Islam, Tarikul and Mistry, Kalyan Kumar and Sengupta, Kamalendu and Saha, H (2004) Measurement of gas moisture in the PPM range using porous silicon and porous alumina sensors. Sensors and Materials, 16 (7). pp. 345-356. ISSN 0914-4935

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This paper reports the performance of a porous silicon (PS) sensor for detecting ppm level moisture and compares its relative performance with that of porous alumina (PA) sensors. The porous alumina sensor is fabricated by the sol-gel technique. It is found experimentally that in measuring ppm level moisture the sensitivity of the PA sensor appears to be greater than that of the PS sensor while the response time of the PS sensor is much shorter than that of the PA sensor. A simple but precise technique for the electronic measurement of sensor capacitance, which minimizes the parasitic earth capacitances, has been developed to study the response of both PS and PA gas moisture sensors. The detection electronics can be utilized for an integrated sensor unit. However, initial characterizations of both PS/PA sensors are carried out using a standard LCR meter (HP-4284A) to establish the electronic circuit.

Item Type: Article
Uncontrolled Keywords: moisture sensor; ppm level moisture; porous silicon; porous alumina; sensor capacitance detection electronics
Subjects: Electronics
Depositing User: Subhra Lahiri
Date Deposited: 25 Jan 2012 10:07
Last Modified: 04 Apr 2016 10:32

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