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Personal Air Sampling

Personal Air Sampling. Introduction & History. Goal of Personal Sampling. Collect an air sample representative of a worker’s Breathing Zone. Representative Air Sample. Conducted over the entire work shift Collects air around the worker’s face Doesn’t get in the way of doing the job

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Personal Air Sampling

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  1. Personal Air Sampling Introduction & History

  2. Goal of Personal Sampling • Collect an air sample representative of a worker’sBreathing Zone

  3. Representative Air Sample • Conducted over theentire work shift • Collects air aroundthe worker’s face • Doesn’t get in the wayof doing the job • Provides a reliableflow rate & volume

  4. Personal Sampling History The first personal air samplers were developed for sampling coal mine workers for coal dust exposure in underground coal mines.

  5. Timeline: US Agencies • 1910 Bureau of Mines • 1913 Department of Labor • 1915 Public Health Service • ************************* • 1969 MSHA • 1970 OSHA & EPA

  6. Earliest Sampling • The earliest personal monitoring was done with a manual pump, hand-operated by a second person • The pump was developed by the US Bureau of Mines in 1937, and collected the dust in a water medium using impingers.

  7. First Battery Operated Personal Monitoring Pumps • In 1957 the first battery operated personal pumps were used, made under contract for the US Bureau of Mines • Sampling is now collected onto filters, using size selective cyclones

  8. Personal Pump History • 1937- Hand operated pump for US coal mines • 1957 – First battery operated personal monitoring pumps used in US coal mines • 1962 – Commercial pumps first sold in US & Europe • 1973 – Low flow pump & sorbent tubes • 1975 – Constant flow pumps • 1976 – High/Low flow combo pumps • 1980 – Digital calibrators • 1982 – High/Low/Constant Flow pump

  9. Personal Air Sampling Pumps • Personal Pump High Flow • Flow rates from 1 to 5 LPM • Examples: Lead, Asbestos, Dust • Accessories: Filters, Cyclones, Impingers

  10. MSHA 30 CFR Part 74Coal Dust Sample Requirements • Size and weight limitations • Air exhausts inside the case • On-off switch & flow control protected • Pulsation control • Battery operated & charged in place • Visual flow rate indicator • Flow control to +/- 5%

  11. Personal High Flow Pump

  12. Personal Air Sampling Pumps Personal Pump Low Flow • Flow Rates from 20 to 300cc/min • Examples: Hydrocarbon Solvents (Benzene) Chlorinated Solvents (Methylene Chloride) & Alcohols • Accessories: Sorbent Tubes (Charcoal Tubes)

  13. Personal Low Flow Pump

  14. Personal Air Sampling Pumps Constant Flow Control • Works like the cruise control on a car • Senses when the flow rate is trying to drop and speeds up the pump • Maintains the flow rate at ± 5% of set flow

  15. Personal Air Sampling Pumps Multi-flow Low Flow Pumps • Constant pressure control allows two to four simultaneous samples using special manifolds • A constant low pressure level is maintained in the connection tubing • Flow rate is controlled with a needle valve on each tube holder

  16. Universal Tube Holder System

  17. Constant Flow vs. Constant Pressure

  18. Sampling Accessories Filter Cassettes Impingers Cyclone Samplers Charcoal Tubes

  19. Sorbent Tubes

  20. Three-piece Filter Cassette

  21. Personal Cyclone Sampler

  22. Calibration Setup with Filter Cassette

  23. Air Sampling Pump Calibration

  24. Primary Air Flow Calibrator Measures airflow using a Measured volume

  25. Secondary Air Flow Calibrator Gauge to measure flow. Requires comparative validation

  26. NIST Traceable Documented trail to National Institute for Science & Technology

  27. Cyclone Calibration Jar

  28. Multi-flow Calibration

  29. Back Pressure

  30. Measuring Back Pressure

  31. IH Timeline • 1939 – AIHA founded • 1970 – OSHA, NIOSH, EPA • 1984 – Asbestos Act • 1990s – Industry downsizing • 1999-2000 – Slow industry recovery

  32. AIHA Membership • 1939 – 160 members • 1970 – 1650 members • 1980 – 5000 members • 1985 – 6300 members • 1991 – 10,000 members • 1996 – 12,500 members • 2011 - 10,240 members

  33. Personal Pump Trends • 1960s – Make it work • 1970s – Make it smaller • 1980s – Add features • 1990s – Better value • 2000s – Make it smarter

  34. Thank You www.Sensidyne.com 800-451-9444 / 727-530-3602

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