Can I Bring Weather Barometer or Thermometer (Mercury) on a Plane to United States?
Weather Barometer or Thermometer (Mercury)
Allowed
Carry-on only
According to TSA guidelines, carry-on only — restricted to representatives of a government weather bureau or similar agency. Airline must be advised of its presence. Must be in sealed, leak-proof, puncture-resistant packaging impervious to mercury.
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
Restrictions Apply
Checked baggage
Not Permitted
TSA Officer
Makes the final decision
Source: Official TSA Regulations ↗Updated: May 20, 2026
Also known as
mercury barometerweather barometermercury weather thermometermercury weather deviceaneroid barometer mercury
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