What type of thermometer should be used to check the internal temperature of a beef roast?

The appropriate thermometer for checking the internal temperature of a beef roast is a penetration thermometer, which is specifically designed to measure temperatures deep inside food. This type of thermometer has a sharp probe that allows it to be inserted into the thickest part of the meat, providing an accurate reading of its internal temperature. This is particularly crucial for large cuts of meat, such as a beef roast, where surface temperature may not reflect the true internal temperature necessary for safe cooking.

Infrared thermometers measure surface temperatures and do not provide insights into the internal temperature of foods, making them unsuitable for this task. Probe thermometers can refer to various types, including those that are both dial or digital. While a probe thermometer may be accurate for checking a roast, the term "penetration thermometer" is more specific to the type designed for deep measurement. Dial thermometers can also be used, but they may take longer to register an accurate internal temperature, and their readings could be less precise in thick meats compared to dedicated penetration thermometers. Thus, the penetration thermometer stands out as the best choice for ensuring the safety and proper cooking of a beef roast.