🌡️ Mercury thermometer

A mercury thermometer will be confiscated at the checkpoint and cannot travel in carry-on or checked baggage. Mercury is classified as a hazardous material by IATA, and this ban applies to both carry-on and the hold — the rule is the same worldwide. There is no exemption for medical use.

The ban is universal. Mercury thermometers are prohibited from both carry-on and checked baggage on commercial aircraft in every region we cover, because the restriction comes from IATA's Dangerous Goods Regulations, which all member airlines follow. A digital thermometer — including an infrared forehead model — faces no restrictions anywhere and is the straightforward alternative.

No — the prohibition is not based on the risk of breakage during screening but on the classification of mercury as a dangerous good that cannot be transported by air. A sealed case does not change the classification. Officers at the checkpoint will not accept packaging as a reason to allow it through, and airline ground staff will also refuse it at check-in.

Replace it with a digital thermometer before you fly — modern digital models are equally accurate and widely available. Many destinations sell them locally if you prefer to travel without one. If you need a specific type of medical thermometer for clinical reasons, check with your airline before travel; the answer will still be no for mercury, but they can advise on approved alternatives.