Transient Humidity Measurements—Part I: Sensor Calibration and Characteristics

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

[1]  E. R. Cohen.  An Introduction to Error Analysis: The Study of Uncertainties in Physical Measurements , 1998 .

[2]  Kensall D. Wise,et al.  A high-speed capacitive humidity sensor with on-chip thermal reset , 2000 .

[3]  Michael B. Pate,et al.  An Experimental Evaluation of Duct-Mounted Relative Humidity Sensors: Part 1 – Test and Evaluation Procedures , 2005 .

[4]  Carey J. Simonson,et al.  Application of humidity sensors and an interactive device , 2006 .

[5]  K. Carr-Brion,et al.  Moisture Sensors in Process Control , 1986 .

[6]  Robert W. Besant,et al.  Determining the performance of energy wheels: Part 1 -- Experimental and numerical methods , 1999 .

[7]  Noel Y. A. Shammas,et al.  A simple method for evaluating the transient thermal response of semiconductor devices , 2002, Microelectron. Reliab..

[8]  Wei Shang,et al.  Transient Humidity Measurements: Part II—Determination of the Characteristics of an Interactive Device , 2007, IEEE Transactions on Instrumentation and Measurement.

[9]  Claude Pellet,et al.  Dynamic behavior of a chemical sensor for humidity level measurement in human breath , 2004, IEEE Transactions on Instrumentation and Measurement.

[10]  O. O. Abe.  Effectiveness of energy wheels from transient measurements , 2005 .

[11]  Carey J. Simonson,et al.  Relationship between energy wheel speed and effectiveness and its transient response, Part II: Comparison between mathematical model predictions and experimental measurements and uncertainty analysis , 2006 .

[12]  Y. Wang.  Transient characteristics of humidity sensors and their applications to energy wheels , 2005 .