1977
Optical attenuation method developed
1979
Aethalometer concept developed; research prototype
198O
First field test, first publication
1980
Measurements of BC at remote locations as tracer for long-range atmospheric circulation
1986
Recognition of importance of BC as tracer for the adverse health effects of diesel exhaust
1996
Manufacturing starts in Slovenia under OEM contract: AE16 (1 wavelength); AE21 (2 wavelengths); AE31 (7 wavelengths)
2OOO
Recognition of importance of BC aerosols for climate change forcing
2OO1
US EPA / ETV approval of AE31 Aethalometer
2OO7
Aerosol Co. founded in Slovenia for development of Aethalometers
2OO9
Development of “MicroAeth”