photocell vs transducer

photocell and transducer both are nouns.

Word	Noun	Adjective	Verb	Adverb
photocell	Yes	No	No	No
transducer	Yes	No	No	No

As nouns, transducer is a hypernym of photocell; that is, transducer is a word with a broader meaning than photocell:

photocell: a transducer used to detect and measure light and other radiations
transducer: an electrical device that converts one form of energy into another

Other hypernyms of photocell include detector, sensing element, sensor.

photocell (noun)	transducer (noun)
a transducer used to detect and measure light and other radiations	an electrical device that converts one form of energy into another