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A basic mercury thermometer is a precisely crafted piece of tube-shaped glass enveloping a mercury-filled reservoir connected to an extremely thin channel, called the capillary bore, that provides a chamber the mercury from the reservoir can expand into.
Dec 18, 2023 · Learn about the types, uses, and risks of mercury thermometers, and how to safely dispose of them. Find out about the laws and alternatives to mercury fever thermometers in different settings.
The three fundamental components of a thermometer are a spirit or mercury-filled liquid that reacts to temperature changes, a glass tube to hold the liquid, and black ink to fill in the engraved scale marks with legible numbers. A sensitive thermometer is required to measure temperature.
- Digital thermometer. Digital thermometers work by using heat sensors that determine body temperature. They can be used to take temperature readings in the mouth, rectum, or armpit.
- Oral thermometer. Oral temperature can be taken by either a digital or mercury thermometer. We’ll go over the benefits and drawbacks of mercury thermometers below.
- Digital ear (tympanic) thermometer. Tympanic thermometers measure the temperature inside the ear canal through infrared ray technology. Tympanic readings are 0.5°F (0.3°C) to 1°F (0.6°C) higher than oral temperature readings.
- Forehead (temporal) thermometer. Forehead thermometers use infrared sensors to measure the temperature of the superficial temporal artery, which is a branch of the carotid artery.
Jan 11, 2023 · Learn about the different types of thermometers, including contact, remote and mercury. Find out why mercury thermometers are no longer recommended and how to dispose of them safely.
Oct 19, 2023 · Learn the history and science behind the use of mercury in thermometers. Find out how mercury's coefficient of expansion, boiling point, and toxicity compare with other liquids like water and alcohol.
A basic mercury thermometer is a precisely crafted piece of tube-shaped glass enveloping a mercury-filled reservoir connected to an extremely thin channel, called the capillary bore, that provides a chamber the mercury from the reservoir can expand into.
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