Title :
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
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;
Conference_Titel :
Sensing Technology (ICST), 2012 Sixth International Conference on
Conference_Location :
Kolkata
Print_ISBN :
978-1-4673-2246-1
DOI :
10.1109/ICSensT.2012.6461651
