CPC G01F 23/045 (2013.01) [B08B 1/002 (2013.01)] | 20 Claims |
1. A device comprising:
a platform, the platform comprising;
a first aperture disposed within the platform,
a first channel disposed within the platform, wherein the first channel runs from an outside edge of the platform to an outside edge of the first aperture;
a wiper attached to the platform, the wiper comprising;
a second aperture disposed within the wiper, wherein the second aperture disposed within the wiper is smaller in size than the first aperture disposed within the platform, and
a second channel disposed within the wiper, wherein the second channel runs from an outside edge of the wiper to an outside edge of the second aperture.
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