Check the upper temperature limit
Candy syrup can exceed the range of meat-focused instruments. Use the thermometer only if the manufacturer lists a range that covers the recipe's target.
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Guide
Sometimes, but only when its range, probe design and instructions cover candy temperatures. A clip-on candy thermometer is usually easier and safer for hot syrup.

Candy syrup can exceed the range of meat-focused instruments. Use the thermometer only if the manufacturer lists a range that covers the recipe's target.
The sensing area must sit in the syrup without the probe touching the pan. Never immerse the display, connector or an unsealed section.
A candy thermometer normally clips to the pan for continuous reading. An instant-read meat thermometer may require careful hand-held checks, increasing exposure to steam and splashes.
It may be slow, bulky or shaped for deep liquid rather than a roast. Use it only if the range, sensing area, food-contact materials and maker's instructions fit the task.
Wash the food-contact probe as directed and avoid thermal shock. Residue can affect hygiene and make the scale harder to read.
Common questions
Yes, if its published range includes the recipe target and the permitted immersion depth keeps the display and connector clear of the syrup.
Possibly, but it must be suitable for penetration measurements and cover the required range. A purpose-built instant-read food thermometer is generally more practical.
No. Contact with the pan can produce a misleading reading; keep the sensing area in the syrup as the instructions specify.
It holds the sensing area at a consistent depth and keeps hands farther from hot syrup while the temperature rises.