sequencer vs apparatus

sequencer and apparatus both are nouns.

Word	Noun	Adjective	Verb	Adverb
sequencer	Yes	No	No	No
apparatus	Yes	No	No	No

As nouns, apparatus is a hypernym of sequencer; that is, apparatus is a word with a broader meaning than sequencer:

sequencer: (chemistry) an apparatus that can determine the sequence of monomers in a polymer
apparatus: equipment designed to serve a specific function

Other hypernyms of sequencer include setup.

sequencer (noun)	apparatus (noun)
computer hardware that sorts data or programs into a predetermined sequence	equipment designed to serve a specific function
(chemistry) an apparatus that can determine the sequence of monomers in a polymer	(anatomy) a group of body parts that work together to perform a given function