3.4.4 Miniature Gas Analysis System for Volatile Organic Compounds

U. Lehmann & A. Grisel
SnO2 gas sensors are known for their high sensitivity towards volatile organic compounds (VOC) but are often hampered by their low selectivity. In order to improve the performance of the MSGS SnO2 sensor it is combined with a polymer lined micro-fabricated capillary. When passing through the capillary, the components of a small sample of mixed gaseous VOCs separate and can be detected one after the other by the sensor. When combined with a suitable sample...