Weather Barometer or Thermometer (Mercury)

Carry On Bags: Yes (Special Instructions)
Checked Bags: No

Weather Barometer or Thermometer (Mercury)

These devices contain more mercury than consumer devices and may only be carried by a representative of a government weather bureau or similar agency in carry-on baggage.

The individual must advise the airline of the presence of the mercury barometer or thermometer in the carry-on baggage.

The thermometer must be transported in 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. See FAA regulations

 The final decision rests with the TSA officer on whether an item is allowed through the checkpoint.