You searched for: “impinger
impinger (s) (noun), impingers (pl)
A device that collects samples of suspended particles: An impinger gathers or sucks in a measured amount of dust from the air which is then discharges out in a stream of water against a wet glass surface. The dust particles adhere to the surface and are then counted.
This entry is located in the following unit: pung-, punc-, punct- (page 4)