Testing of a personal-filter cassette with a circumferential orifice
A new personal filter cassette with circumferential orifices for personal inhalable-dust concentration measurements was tested using coal dust, and compared to standard closed face and open-face cassettes. The new cassette has four orifices separated by small posts with a slot-like geometry located circumferentially around the side of the cassette filter holder. The collection of coal dust was sampled in a laminar-flow chamber with the three types of cassettes at different orientations to the air flow. Uranine-tagged potassium biphthalate particles were used to test the uniformity of distribution on the filter surface. The test results indicated that the circumferential cassette appears to give a uniform distribution of dust across the filter surface. As this surface is protected like the surface in the closed-face cassette, this cassette may have some advantages over either of the other two.
- Research Organization:
- National Inst. for Occupational Safety and Health, Cincinnati, OH (USA)
- OSTI ID:
- 6508109
- Report Number(s):
- PB-87-164356/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
016000 -- Coal
Lignite
& Peat-- Health & Safety
42 ENGINEERING
420202* -- Engineering-- Protective Structures & Equipment
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
552000 -- Public Health
99 GENERAL AND MISCELLANEOUS
CARBONACEOUS MATERIALS
COAL
DUSTS
ENERGY SOURCES
FILTERS
FOSSIL FUELS
FUELS
HAZARDOUS MATERIALS
INDUSTRIAL MEDICINE
MATERIALS
MEDICINE
PERFORMANCE TESTING
QUALITY ASSURANCE
RESPIRATORS
TESTING
TOXICITY