美国BGI, Incorporated www.bgiusa.com
美国BGI公司的各种气溶胶采样器，是最早通过美国EPA认证的采样器，也是全球公认的质量最好的标准采样器；



BGI offers instrumental solutions in aerosol science and technology, ambient particulate sampling, industrial hygiene and air flow calibration. We are an ISO 9001:2008 certified company which mandates that every aspect of our work is under a strict quality standard. This includes: Design, Development, Production, Calibration Laboratory and Client Service. We are dedicated to quality, service and truth.

BGI, Incorporated was founded in 1971 for the purpose of developing and manufacturing instruments for the sampling of airborne particulates -- aerosols. Our sphere of interest has spanned the range from the submicron fraction (Pollak nuclei counter) to 100 micrometers (high volume samplers). The company owns patents on a C.N. counter, the variable resistance calibrator for hi-vols, a unique valve for gas sampling bags and a unique solution to keeping dust from contaminating the lenses of photometers.
The company's interests are wide ranging in the aerosol field, and include occupational health, ambient particulate pollution, aerosol generation, and toxicology.