VOCs Identification Sensor System with Gas Sensors for Human Life

Abstract

To build up VOCs identification sensor system, sensitivity and selectivity of various types of semiconductor gas sensors for VOCs (ethanol, 1-propanol, benzene, toluene, acetone, methylacetate, ethylacetate, methylethylketone and trimethylamine) were examined. By using TGS2602, TGS2600, TGS2440NF and TGS2201 gas sensors, it can be recognize the kinds of VOCs in ambient atmosphere and its concentration from sub ppm to several ten ppm levels, while the sensing characteristics for VOCs are influenced by NO₂ contamination but not by SO₂.