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Proceedings Paper

Compact portable QEPAS multi-gas sensor
Author(s): Lei Dong; Anatoliy A. Kosterev; David Thomazy; Frank K. Tittel
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Paper Abstract

A quartz-enhanced photoacoustic spectroscopy (QEPAS) based multi-gas sensor was developed to quantify concentrations of carbon monoxide (CO), hydrogen cyanide (HCN), hydrogen chloride (HCl), and carbon dioxide (CO2) in ambient air. The sensor consists of a compact package of dimensions 25cm x 25cm x 10cm and was designed to operate at atmospheric pressure. The HCN, CO2, and HCl measurement channels are based on cw, C-band telecommunication-style packaged, fiber-coupled diode lasers, while the CO channel uses a TO can-packaged Sb diode laser as an excitation source. Moreover, the sensor incorporates rechargeable batteries and can operate on batteries for at least 8 hours. It can also operate autonomously or interact with another device (such as a computer) via a RS232 serial port. Trace gas detection limits of 7.74ppm at 4288.29cm-1 for CO, 450ppb at 6539.11 cm-1 for HCN, 1.48ppm at 5739.26 cm-1 for HCl and 97ppm at 6361.25 cm-1 for CO2 for a 1sec average time, were demonstrated.

Paper Details

Date Published: 24 January 2011
PDF: 8 pages
Proc. SPIE 7945, Quantum Sensing and Nanophotonic Devices VIII, 79450R (24 January 2011); doi: 10.1117/12.875108
Show Author Affiliations
Lei Dong, Rice Univ. (United States)
Anatoliy A. Kosterev, Rice Univ. (United States)
David Thomazy, Rice Univ. (United States)
Frank K. Tittel, Rice Univ. (United States)

Published in SPIE Proceedings Vol. 7945:
Quantum Sensing and Nanophotonic Devices VIII
Manijeh Razeghi; Rengarajan Sudharsanan; Gail J. Brown, Editor(s)

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