Sampling devices for detecting particulate contaminants

Details Sampling devices for detecting particulate contaminants Sampling devices for detecting particulate contaminants

G - Physics

01

T

358/5

G01T 1/167 (2006.01) G01T 7/04 (2006.01)

Patent

CA 1163380

Abstract Disclosed are sampling devices for detecting particulate contaminants, particularly radioactive particulate contaminants, in a gaseous medium, such as air. The devices use filters comprising a filter membrane sandwiched between two pieces of plastic material having holes exposing the filter membrane to the gaseous medium. Each filter is moved between a sampling position at which the filter is exposed to the gaseous medium and a measurement position at which the amount of particulate material collected by the filter can be measured. In the measurement position, a gas-tight seal may be formed with the plastic surrounding the filter medium so that the chamber holding the filter may be evacuated for measurement of radio- active particles. The filter may be moved linearly or rotationally. The detector may comprise a detector of radio- active particles.

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