1. Reliability and Validity of Electrothermometers and Associated Thermocouples.
- Author
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Jutte, Lisa S., Knight, Kenneth L., and Long, Blaine C.
- Subjects
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THERMOELECTRIC apparatus & appliances , *MEDICAL thermometers , *THERMOCOUPLES , *TEMPERATURE measurements , *RELIABILITY (Engineering) -- Evaluation , *TEST validity - Abstract
Objective: Examine thermocouple model uncertainty (reliability + validity). Design: First, a 3 × 3 repeated measures design with independent variables electro-thermometers and thermocouple model. Second, a 1 × 3 repeated measures design with independent variable subprobe. Intervention: Three electro-thermometers, 3 thermocouple models, a multi-sensor probe and a mercury thermometer measured a stable water bath. Main Outcome Measures: Temperature and absolute temperature differences between thermocouples and a mercury thermometer. Results: Thermocouple uncertainty was greater than manufactures' claims. For all thermocouple models, validity and reliability were better in the Iso-Themex than the Datalogger, but there were no practical differences between models within an electro-thermometers. Validity of multi-sensor probes and thermocouples within a probe were not different but were greater than manufacturers' claims. Reliability of multiprobes and thermocouples within a probe were within manufacturers claims. Conclusion: Thermocouple models vary in reliability and validity. Scientists should test and report the uncertainty of their equipment rather than depending on manufactures' claims. [ABSTRACT FROM AUTHOR]
- Published
- 2008
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