Another name for a sensor is a _____.

A sensor is commonly referred to as a transducer. This term captures the essence of what a sensor does; it converts a physical quantity, such as temperature, pressure, or light, into a signal that can be measured or recorded. In this context, transducers can be electronic devices or mechanical systems that respond to various stimuli and provide an output signal proportionate to the input.

For instance, a thermocouple is a type of temperature sensor that acts as a transducer by converting temperature differences into an electrical voltage. The concept of transduction is central to understanding how sensors operate in instrumentation and control systems. Therefore, knowing the term "transducer" is essential in the context of sensors in instrumentation.