Where is the sensing portion of a bi-metallic stem thermometer located?

The sensing portion of a bi-metallic stem thermometer is located at the dimple and downward. This positioning is essential for accurately measuring temperatures. The dimple indicates the point where the internal sensing element begins, and this is where the metal inside the thermometer expands or contracts in response to temperature changes. The stem of the thermometer is designed to be inserted into the food or liquid, ensuring that the tip and dimple are submerged in the material being measured for an accurate reading.

This design allows the thermometer to provide reliable readings across a range of temperatures. Proper handling and placement are crucial; if the sensing portion is not positioned correctly, it may lead to erroneous readings and potentially unsafe food handling practices. The other options refer to locations that do not encompass the critical sensing mechanism, resulting in inaccurate temperature assessment.