planimeter vs measuring device

planimeter and measuring device both are nouns.

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

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

planimeter: a measuring instrument for measuring the area of an irregular plane figure
measuring device: instrument that shows the extent or amount or quantity or degree of something

Other hypernyms of planimeter include measuring instrument, measuring system.

planimeter (noun)	measuring device (noun)
a measuring instrument for measuring the area of an irregular plane figure	instrument that shows the extent or amount or quantity or degree of something