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Guide
Yes, if it is specifically a leave-in, oven-safe thermometer. Instant-read thermometers normally go into the food only for a brief check.
You can put an oven-safe dial thermometer or the designated probe of a leave-in digital thermometer in the food during cooking. Do not leave an instant-read body, handheld display or wireless base in the oven unless its manual explicitly allows it.
Look for explicit oven-safe or leave-in language and a published temperature limit. On wired models, the metal probe and heat-resistant cable enter the oven while the electronic display stays outside.
Aim the sensing area at the thickest edible section. Avoid bone, the pan and large pockets of fat because they can give a misleading picture of the coldest part.
Use the oven door or probe port only as directed. Keep the cable away from heating elements, flame and sharp edges, and do not force the door onto a thick connector.
Near the end, check several locations with an instant-read thermometer when the shape is irregular. Follow the applicable safe-temperature guidance and any required rest time.
Common questions
Usually not. Use it for a short check unless the manufacturer identifies that exact model as oven-safe and leave-in capable.
The oven-rated probe and cable can on a leave-in model; its display generally remains outside. Follow the model's stated limits.
A leave-in probe can be positioned before cooking. A handheld instant-read tool is inserted near the expected finish and removed after each reading.
The reading may not represent the coldest edible portion. Reposition it into the thickest meat and verify in another spot.
Keep exploring
Use a leave-in probe to track the cook and an instant-read model to check more than one spot before serving.
A fast, thin probe works well for portions; a heat-safe leave-in probe makes a whole roast easier to monitor.
A fast instant-read probe is the most practical choice for steaks; insert it from the side into the center.
Start with a dependable instant-read thermometer; add a leave-in or wireless probe when you want continuous monitoring.