Identify the thermometer type
Look for explicit oven-safe or leave-in wording, not a metal probe alone.
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Guide
Some probes and dial thermometers can go in the oven; instant-read bodies generally cannot. The model instructions decide.

Look for explicit oven-safe or leave-in wording, not a metal probe alone.
A designated leave-in model does; an instant-read model is used only for checks.
Metal construction alone proves nothing. The dial, seals and sensor must all be rated for oven heat.
For a wired system, place the display outside and route the rated lead as instructed.
Do not use a split cable, cracked display or loose probe joint in heat.
Common questions
A designated leave-in model does; an instant-read model is used only for checks.
Metal construction alone proves nothing. The dial, seals and sensor must all be rated for oven heat.
For a wired system, place the display outside and route the rated lead as instructed.
Do not use a split cable, cracked display or loose probe joint in heat.