sampling station vs sampler

sampling station and sampler both are nouns.

Word	Noun	Adjective	Verb	Adverb
sampling station	Yes	No	No	No
sampler	Yes	No	No	No

As nouns, sampling station and sampler are synonyms defined as:

sampling station and sampler: an observation station that is set up to make sample observations of something

sampling station (noun)	sampler (noun)
an observation station that is set up to make sample observations of something	a piece of embroidery demonstrating skill with various stitches
	an observation station that is set up to make sample observations of something
	an assortment of various samples
	someone who samples food or drink for its quality