What is a key feature of bimetallic stemmed thermometers?

A key feature of bimetallic stemmed thermometers is their ability to accurately measure the temperature of larger or thicker foods. The design of these thermometers includes a metal probe with a sensing area that extends several inches along the stem, allowing them to provide a reliable reading even in the center of larger food items, such as roasts or large portions of meat. This makes them particularly useful in commercial kitchens where food safety is crucial and where thicker foods need to be cooked to correct temperatures to ensure safety.

The other options do not accurately reflect the capabilities or characteristics of bimetallic stemmed thermometers. For instance, the idea that they are limited to only thin foods overlooks their versatility and design. Additionally, claiming they cannot be used in hot or cold holding units is incorrect since they are effective for monitoring food temperatures in various settings. Lastly, stating that they are electronic and require batteries is misleading, as traditional bimetallic thermometers operate mechanically without the need for power sources.