Physical Sciences Inc. Publications Abstract: Progress in reducing size and cost of trace gas analyzers based on Tunable Diode Laser Absorption Spectroscopy

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Abstract: Progress in reducing size and cost of trace gas analyzers based on Tunable Diode Laser Absorption Spectroscopy

M.B. Frish, R.T. Wainner, B.D. Green, J. Stafford-Evans, M.C. Laderer, M.G. Allen, "Progress in reducing size and cost of trace gas analyzers based on Tunable Diode Laser Absorption Spectroscopy ," presented at SPIE Optics East Advanced Environmental, Chemical, and Biological Sensing Technologies II (Philadelphia, PA) , (26 October2004).

This paper was published in SPIE Optics East Advanced Environmental, Chemical, and Biological Sensing Technologies II, and is made available as an electronic reprint (preprint) with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

Abstract

Trace gas analysis by near-infrared Tunable Diode Laser Absorption Spectroscopy (TDLAS) has evolved over the past decade from a laboratory specialty to an accepted, robust, and reliable industrial process monitoring and control technology. Early industrial-quality TDLAS analyzers occupied full instrumentation racks and frequently cost several hundred thousands of dollars to purchase and install. The technology has now been refined to the point where complete TDLAS analyzers are available in lightweight battery-operated packages similar to a smoke detector that cost a few thousand dollars. This paper summarizes the current state-of-the-art in near-IR TDLAS sensors, focusing on miniature low-cost devices, and some of their applications.

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