Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 231, Issue -, Pages 529-538Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.03.040
Keywords
NDIR; Infrared; Gas monitoring; Sensor; Detector; Interference
Funding
- R&D Center for Green Patrol Technologies through the R&D for Global Top Environmental Technologies - Ministry of Environment, Republic of Korea (MOE)
- Korea Environmental Industry & Technology Institute (KEITI) [ARQ201501008003] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Non-dispersive infrared (NDIR) gas sensors applied in an environmental field are considered. Disadvantages of the non-dispersive infrared (NDIR) gas sensors include spectral interference and high detection limit. Efforts to improve these disadvantages are reviewed in this paper. Interference caused by water vapor and gas matrix has been partially solved using optical filters and interference correction factors. Limitations such as accuracy and sensitivity of the sensor were overcome by the improvements of inlet gas concentrations, infrared sources, optical designs (including optical filter and gas chamber) and detectors. These improvements are limited to a few gases, in particular, carbon dioxide. Drawbacks related to water vapor still remain and need to be addressed. (C) 2016 Elsevier B.V. All rights reserved.
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