Compact portable QEPAS multi-gas sensor

Lei Dong; Anatoliy A. Kosterev; David Thomazy; Frank K. Tittel

doi:10.1117/12.875108

24 January 2011 Compact portable QEPAS multi-gas sensor

Lei Dong, Anatoliy A. Kosterev, David Thomazy, Frank K. Tittel

Proceedings Volume 7945, Quantum Sensing and Nanophotonic Devices VIII; 79450R (2011) https://doi.org/10.1117/12.875108
Event: SPIE OPTO, 2011, San Francisco, California, United States

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.

Citation Download Citation

Lei Dong, Anatoliy A. Kosterev, David Thomazy, and Frank K. Tittel "Compact portable QEPAS multi-gas sensor", Proc. SPIE 7945, Quantum Sensing and Nanophotonic Devices VIII, 79450R (24 January 2011); https://doi.org/10.1117/12.875108

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