Difference between sensor and transducer

@madhu27-Yq7VLh • Oct 26, 2024

Oct 26, 2024

1.3K

Hi CEans.......
I'm an instrumentation student and often confused with the difference between sensor and a transducer.
confused with many explanations i have entered into the conclusion that a transducer is a type of sensor which converts any physical quantity into electrical.Am i right?
someone please help me understand.
Also how does a transmitter differ from these?

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rahul69

@rahul69-97fAOs • Dec 20, 2012

In my opinion, the obvious difference is what each does,
A transducer converts one form of energy to another.
A sensor detects the incoming quantity (be it signal, temprature or anything).
A transmitter sends or broadcasts a quantity.
These generic definitions can be applied to any quantity desired as per need.
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yanivx

@yanivx-gvxfxa • Dec 24, 2012

rahul69
In my opinion, the obvious difference is what each does,
A transducer converts one form of energy to another.
A sensor detects the incoming quantity (be it signal, temprature or anything).
A transmitter sends or broadcasts a quantity.
These generic definitions can be applied to any quantity desired as per need.
hey Rahul you are almost there..... the definition of transducer is perfect but when you are talking about the sensors..... Transducer is a part of a sensor as in the case of pressure gauge the bourdon tube is the transducer that will convert pressure in to displacement. but the pressure gauge when connected with electrical cktary will be called as sensor.
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madhu27

@madhu27-Yq7VLh • Dec 27, 2012

Thanks for the reply....
To my knowledge, transducer converts any form of energy into electrical one.If that is true, a bourdon tube can't be a transducer.So i may be wrong😨.
If any form of energy is being converted into electrical one, what does it mean? a sensor or a transducer?😕
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Jaigopal Soni

@jaigopal-soni-tvd9fK • Jan 17, 2013

The words 'sensor' and 'transducer' are both widely used in the description of measurement systems. The former is popular in the USA whereas the latter has been used in Europe for many years. The word 'sensor' is derived from entire meaning 'to perceive' and 'transducer' is from transducer meaning 'to lead scross'. A dictionary definition of 'sensor' is `a device that detects a change in a physical stimulus and turns it into a signal which can be measured or recorded; a corresponding definition of 'transducer' is 'a device that transfers power from one system to another in the same or in the different form'.
A sensible distinction is to use 'sensor' for the sensing element itself and 'transducer' for the sensing element plus any associated circuitry. All transducers would thus contain a sensor and most (though not all) sensors would also be transducers.
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