Transient Humidity Measurements—Part I: Sensor Calibration and Characteristics

Author

Wang, Yiheng Ian ; Simonson, Carey J. ; Besant, Robert W. ; Shang, Wei

Author_Institution

Dept. of Mech. Eng., Saskatchewan Univ., Saskatoon, Sask.

Volume

56

Issue

3

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

1074

Lastpage

1079

Abstract

In this paper, a transient test facility is used to investigate the transient response of a polymer film electronic humidity sensor (capacitance type) following a step change in humidity and temperature. The response of the humidity sensor is measured for a step change in the humidity with and without a change in temperature, and the data are correlated with exponential functions with two time constants. The major time constant of the sensor is about 3 s for the isothermal test but increases by an order of magnitude when the sensor is exposed to a simultaneous change in temperature and humidity

Keywords

calibration; electric sensing devices; humidity measurement; humidity sensors; transient response; humidity measurements; isothermal test; polymer film electronic humidity sensor; sensor calibration; transient response; transient test facility; Calibration; Capacitance; Capacitive sensors; Humidity measurement; Polymer films; Sensor phenomena and characterization; Temperature sensors; Test facilities; Time measurement; Transient response; Experiment; humidity; humidity sensor; response time; simultaneous heat and mass transfer; step change; temperature; transient calibration;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2007.894881

Filename

4201025