tach vs measuring device

tach and measuring device both are nouns.

Word	Noun	Adjective	Verb	Adverb
tach	Yes	No	No	No
measuring device	Yes	No	No	No

As nouns, measuring device is a hypernym of tach; that is, measuring device is a word with a broader meaning than tach:

tach: measuring instrument for indicating speed of rotation
measuring device: instrument that shows the extent or amount or quantity or degree of something

Other hypernyms of tach include measuring instrument, measuring system.

tach (noun)	measuring device (noun)
measuring instrument for indicating speed of rotation	instrument that shows the extent or amount or quantity or degree of something