Journal
JOURNAL OF MUSCLE FOODS
Volume 20, Issue 2, Pages 138-159Publisher
WILEY
DOI: 10.1111/j.1745-4573.2009.00140.x
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Funding
- FSIS
- Food Safety Education Staff
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Three models each of consumer instant-read bimetal and digital thermometers were tested for accuracy, precision and response time compared with a calibrated thermocouple in cooked 80 and 90% lean ground beef patties and boneless and bone-in split chicken breasts. At the recommended insertion times, the percent of measurements matching a calibrated thermocouple were 14-69% for bimetal and 0-64% for digital thermometers. Bimetals averaged 2-11F and the digitals averaged 1-20F less than the thermocouple readings. With longer insertion times, bimetals registered 25-81% and digitals registered 14-92% of the products as cooked. Bimetals averaged 1-9F and the digitals averaged 2-7F less than the thermocouples. Measurement repeatability (precision) was high within and between individual thermometers of the same model. Results indicate that the consumer thermometers evaluated in this study required more than the recommended time to register products as cooked.
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