★ Must-know
📌 A transducer is considered a sensor when it converts a measurable quantity such as acoustic pressure, optical intensity, or magnetic field into an electrical signal, but it is considered an actuator when it converts an electrical signal into sound or mechanical motion.
Further detail
A sensor converts a physical quantity into an electrical signal, whereas an actuator converts electricity into another form of energy.
1. What does a sensor typically produce when it detects a non-electrical physical phenomenon?
2. A device detects acoustic pressure and outputs a voltage, but another device receives a voltage and produces mechanical motion. How should these devices be classified?
3. What best defines a measurement chain?
What does a sensor convert into an electrical quantity?
A non-electrical physical phenomenon.
When is a transducer considered a sensor?
When it converts measurable quantities into electrical signals.
What is a measurement chain?
A set of devices or operations used to detect a physical quantity.
What is the role of an analog-to-digital converter in a measurement chain?
It converts the sensor's analog signal for digital signal processing.
Sensor role
Converts physical phenomena into electrical signals.
Transducer function
Converts one energy type into another.
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