiang University of Technology, Hangzhou 310014, China

Sustainability, 2023, vol. 15, issue 2, 1-13

Abstract: Increasing carbon dioxide (CO 2 ) concentrations threaten human production and life. Currently the equipment used for CO 2 monitoring is heavy and expensive, without a portable CO 2 detector that is inexpensive and resistant to interference. Here we designed a portable CO 2 detector based on no-dispersive infrared sensors to measure CO 2 concentration. The detector, which has a mass of 1 kg, is powered by a lithium battery with dimensions of 200 mm (length) × 150 mm (width) × 100 mm (height). Considering the fact that field observations are susceptible to humidity, a series of experiments were carried out to reduce the humidity interference on sensor responses at a laboratory. The values of humidity and CO 2 variation were used in a regression model analysis to determine a quadratic function with an R 2 above 0.94. The detector was compared with a reference analyzer in ambient CO 2 measurement during a 7-day field campaign in Hangzhou, China. After humidity correction, the data show better correlation with the reference data, with the R 2 0.62–0.97 increasing from 0.62–0.97 compared to before the correction and the value deviation decreasing to less than 3%. Cluster analysis of sensors revealed a reduction in average relative deviation of up to 1.4% as the number of sensors increased.

Keywords: CO 2 measurement device; humidity interference; non-dispersive infrared (NDIR); clustering sensors; regression model (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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