![]() ![]() The least concerning are the digital/electronic thermometers because they contain no potentially hazardous liquids that can spill if broken. The most concerning are mercury-containing thermometers. Potentially harmful effects from broken thermometers vary depending on the type of thermometer. You should pick a thermometer that is easy to use and read. The Environmental Protection Agency (EPA) recommends using mercury-free thermometers but it does not recommend any specific brand. Thermometers that check body temperature in the ear, across the forehead, or have a digital display do not contain mercury. Newer thermometers include non-mercury liquids in glass and digital and electronic devices that use sensors to measure temperature. The oldest thermometers used are mercury in glass. Checking a person’s temperature by mouth, ear, or forehead are reasonable alternatives. While rectal temperature is the most accurate it is often impractical to measure temperature this way. ![]() Temperatures can be checked in the mouth, rectum, armpit, ear, and across the forehead. A fever can be a sign of an infection or other medical conditions, so it is useful to be able to check body temperature with a thermometer. ![]()
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