scaler vs pulse counter

scaler and pulse counter both are nouns.

Word	Noun	Adjective	Verb	Adverb
scaler	Yes	No	No	No
pulse counter	Yes	No	No	No

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

scaler: an electronic pulse counter used to count pulses that occur too rapidly to be recorded individually
pulse counter: an electronic counter that counts the number of electric pulses

scaler (noun)	pulse counter (noun)
an electronic pulse counter used to count pulses that occur too rapidly to be recorded individually	an electronic counter that counts the number of electric pulses