Aerosol generator, This high-precision photometer for observing networks measures the optical properties of the atmosphere ( sun, sky, moon and soil reflectance) and provides quantification and physical-optical characterization of the aerosols.Due to its very low power consumption (MicroAmps) technology, to its self-powered system and to its most rugged design , the CE318 fully meets the operational requirements of continuous monitoring in terms of reliability, long lifetime and very low maintenance cost .The CE318 photometer technology is constantly enhanced to match the new technological challenges for climate observation and monitoring . The "Cimel" is still the benchmark device for most aerosol observing networks and more specifically for the international federation of AERONET networks.