Must be inside a strong outer packaging having a sealed inner liner or bag constructed of strong, leak-proof and puncture-resistant material that is impervious to mercury and will prevent the escape of mercury from the package in any position. The individual must advise the airline of the presence of the mercury barometer or thermometer in the carry-on baggage. These devices contain more mercury than consumer devices (see separate entry in this table for medical/clinical thermometers) and may only be carried by a representative of a government weather bureau or similar agency. Mercury Barometer or ThermometerĬarried by government weather bureau or similar official agency. Digital thermometers are also not restricted. Tip: thermometers with a red line instead of silver are not mercury and not restricted. Regulation that allows it: 49 CFR 175.10(a)(7) Mercury can be found in a variety of non-laboratory items such as fluorescent light bulbs, thermometers, older pressure gauges, plumbing traps, manometers. The thermometer must be in a protective case. Mercury poses a risk to human health and the environment if not handled. Quantity limits: One small medical or clinical mercury thermometer for personal use, when carried in a protective case in checked baggage. Mercury thermometers should be properly disposed of as household hazardous waste.
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