Title :
A novel NDIR CO2 sensor using a mid-IR hollow fiber as a gas cell
Author :
Peng, Jing ; Ji, Xin-Min ; Shi, Yi-Wei ; Liu, Quan ; Bao, Zong-Ming ; Huang, Yi-ping
Author_Institution :
Dept. of Microelectron., Fudan Univ., Shanghai, China
Abstract :
A novel CO2 non-dispersive infrared (NDIR) sensor using the mid-infrared (mid-IR) hollow fiber as a gas cell has been demonstrated. The mid-IR hollow fiber is chosen for its optimum transmission band (bandgap) overlap with CO2 fundamental absorption spectrum around 4.26 μm to serve as a filter. A comparison with the system using a smooth metal cell is presented. The signal noise suggests that a measurement resolution better than 5 ppm concentration is achievable using this mid-IR hollow fiber. The response time of the system using hollow fiber can be in the order of shorter than 10s with the sensitivity of 1.82 mv/ppm.
Keywords :
carbon compounds; energy gap; gas sensors; infrared detectors; CO2; NDIR carbon dioxide sensor; NDIR sensor; bandgap overlap; fundamental absorption spectrum; gas cell; measurement resolution; mid-IR hollow fiber; mid-infrared hollow fiber; nondispersive infrared sensor; optimum transmission band overlap; signal noise; smooth metal cell; Absorption; Gas detectors; Gases; Metals; Optical fiber sensors; Optical fibers; Sensitivity;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2010 10th IEEE International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-5797-7
DOI :
10.1109/ICSICT.2010.5667528
