A capacitive-type humidity sensor using polymer electrolytes of PVA-LiCl thick films

Cuk Imawan, T. Bai, S. Budiawanti

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

Capacitive-type humidity sensors have been prepared using polymer electrolyte of poly (vinyl alcohol) (PVA) and lithium chloride (LiCl) thick films. Microstructure of the films were studied using XRD and SEM. SEM images of resultant polymer electrolytes thick films shown that the films are stacked by microparticles with particles size about 1 mm. The diffraction spectra confirmed that the LiCl forms nanocrystallites. Sensing characteristics and the sensing mechanism of the humidity sensors have been investigated by measuring the complex impedance of at different humidities and at various frequencies. The PVA-LiCl thick film RH sensors showed excellent humidity sensing properties over the wide relative humidity range from 33% to 94% RH. The sensitivity of the RH sensors depend on the operating frequencies and give the best sensitivity at 1 kHz.

Original languageEnglish
Title of host publicationProceeding - 2016 International Seminar on Sensors, Instrumentation, Measurement and Metrology, ISSIMM 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages48-52
Number of pages5
ISBN (Electronic)9781509011285
DOIs
Publication statusPublished - 3 Jan 2017
Event2016 International Seminar on Sensors, Instrumentation, Measurement and Metrology, ISSIMM 2016 - Malang, East Java, Indonesia
Duration: 10 Aug 201611 Aug 2016

Publication series

NameProceeding - 2016 International Seminar on Sensors, Instrumentation, Measurement and Metrology, ISSIMM 2016

Conference

Conference2016 International Seminar on Sensors, Instrumentation, Measurement and Metrology, ISSIMM 2016
CountryIndonesia
CityMalang, East Java
Period10/08/1611/08/16

Keywords

  • humidity sensors
  • Polymer electrolyte
  • polyvinyl alcohol
  • thick films

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