hygrometer vs measuring system

hygrometer and measuring system both are nouns.

Word	Noun	Adjective	Verb	Adverb
hygrometer	Yes	No	No	No
measuring system	Yes	No	No	No

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

hygrometer: measuring instrument for measuring the relative humidity of the atmosphere
measuring system: instrument that shows the extent or amount or quantity or degree of something

Other hypernyms of hygrometer include measuring device, measuring instrument.

hygrometer (noun)	measuring system (noun)
measuring instrument for measuring the relative humidity of the atmosphere	instrument that shows the extent or amount or quantity or degree of something