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Introduction
The Department of Optics and Quantum Electronics , at the University of Szeged has more than ten years of experience in laser development and its application in material testing, biology and chemistry. Since the beginning emphasis was always put on the development of practically applicable systems, and therefore one of our aims was to develop systems which are compact, automatic and operable under industrial conditions.
Our photoacoustic systems are capable of long term unattended automatic operation over a long time period (several years), and the typically achievable ppm. (or even sub-ppm.) level sensitivity makes them ideal for measurement of minority (impurity) components in industrial gases (e.g. in natural gas) as an on-line instrument.
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Our manuscript is accepted for Infrared Physics and Technology
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