Difference Between Transducer and Sensor

Transducers and sensors are used in various appliances and gadgets but there is a difference between transducer and sensor which needs to be understood. A transducer is a device that is used to convert a non-electrical signal into an electrical signal whereas the sensor is used to measure the physical changes that occur in the surroundings like temperature, light, etc and convert it into a readable signal. Examples of sensors are a barometer, accelerometer whereas thermocouple is an example of transducers. The transducer consists of a sensor and signals conditioning circuits and finds application in communication systems to convert the electricity to electromagnetic waves.

Difference Between Transducer and Sensor

Some difference between Transducer and Sensor is mentioned below:

There are different types of sensors available and can be used for remote sensing such as the most general example such as the motion sensor which is used in numerous systems such as automatic doors, security lights. These send some kind of signals like ultrasonic waves, microwaves or light beams and senses when there is an interruption in the flow. The type of input or output transducer being used depends upon the kind of signal sensed or controlled.

Following is the table explaining transducer vs sensor:

Difference Between Transducer and Sensor
Transducer Sensor
It helps in converting one form of energy into another form. It senses physical quantities and converts into signals which are read by an instrument.
It converts electricity to electromagnetic waves. It senses physical quantity and converts into analogue quantity.
The antenna is one type of transducer. Microphone and loudspeaker are also of one type. One type of Sensor is LED. Sensors used in automobiles to detect touch and activate the siren.
It converts the measured quantity into a standard electrical signal like -10 to +10V DC It is used to measure voltage, capacitance, inductance, ohmic resistance.
Interested to learn the difference between the other concepts of Physics, below are the links:
LCD stands for Light Emitting Diode which is a p-n junction device with high resolution, whereas LCD stands for Liquid Crystal Display and is an optical device with low resolution. Read more>>
Reflection is the phenomenon of light where the light rebounds after hitting the surface whereas refraction is the phenomenon of light where the light ray bends as it passes through two mediums. Read more>>

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Practise This Question

Two cars A and B are moving with the same speed v as shown below.

With respect to car A, car B is: