Surface Acoustic Wave (SAW) vapour sensor using 70 MHz SAW oscillator

Author

Islam, Tarikul ; Mittal, Utkrisht ; Nimal, A.T. ; Sharma, M.U.

Author_Institution

Deptt. of Electr. Eng., F/O Eng. & Technol., Jamia Millia Islamia, New Delhi, India

fYear

2012

fDate

18-21 Dec. 2012

Firstpage

112

Lastpage

114

Abstract

Surface Acoustic Wave (SAW) based device is very much suitable for detecting very small quantity of vapours of explosive chemicals. There are three possible kinds of SAW devices which can be used for sensor fabrication such as delay lines, resonator and filter. Choice among them depends on individual preferences and sometimes it is the matter of chance. In this paper, a high frequency 70 MHz SAW device has been developed for the detection of chemical warfare (CW) agents. SAW device is fabricated on ST -quartz substrate as it has negligible temperature coefficient at room temperature. The device is having dual oscillator circuit configuration for compensating the effects of temperature, humidity and pressure. Device is coated with suitable polymer and the applicability of the sensor for Dimethyl methylphosphonate (DMMP) detection has been demonstrated.

Keywords

compensation; explosive detection; gas sensors; polymers; quartz; surface acoustic wave oscillators; surface acoustic wave sensors; DMMP detection; SAW oscillator circuit configuration; SAW vapour sensor fabrication; ST-quartz substrate; chemical warfare agent detection; dimethyl methylphosphonate; explosive chemical; frequency 70 MHz; humidity compensation; polymer; pressure compensation; surface acoustic wave; temperature compensation; Coatings; Oscillators; Polymers; Sensors; Surface acoustic wave devices; Surface acoustic waves; DMMP sensor; Oscillator; Polymer Coating; SAW;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensing Technology (ICST), 2012 Sixth International Conference on

Conference_Location

Kolkata

ISSN

2156-8065

Print_ISBN

978-1-4673-2246-1

Type

conf

DOI

10.1109/ICSensT.2012.6461651

Filename

6461651