pedometer vs measuring device

pedometer and measuring device both are nouns.

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

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

pedometer: measuring instrument for recording the number of steps taken in walking
measuring device: instrument that shows the extent or amount or quantity or degree of something

Other hypernyms of pedometer include measuring instrument, measuring system.

pedometer (noun)	measuring device (noun)
measuring instrument for recording the number of steps taken in walking	instrument that shows the extent or amount or quantity or degree of something