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Sensors 2013, 13(4), 4157-4169; doi:10.3390/s130404157

Development of an Optical Gas Leak Sensor for Detecting Ethylene, Dimethyl Ether and Methane

1
Key Laboratory of Instrumentation Science & Dynamic Measurement, North University of China, Ministry of Education, Taiyuan 030051, Shanxi, China
2
National Key Laboratory for Electronic Measurement Technology, Taiyuan 030051, Shanxi, China
3
Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
*
Author to whom correspondence should be addressed.
Received: 1 March 2013 / Revised: 25 March 2013 / Accepted: 25 March 2013 / Published: 28 March 2013
(This article belongs to the Section Chemical Sensors)
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Abstract

In this paper, we present an approach to develop an optical gas leak sensor that can be used to measure ethylene, dimethyl ether, and methane. The sensor is designed based on the principles of IR absorption spectrum detection, and comprises two crossed elliptical surfaces with a folded reflection-type optical path. We first analyze the optical path and the use of this structure to design a miniature gas sensor. The proposed sensor includes two detectors (one to acquire the reference signal and the other for the response signal), the light source, and the filter, all of which are integrated in a miniature gold-plated chamber. We also designed a signal detection device to extract the sensor signal and a microprocessor to calculate and control the entire process. The produced sensor prototype had an accuracy of ±0.05%. Experiments which simulate the transportation of hazardous chemicals demonstrated that the developed sensor exhibited a good dynamic response and adequately met technical requirements. View Full-Text
Keywords: optical gas leak sensor; IR absorption spectrum; ethylene; dimethyl ether; methane optical gas leak sensor; IR absorption spectrum; ethylene; dimethyl ether; methane
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Tan, Q.; Pei, X.; Zhu, S.; Sun, D.; Liu, J.; Xue, C.; Liang, T.; Zhang, W.; Xiong, J. Development of an Optical Gas Leak Sensor for Detecting Ethylene, Dimethyl Ether and Methane. Sensors 2013, 13, 4157-4169.

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