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http://dx.doi.org/10.46670/JSST.2021.30.6.456

Non-dispersive infrared carbon dioxide sensor with an externally exposed optical cavity  

Jung, Dong Geon (Advanced Mechatronics Group, Korea Institute of Industrial Technology (KITECH))
Lee, Junyeop (Advanced Mechatronics Group, Korea Institute of Industrial Technology (KITECH))
Do, Nam Gon (Advanced Mechatronics Group, Korea Institute of Industrial Technology (KITECH))
Jung, Daewoong (Advanced Mechatronics Group, Korea Institute of Industrial Technology (KITECH))
Publication Information
Journal of Sensor Science and Technology / v.30, no.6, 2021 , pp. 456-460 More about this Journal
Abstract
In this study, a Non-Dispersive Infrared (NDIR) Carbon Dioxide (CO2) sensor with an externally exposed optical cavity is proposed for improving sensitivity. NDIR CO2 sensors with high performance must use a lamp-type infrared (IR) source with a strong IR intensity. However, a lamp-type IR source generates high thermal energy that induces thermal noise, interfering with the accuracy of the CO2 concentration measure. To solve this problem, the optical cavity of the NDIR CO2 sensor is exposed to quickly dissipate heat. As a result, the proposed NDIR CO2 sensor has a shorter warm-up time and a higher sensitivity compared to the conventional NDIR CO2 sensor.
Keywords
Infrared; Non-dispersive infrared; Carbon dioxide; Sensor;
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