different between impinger vs impactor

English

impinge +? -er

impinger (plural impingers)

Any of several instruments in which fine particles (dust) in a gas are analysed by blowing them through a jet onto a wetted plate, prior to being counted. Typically used for particle analysis

impact +? -or

impactor (plural impactors)

Any of several machines or devices in which a part impacts on another, or on a material.
An object which impacts another.
Synonym: impactite

From French impacteur.

impactor n (plural impactoare)

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