Field evaluation of a multipoint fiber optic sensor array for methane detection (OMEGA)

Jane Hodgkinson; Russell Pride; Chris Tandy; David G. Moodie; George Stewart

doi:10.1117/12.397868

31 August 2000 Field evaluation of a multipoint fiber optic sensor array for methane detection (OMEGA)

Jane Hodgkinson, Russell Pride, Chris Tandy, David G. Moodie, George Stewart

Proceedings Volume 4074, Applications of Optical Fiber Sensors; (2000) https://doi.org/10.1117/12.397868
Event: Symposium on Applied Photonics, 2000, Glasgow, United Kingdom

Abstract

A multi-point fiber optic sensor array for methane detector (`OMEGA') has been developed and tested under semi- quantitative field conditions. The new system employed wavelength modulation spectroscopy using a DFB laser source scanned across the Q6 methane line at 1.665 micrometers . A branched fiber network connected the single source to up to 64 sensor heads. Controlled releases of natural gas were provided for test purposes within an array of four optical sensors and four pellistor reference sensors. An automated system delivered standard gases to each sensor, to enable routine calibration checks to be carried out. Agreement between the conventional and optical systems was excellent in the range 0 - 100% LEL (lower explosion limit). The optical system offers a simple, intrinsically safe design with a low cost of ownership per sensor head.

Citation Download Citation

Jane Hodgkinson, Russell Pride, Chris Tandy, David G. Moodie, and George Stewart "Field evaluation of a multipoint fiber optic sensor array for methane detection (OMEGA)", Proc. SPIE 4074, Applications of Optical Fiber Sensors, (31 August 2000); https://doi.org/10.1117/12.397868

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