Digital Thermometer
Digital (non-mercury) thermometers are allowed in carry-on and checked baggage without restriction.
Carry-on
Allowed
Checked
Allowed
Carry-on details
Allowed. Digital, forehead, and ear thermometers are ordinary small electronics with no mercury and no liquid to restrict, so they can go in your carry-on without any special steps.
Checked-bag details
Allowed without restriction in checked baggage as well.
Special instructions
This applies to digital/electronic thermometers only. Old-style mercury glass thermometers are a different, restricted item — allowed only in checked baggage, one per passenger, in a protective case — so don't assume the same rule covers both.
FAQ
- Is a digital thermometer treated differently from a mercury thermometer?
- Yes. Digital thermometers have no restrictions, while old-style mercury glass thermometers are limited to one per passenger, in checked baggage only.
Related items
Source: TSA — What Can I Bring? · Last verified: 2026-07-30
Final decision rests with the security officer at the checkpoint.