Bought - Sold - Exchanged

Refurbished Biological Safety Cabinets

from American Instrument Exchange

We offer an extensive selection of biosafety cabinets from a range of manufacturers, including The Baker Company, Nuaire, Labconco, Thermo Scientific, and others, at a savings of up to 70% off the price of comparable new equipment.

Click here to view our current stock of bio hoods

But lower cost doesn’t mean lower quality: our reconditioned biological safety cabinets all come supplied with new HEPA filters installed by our skilled technicians. Each biosafety cabinet undergoes a complete inspection and a performance review, including inflow velocity measurements, downflow velocity measurements, and HEPA filter integrity testing, to ensure that the cabinet will meet NSF-49, OSHA, and the manufacturer’s operation specifications. We’re happy to provide decontamination documents and copies of test records prior to shipping. American Instrument Exchange also offers a 90 day warranty on all bio hoods and filters.

Types of Bio Safety Cabinets

Biological safety cabinets (also called BSCs, biosafety cabinets or bio hoods) are designed to provide three basic levels of protection: protecting personnel from harmful agents inside the cabinet; protecting products to avoid contamination of the work, experiment, or process; protecting the immediate environment from contaminants contained within the cabinet. These three levels are designated as Class I, Class II, and Class III, respectively. A chart below designates the NSF classifications for bio hoods.

NSF Classification


A1 (Class II, Type A)

70% air recirculated, 30% exhaust. 75fpm intake.

A2 (Class II, Type A/B3)

70% air recirculated, 30% exhaust. 100fpm intake.

B1 (Class II, Type B1)

40% air recirculated; 60% exhausted to duct/external. 100fpm intake.

B2 (Class II, Type B2)

0% air recirculated; 100% exhausted to duct/external. 100fpm intake.


Baker SG403 - One of our best sellers!

Labconco Delta Series Class II Type A/B3

All of the equipment shown on our website is in stock and available. Orders ship from our 30,000 square foot warehouse in Haverhill, MA. Our surplus lab equipment is reconditioned for many types of laboratories, including biotech, biomedical, medical research, chemical, pharmaceutical, and university and hospital research laboratories. We have been a reliable source for used laboratory and scientific equipment since 1969.

Call or email us today for pricing and information on
selecting a BSC for your lab!

Contact American Instrument Exchange, Inc.