What does a "load cell" measure in electrical instrumentation?

A load cell is a type of transducer that is specifically designed to measure weight or force. It operates by converting a mechanical force, such as the weight of an object, into an electrical signal. This is often achieved through strain gauge technology, where the deformation of a material under load changes its resistance. The change in resistance produces a measurable electrical output that is proportional to the force or weight being applied.

In contexts where weight or force measurement is critical, load cells are widely used in industrial settings, weighing scales, and laboratory applications. Their ability to provide precise and reliable measurements makes them invaluable in various fields, including manufacturing and automation.

Understanding load cells is crucial in electrical instrumentation as they play a significant role in ensuring accurate data collection and process control. Other options, while relevant to electrical measurements, do not pertain to the primary function of load cells.