crystal counter vs counter tube

crystal counter and counter tube both are nouns.

Word	Noun	Adjective	Verb	Adverb
crystal counter	Yes	No	No	No
counter tube	Yes	No	No	No

As nouns, counter tube is a hypernym of crystal counter; that is, counter tube is a word with a broader meaning than crystal counter:

crystal counter: a counter tube in which an ionizing event increases conductivity
counter tube: a measuring instrument for counting individual ionizing events

crystal counter (noun)	counter tube (noun)
a counter tube in which an ionizing event increases conductivity	a measuring instrument for counting individual ionizing events