BGI Incorporated offers in aerosol science and technology, ambient particulate sampling, industrial hygiene, gas sampling and related fields. The company was founded in 1971 for the purpose of developing and manufacturing instruments for the sampling of airborne particulates. Its capabilities range from the submicron fraction (Pollak nuclei counter) to 100 micrometers (high volume samplers). BGI owns patents on a CN counter, the variable resistance calibrator for high volume and a valve for gas sampling bags. Additionally, the company focuses on occupational health, ambient particulate pollution, aerosol generation and toxicology. BGI s products are wide ranging in the aerosol field, including ambient monitoring, industrial hygiene, air flow calibrators, IAQ instruments, BGI cyclones, draeger, filter media and aerosol generation and collection. Its cyclones come in a variety of styles, as well as customized and made-to-order. Headquartered in Waltham, Mass., BGI s facility is ISO 9001:2001 certified.