Class II cabinet

Class II cabinet

A Class II Cabinet or microbiological safety cabinet is a piece of laboratory equipment that provides a safe working area for people handling material potentially contaminated with pathogens.

The principle of operation involves using a fan mounted in the top of the cabinet to draw a curtain of sterile air over the products that are being handled. The air is then drawn underneath the work surface and back up to the top of the cabinet where it passes through filters (HEPA filters) that are capable of removing harmful bacteria and viruses. Seventy percent of the air is continuously recirculated in this way, while 30 percent is exhausted through another HEPA filter in the top of the cabinet. The air that is exhausted is made up by air being drawn into the front of the cabinet underneath the worksurface. The air being drawn in acts as a barrier to potentially contaminated air coming back out to the operator.

"Class II" refers to the NSF classification of this type of cabinet. Subdivisions within this class based on airflow patterns inside the cabinet and acceptable uses include A1, A2, B1, B2. Older pre-2002 NSF designations include A/B3 and others.


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Class of Cabinet des Médailles 218 — Herakles fighting Geryon. Circa 520/510 BC. Louvre. The term Class of Cabinet des Médailles 218, or Class of Cab. Méd. 218 or Class of C.M. 218 described both a group of Attic black figure vase painters, and a type of vase they produced. They… …   Wikipedia

  • Class II — may refer to: Class II appliance Class II bacteriocin Class II cabinet Class II gene Class II PI 3 kinases Class II railroad Class II star MHC class II This disambiguation page lists articles associated with the same ti …   Wikipedia

  • Cabinet making — is the practice of utilizing various woodworking skills to create cabinets, shelving and furniture. Cabinet making involves techniques such as creating appropriate joints, dados, bevels, chamfers and shelving systems, the use of finishing tools… …   Wikipedia

  • Class I — may refer to: Class I appliance, a device constructed according to electrical grounding specifications in the IEC 60536 2 standard Class I bacteriocin, a type of toxin produced by some bacteria Class I biosafety cabinet Class I laser, a type of… …   Wikipedia

  • Class president — A class president is usually the leader of a student body class, and presides over its class cabinet or organization within a student council, in a grade school class presidents are generally elected by the class, a constituency composed of all… …   Wikipedia

  • Class President — A Class President is usually the leader of a student body class and presides over its class cabinet or organization within a Student Council in an elementary, junior high, high school, or college. Class Presidents are generally elected by the… …   Wikipedia

  • Class actions — Recours collectif Pour les articles homonymes, voir Action de groupe. Un recours collectif ou une action de groupe (« class action » en anglais) est une action en justice qui permet à un grand nombre de personnes, des consommateurs le… …   Wikipédia en Français

  • Cabinet of curiosities — For other uses, see Cabinet of curiosities (disambiguation). Musei Wormiani Historia , the frontispiece from the Museum Wormianum depicting Ole Worm s cabinet of curiosities. A cabinet of curiosities was an encyclopedic collection in Renaissance… …   Wikipedia

  • Cabinet of Japan — The nihongo|Cabinet|内閣|Naikaku is the executive branch of the government of Japan. It consists of the Prime Minister and up to fourteen other members, called Ministers of State. The Prime Minister is designated by the Diet, and the remaining… …   Wikipedia

  • Biosafety cabinet — A microbiologist performing influenza research within a biosafety cabinet Acronym BSC Other names Biological safety cabinet, microbiological safety cabinet Uses Bioc …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”