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Difference between Sensor and Transducer

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In this article, we will see the difference between a sensor and a transducer. But we will see what are sensors and transducers so that we can understand the concept then we will jump into differences.

What is a Sensor?

The sensor is the device that detects the changes in the environment. It can be a temperature sensor, pressure sensor, or Humidity sensor. As we Know sensors sense just like eyes and ears Sensor measured information (data being sensed) shall be sent to the processor or controller for them to work on it.

What is Transducer?

A Transducer is a device that transforms energy from one form to another. It also transforms a non-electrical physical into an electrical signal. It provides output response to specific input measured which may be physical quantity. 

Difference between Sensor and Transducer

Sensor Transducer
A device that converts physical parameters to electrical output. A device that converts energy from one form into another form is known as a Transducer.
The word Sensor comes from the USA. The word Transducer comes from Europe.
The use of a Sensor is for sensing the element itself. The uses of transducers are for sensing elements and also for circuitry.
In the Sensor its resistance changes with temperature. In Transducers its resistance changes with in voltage.
All the sensors are not transducers. All Transducers do not contain a Sensor. They use it as a mechanism but do not always rely on it.
It is a sensor when it responds to a stimulus. It becomes a transducer when connected to a bridge circuit.
It detects change in physical stimulus and turn it into a signal. It transfers power from one system to another in the same or in a different form.
Examples of Sensors: Temperature Sensors, and Proximity Sensor. Example of Transducer: Strain gauges, and Piezoelectric Transducers.

Last Updated : 27 Mar, 2024
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