Infrared Ear Thermometer
Infrared Ear Thermometer
 Graco 1 Second Ear Thermometer Sale Price: $16.99  Eligible for free shipping!See Reviews For This Product DescriptionThermometer, Ear, 1-Second, 0+  |
 Safety 1st Quick Read Ear Thermometer List Price: Sale Price: $15.95 You save: $9.04 (36%) Eligible for free shipping!See Reviews For This Product DescriptionSafety 1st Quick Read Ear ThermometerWhen your baby isn't feeling well, you want to know right away if there's a fever involved. The Quick Read Thermometer from Safety 1st makes it easy with a large digital display that's easy to read and a convenient fever alert to let you know when your little one's temperature has risen above normal... |
 Safety 1st Exchangeable Tip 3 in 1 Thermometer List Price: Sale Price: $19.98 You save: $5.01 (20%) Eligible for free shipping!See Reviews For This Product DescriptionSafety 1st Exchangeable Tip 3 in 1 ThermometerAs a parent, you want options when it comes to taking your child's temperature - options that the Safety 1st Exchangeable Tip 3-in-1 Thermometer provides. With a fast accurate reading in 3 different modes, you choose which option works best and our auto tip recognition feature switches the thermometer into the proper mode... |
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Graco 1 Second Ear Thermometer Sale Price: $16.99 Eligible for free shipping!See Reviews For This Product DescriptionThermometer, Ear, 1-Second, 0+ |
Safety 1st Exchangeable Tip 3 in 1 Thermometer List Price: Sale Price: $19.98 You save: $5.01 (20%) Eligible for free shipping!See Reviews For This Product DescriptionSafety 1st Exchangeable Tip 3 in 1 ThermometerAs a parent, you want options when it comes to taking your child's temperature - options that the Safety 1st Exchangeable Tip 3-in-1 Thermometer provides. With a fast accurate reading in 3 different modes, you choose which option works best and our auto tip recognition feature switches the thermometer into the proper mode... |
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Safety 1st Quick Read Ear Thermometer List Price: Sale Price: $15.95 You save: $9.04 (36%) Eligible for free shipping!See Reviews For This Product DescriptionSafety 1st Quick Read Ear ThermometerWhen your baby isn't feeling well, you want to know right away if there's a fever involved. The Quick Read Thermometer from Safety 1st makes it easy with a large digital display that's easy to read and a convenient fever alert to let you know when your little one's temperature has risen above normal... |
Black body thermometer Physics Problem?
With young children and the elderly, use of a traditional fever thermometer has risks of bacterial contamination and tissue perforation. The radiation thermometer works fast and avoids most risks. The instrument measures the power of infrared radiation from the ear canal. This cavity is accurately described as a black body and is close to the hypothalamus, the body's temperature control center. Take normal body temperature as 37.0°C. If the body temperature of a feverish patient is 38.5°C, what is the increase in radiated power from his ear canal?
Stefan-Boltzmann law says total power radiated by a blackbody is proportional to the 4th power of the absolute temperature. Thus
P'= P (T'/ T)^4 = P (311.5 / 310)^4 = 1.019 P, ie the power goes up by a factor of 1.019.
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