Can I Bring Medical-Clinical Thermometer (Mercury) on a Plane to United States?
Medical-Clinical Thermometer (Mercury)
Allowed
Checked only
According to TSA guidelines, checked only. One small thermometer per passenger. Must be in protective case. Digital and non-mercury thermometers are not restricted.
The final decision rests with the TSA officer on whether an item is allowed through the checkpoint. Official TSA Rules →
Quick Rule
Carry-on baggage
Not Permitted
Checked baggage
Restrictions Apply
TSA Officer
Makes the final decision
Source: Official TSA Regulations ↗Updated: May 20, 2026
Also known as
mercury thermometerglass mercury thermometerclinical thermometer mercuryfever thermometer mercury
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