TY - JOUR N2 - Sensing technology has been developed for detection of gases in some environmental, industrial, medical, and scientific applications. The main tasks of these works is to enhance performance of gas sensors taking into account their different applicability and scenarios of operation. This paper presents the descriptions, comparison and recent progress in some existing gas sensing technologies. Detailed introduction to optical sensing methods is presented. In a general way, other kinds of various sensors, such as catalytic, thermal conductivity, electrochemical, semiconductor and surface acoustic wave ones, are also presented. Furthermore, this paper focuses on performance of the optical method in detecting biomarkers in the exhaled air. There are discussed some examination results of the constructed devices. The devices operated on the basis of enhanced cavity and wavelength modulation spectroscopies. The experimental data used for analyzing applicability of these different sensing technologies in medical screening. Several suggestions related to future development are also discussed. L1 - http://www.czasopisma.pan.pl/Content/90404/PDF/10.1515-mms-2016-0026%20paper05.pdf L2 - http://www.czasopisma.pan.pl/Content/90404 PY - 2016 IS - No 2 EP - 224 DO - 10.1515/mms-2016-0026 KW - gas sensors KW - laser absorption spectroscopy KW - CEAS KW - MUPASS KW - breath analyses KW - medical screening A1 - Mikołajczyk, Janusz A1 - Magryta, Paweł A1 - Stacewicz, Tadeusz A1 - Smulko, Janusz A1 - Bielecki, Zbigniew A1 - Wojtas, Jacek A1 - Szabra, Dariusz A1 - Lentka, Łukasz A1 - Prokopiuk, Artur PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation VL - vol. 23 DA - 2016.06.30 T1 - Detection of Gaseous Compounds with Different Techniques SP - 205 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/90404 T2 - Metrology and Measurement Systems ER -