Final answer:
The combination of a transducer and its signal conditioner is referred to as a 'sensor,' which functions to convert physical changes into measurable electrical signals.
Step-by-step explanation:
The combination of a transducer with its signal conditioner is known as a sensor. A transducer is a device that converts one form of energy into another, while a signal conditioner is an electronic circuit which manipulates the signal in a way that prepares it for the next stage of processing, often amplifying, filtering or converting the signal. Therefore, when paired together, they function to detect changes in the physical environment (such as temperature, pressure, or light) and convert them into an electrical signal that can be measured and processed, hence the collective term 'sensor' is used to describe this combination.