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Sensors 2010, 10(4), 3073-3089; doi:10.3390/s100403073

Evaluation of Performance and Uncertainty of Infrared Tympanic Thermometers

Department of Bio-industrial Mechatronics Engineering, National ChungHsing University, 250 Kuokuang Rd., Taichung 40227, Taiwan
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Received: 21 February 2010 / Revised: 13 March 2010 / Accepted: 23 March 2010 / Published: 31 March 2010
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Abstract

Infrared tympanic thermometers (ITTs) are easy to use and have a quick response time. They are widely used for temperature measurement of the human body. The accuracy and uncertainty of measurement is the importance performance indicator for these meters. The performance of two infrared tympanic thermometers, Braun THT-3020 and OMRON MC-510, were evaluated in this study. The cell of a temperature calibrator was modified to serve as the standard temperature of the blackbody. The errors of measurement for the two meters were reduced by the calibration equation. The predictive values could meet the requirements of the ASTM standard. The sources of uncertainty include the standard deviations of replication at fixed temperature or the predicted values of calibration equation, reference standard values and resolution. The uncertainty analysis shows that the uncertainty of calibration equation is the main source for combined uncertainty. Ambient temperature did not have the significant effects on the measured performance. The calibration equations could improve the accuracy of ITTs. However, these equations did not improve the uncertainty of ITTs.
Keywords: infrared tympanic thermometer; uncertainty; calibration equation infrared tympanic thermometer; uncertainty; calibration equation
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Chung, W.; Chen, C. Evaluation of Performance and Uncertainty of Infrared Tympanic Thermometers. Sensors 2010, 10, 3073-3089.

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