Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 141, Issue 2, Pages 370-380Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2009.06.050
Keywords
Carbon black/polymer composite; Gas sensor; Micro-hotplate; Temperature modulation
Ask authors/readers for more resources
This paper presents a novel signal processing technique for a square wave temperature modulated carbon black/polymer composite sensor. The technique consists of only two mathematical operations: summing the off-and on-transients of the conductance signals, and subtracting the steady-state conductance signal. The technique has been verified through its application to a carbon black/polyvinylpyrrolidone composite chemoresistor. Identification of water, methanol and ethanol vapours was successfully demonstrated using the peak time of the resultant curves. Furthermore, quantification of those vapours was found to be possible using the height of the peak heights, which was linearly proportional to concentration. The technique does not require zero-gas calibration and thus is superior to previously reported techniques. (C) 2009 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available