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Monolithic Crystal Filter for Application in Viscosity Sensor

Authors :
Tadeusz Wrobel
Waldemar Soluch
Source :
IEEE Sensors Journal. 15:6005-6009
Publication Year :
2015
Publisher :
Institute of Electrical and Electronics Engineers (IEEE), 2015.

Abstract

Monolithic crystal filter (MCF) on AT-cut quartz for application in viscosity sensor was developed. After proper matching, at a frequency of $\sim 3.6$ MHz, insertion loss in air of $\sim 1.6$ dB was obtained. The linear coefficient of frequency of about −5 ppm/°C and changes of the insertion loss of $\sim 0.5$ dB, in the temperature range of 10°–80°, were obtained. To eliminate errors caused by the longitudinal acoustic wave generation, MCF should be immersed in a measured liquid or proper amount of liquid should be inserted into the sensing window. Using water and glycerin solutions, insertion loss changes against dynamic viscosity of the MCF were measured. In a viscosity range from about 1 to 1000 $\textrm {mPa}\cdot \textrm {s}$ , an insertion loss change of $\sim 24$ dB was obtained.

Details

ISSN :
23799153 and 1530437X
Volume :
15
Database :
OpenAIRE
Journal :
IEEE Sensors Journal
Accession number :
edsair.doi...........bb7d1de16afa97eb2a53f433165b0196
Full Text :
https://doi.org/10.1109/jsen.2015.2451217