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Guide
Which type of thermometer checks the surface temperature of food? An infrared thermometer does, without touching the food. Use a probe thermometer instead when you need the internal temperature for doneness or food safety.
A food-safe infrared thermometer reads infrared energy from the surface and displays a temperature without making contact. It is useful for quick scans of griddles, pans, chilled displays, packaged foods, and the outside of food, but it does not reveal the temperature at the center.
Use infrared when the decision depends on an exposed surface: checking whether a cooking surface is evenly heated, spotting temperature differences across equipment, or screening several areas quickly. Follow the device instructions for distance and aim, because the reading covers an area rather than a single invisible point.
A purpose-built infrared food thermometer can scan both food and equipment surfaces within the limits stated by its manufacturer. Reflective metal, steam, grease, glass, and an incorrect measuring distance can distort a reading, so keep the lens clean and measure the actual target surface rather than through a barrier.
A hot exterior can surround a cooler center. The FDA advises checking the internal temperature of meat and poultry with a food thermometer, and its inspection guidance warns that an infrared surface reading alone may miss problems below the surface. Insert a suitable probe into the thickest part and avoid bone or the cooking pan.
Choose infrared for non-contact surface checks, an instant-read probe for quick internal checks, and a leave-in probe when you want to monitor food during cooking. Thin foods need a probe designed for shallow insertion; large roasts and poultry require careful placement in the thickest edible area.
Look for a model intended for food or kitchen surfaces, with a stated operating range, distance-to-spot guidance, adjustable emissivity if your tasks require it, and cleaning instructions suited to a busy kitchen. The best choice is the one whose measurement range and target area match the surfaces you actually check.
Common questions
An infrared thermometer checks surface temperature without touching the food. It cannot measure the food's internal temperature.
The best type depends on the task: infrared for surfaces, instant-read probes for quick internal checks, and leave-in probes for monitoring during cooking. For doneness and safety, use a probe that reaches the food's center.
Digital probe thermometers are commonly used because they check internal food temperature directly. Infrared thermometers are useful supplementary tools for rapid surface screening.
A digital probe thermometer is the broadly useful choice for checking food internally. Surface-only jobs call for an infrared thermometer instead.
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.