Question

Sensor is a ...............

• A. Communication device
• B. Control device
• C. Transducer
• D. Switch

Hint:

Remember that all sensors are transducers because they convert one form of energy to another.
However, not all transducers are sensors; some are actuators (which convert electrical sigls back into physical movement or heat).

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
In industrial process control and automation (such as temperature, pressure, and flow monitoring in food processing), sensors are used to measure physical parameters.

Step 2: Detailed Explation:
A sensor is a device that detects a physical, chemical, or biological property (such as temperature, pressure, light, or concentration) and converts it into a measurable sigl, typically an electrical voltage or current.
By definition, a transducer is any device that converts energy from one physical form to another.
Because a sensor converts a physical input (like heat energy or mechanical pressure) into an electrical output sigl, it is fundamentally classified as a transducer.
While sensors can be used as part of control systems, they do not perform the control action themselves, meaning they are not control devices.
They also differ from communication devices (which transmit data) and switches (which are simple biry state controllers).

Step 3: Fil Answer
Therefore, a sensor is fundamentally a transducer.