Design of automatic system for multiple-gas sensing

This paper presents the design of the automatic system for detecting harmful gases. It uses PC, NI LabWindows/CVI, commercially available data acquisition hardware, and circuit boards specially designed for fluctuation-enhanced gas sensing. The system can not only be used for laboratory research and teaching, but also used for detecting CH
₄
and CO in coal mines. Our initial test results with commercial sensor support the feasibility of developing this prototype into a cost effective product used for multiple-gas sensing.