||Evaluation of Personal Sampling Pumps in Sub-Zero Temperatures.
Parker, Carl D. ;
Lee, Martin B. ;
Sharpe., Joan C. ;
||Research Triangle Inst., Research Triangle Park, N.C.;National Inst. for Occupational Safety and Health, Cincinnati, Ohio. Div. of Physical Sciences and Engineering.;Environmental Protection Agency, Washington, D.C. Office of Energy, Minerals and Industry.
||PHS-NIOSH-210-74-0124; RTI-43U-1271; DHEW/PUB/NIOSH-78/117 ; EPA/600/7-77/145
Industrial hygiene ;
Environmental surveys ;
Coal dust ;
Low temperature tests ;
Electric batteries ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
Personal sampling pumps suitable for industrial hygiene surveys were evaluated to discover their characteristics as a function of temperature for temperatures between 25 and -50C. The pumps evaluated were significantly influenced by low temperatures. In general, most provided a sampling capability at -10 to -20C, but were marginal at lower temperatures. None were useful at -50C. Most of the pumps survived low temperature exposures to -50C without significant damage. The Nickel-Cadmium batteries which power these pumps are concluded to be the most suitable available. Although the energy available from these batteries is significantly reduced at low temperature, a large percentage of the nominal energy is available at -20C and some energy at -40C. These batteries are not useful at -50C. It is recommended that additional investigations be completed before standards for personal sampling pumps suitable for low temperatures are promulgated.