| Title | Relative humidity sensing by PVA-coated dual resonator SAW oscillator |
|---|---|
| Publication Type | Articolo su Rivista peer-reviewed |
| Year of Publication | 2000 |
| Authors | Penza, Michele, and Cassano Gennaro |
| Journal | Sensors and Actuators, B: Chemical |
| Volume | 68 |
| Pagination | 300-306 |
| ISSN | 09254005 |
| Keywords | Acoustic surface wave devices, Atmospheric humidity, Electronic module, Hydrogen bonds, Natural frequencies, Polyvinyl alcohols, Radio frequency amplifier, Relative humidity sensor, Sensors, Short medium term repeatability, Temperature |
| Abstract | A highly sensitive Surface Acoustic Wave (SAW) sensor system for relative humidity (RH) detection using chemically interactive polyvinyl-alcohol (PVA) film with implemented electronic module is described. The system configured as a dual resonator SAW oscillator consists of two SAW resonators, two RF amplifiers, and a mixer. The mixed frequency has been considered as output of the SAW sensor. The SAW response toward 60% RH has been measured as a frequency change of about - 11.5 MHz, at room temperature. A cross-sensitivity of the PVA film toward organic vapours with bonded OH groups has been also detected. The RH sensing characteristics, at room temperature, of the PVA-based dual SAW sensor have been analyzed in terms of sensitivity, calibration curve, detection limit, noise, water-resistance, short-medium term repeatability, aging, and sensing performances comparison. |
| Notes | cited By 135; Conference of Proceedings of Eurosensors XIII ; Conference Date: 12 September 1999 Through 15 September 1999; Conference Code:57382 |
| URL | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0034247725&doi=10.1016%2fS0925-4005%2800%2900448-2&partnerID=40&md5=d625b7e1fd407cc28011929f9277f409 |
| DOI | 10.1016/S0925-4005(00)00448-2 |
| Citation Key | Penza2000300 |
