Laboratory evaluation of the Leitz Tyndallometer TM-Digital
- 1 January 1977
- report
- Published by Office of Scientific and Technical Information (OSTI)
Abstract
A laboratory study was conducted to evaluate a new instantaneous reading respirable dust monitor. This instrument, known as the Leitz Tyndallometer TM-Digital, operates on the light-scattering principle and has evolved from a less sophisticated instrument that has been on the market for some years. The instrument provides outputs for use of a recorder or printer and has instantaneous reading capability as well. The scattering angle and light source have been chosen so that the instrument is not sensitive to particles above 10 ..mu..m in diameter. Measurements made with the TM-Digital using test aerosols of coal, limestone, and Arizona road dusts were compared to simultaneous measurements obtained with approved personal respirable coal mine dust samplers. A linear relationship was found between measurements obtained with the TM-Digital and the personal respirable dust samplers that was independent of dust composition and size. The TM-Digital underestimated the respirable dust concentration by about 20%.Keywords
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