IMPACTORS

H-PEM PM₁₀ and PM_2.5 Personal Impactor

The BGI H-PEM is a development of the Environmental Science and Engineering Group at the Harvard School of Public Health. It is a group of four impactors designed to be worn on the person in order to closely gage their exposure to PM_2.5 or PM₁₀ concentrations at 2 different flow rates. This results in four models. What makes this set of instruments so unique and superior to similar devices is the bold use of Silicone grease to capture the unwanted particles. The bias caused by particle bounce and the very questionable results obtained when impacting solid particles upon dry surfaces is completely eliminated.

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BGI 900 LPM High Volume Cascade Impactor

The origins of the Cascade Impactor begin with the wartime efforts of K.R. May at Porton England and A.A. Andersen at Dugway, UT. Subsequently, many other research scientists expanded our knowledge and understanding of the device, culminating in the work of Virgil Marple at the University of Minnesota in the 1960’s. From that time forward there were many minor variations but no real progress until a research group at the Harvard School of Public health seized a leadership position under the aegis of Prof. P. Koutrakis. Among their startling developments was the solution to the age old problem of high flow rates and particle bounce.

Applications

• Basic Aerosol Studies & Chemical Speciation
• Special Area Monitoring
• Particle Toxicology
• Particle Related Epidemiology
• Radiological Monitoring

Classical Polyorifice Cascade Impactors

Eight Stage Non Viable Impactor

Applications

• Basic Aerosol Studies
• Special Area Monitoring
• Pharmaceutical Studies
• Inhalation Research
• Evaluation of Metered Dose Inhaler products

Six Stage Viable (Microbiological) Impactor

Applications

• Aerobiology Studies
• Special Area Monitoring
• Infectious Studies
• Exposure Research.

Single Stage Viable (Microbiological) Impactor (NIOSH6 or N6)

Applications

• Aerobiology Studies
• Special Area Monitoring
• Infectious Studies
• Exposure Research.