What is the difference between a sensor and a transducer??

Question

anonymous · Answer

I'm just guessing, yet from the notion of transducing, which implies changing one thing into another; the sensor would describe all thing that supplies a change in output (that can signal to a system) the matter to be sensed has presented itself.  The transducer is a class of sensors that use the energy of the source being sensed to generate such a signal.  Wikipedia may help you understand transducers better.

venomghost · Answer

I Believe a sensor is a type of transducer, the latter being a more generic term,Eg:  a microphone is an audio sensor, it tranduces sound into analog eletrical waves so it can be interpreted by an information processing system.

anonymous · Answer

I agree with the above, and will add: a sensor typically goes from the non-electrical world into the electrical world (like all of the examples given by the others above) but a transducer  just changes one form of signal into another.

A seismic sensor for instance, is understood to produce a change in voltage proportional to a seismic disturbance, but a seismic transducer could mean either that or a device that produces seismic energy given an input of electrical or pneumatic energy.

anonymous · Answer

thanks to all above...........