Title :
A laser diode sensor for in-situ monitoring of H2S in the desulfurizing device
Author :
Wang, Liming ; Zhang, Yujun ; He, Ying ; Dong, JinTing ; You, Kun
Author_Institution :
Key Lab. of Environ. Opt. & Technol., Chinese Acad. of Sci., Hefei, China
Abstract :
Hydrogen Sulfide is a highly toxic and corrosive gas which is generated in many industrial processes. Gas detectors based on Tunable Diode Laser Absorption Spectroscopy (TDLAS) have been used in a wide variety of applications for safety and environmental field. In order to meet the requests of industrial field anti-explosion, a laser diode sensor for H2S in situ monitoring has been developed, combining with wavelength modulation spectroscopy technology, White cell technology and current loop technology. The important features of the H2S sensor are the speed of response, nonintrusive in-situ safety measurement, zero cross interference from background gases and long distance transmitting with the detection limit of 10ppm·m. The continuously monitoring results demonstrate that the sensor is suitable for application of H2S monitoring in desulfurizing device.
Keywords :
gas sensors; hazardous materials; measurement by laser beam; process monitoring; semiconductor lasers; corrosive gas; current loop technology; desulfurizing device; gas detectors; hydrogen sulphide in-situ monitoring; industrial field antiexplosion; industrial process; laser diode sensor; nonintrusive in-situ safety measurement; toxic gas; tunable diode laser absorption spectroscopy; wavelength modulation spectroscopy technology; white cell technology; zero cross interference; Chemical lasers; Hydrogen; Integrated optics; Medical services; Optical modulation; Optical sensors; Reliability; Current Loop; Hydrocarbon Sulfide (H2S); Long Distance Transmitting; TDLAS;
Conference_Titel :
Electronics and Optoelectronics (ICEOE), 2011 International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-61284-275-2
DOI :
10.1109/ICEOE.2011.6013483
