cloud-drop sampler

cloud-drop sampler

[′klau̇d ‚dräp ′sam·plər]
(engineering)
An instrument for collecting cloud particles, consisting of a sampling plate or cylinder and a shutter, which is so arranged that the sampling surface is exposed to the cloud for a predetermined length of time; the sampling surface is covered with a material which either captures the cloud particles or leaves an impression characteristic of the impinging elements.