Definition of terms – Labconco Class I Enclosure Models 3980423 User Manual
Page 34
Chapter 5: Appropriate Applications for Your Filtered Enclosure
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Odor Control Carbon Filter Applications
(sold as an accessory)
Release of low concentrations of vapors effectively adsorbed or treated in
carbon based filters.
Treatment of low-level carcinogens or suspected carcinogens. (See Chemical
Carcinogens in Chapter 5)
Procedures that may have traditionally been done on the open bench (low
levels only).
Odoriferous chemicals that are an unpleasant nuisance.
Other applications, not fitting the above guidelines, would be better suited with the
exhaust ducted to the outside. The exhaust connection kit (See Chapter 3 and
Chapter 7) can be added to the filtered enclosures for ducting to the outside.
Labconco also manufactures fume hoods and Class II Biological Safety Cabinets
for exhausting to the outside. Consult Labconco product specialist for additional
information.
REFERENCES TO NIOSH OR OSHA GUIDELINES AND
REGULATIONS APPLY TO ANY WORK PLACE UNDER THE
JURISDICTION OF THE U.S. DEPARTMENT OF LABOR.
OTHER COUNTRIES OUTSIDE THE U.S. HAVE
ESTABLISHED STANDARDS, WHICH MAY DIFFER
SLIGHTLY FROM THOSE USED AS GUIDELINES FOR THIS
PRODUCT. IT IS THE USER’S RESPONSIBILITY TO
BECOME AWARE OF LOCAL REGULATIONS GOVERNING
THE SAFE USE AND DISPOSAL OF CHEMICALS, CARBON
AND HEPA FILTERS. KNOWLEDGE OF ESTABLISHED
SAFE EXPOSURE LEVELS IS IMPERATIVE TO THE PROPER
USE OF FILTERED ENCLOSURES.
Definition of Terms
NIOSH – National Institute for Occupational Safety and Health/Mine Safety and
Health Administration. (U.S.A.)
TWA – Recommended Exposure Limits expressed as a Time Weighted Average.
The exposure limit for that chemical for up to a 10-hour workday, 40 hours a
week. Expressed in units of parts per million or milligrams per cubic meter.
Odor Threshold – The value in parts per million or milligrams per cubic meter for
which one might expect to smell a chemical’s presence in the air. This value is
very subjective and detection will vary with the sensitivity of one’s nose. The
period of time until the odor threshold is reached in the exhaust stream can be
estimated from Labconco exclusive computerized filter modeling program.
Contact Labconco on carbon filter life for specific applications. See Chapter 6.