APCG logo
 
Aerosol Monitoring Station (AMS)
Back Print Content Send page with e-mail
Aerosol Monitoring Station (AMS)

AMS Instrumentation

nephelometer

Nephelometer

The Radiance Research Nephelometer M903 measures aerosol light scattering extinction coefficient (σsp) at a single wavelength (530nm), using the geometry of a standard integrating nephelometer. The light source is a variable rate flashlamp. Pressure and temperature sensors automatically correct for changes in air Rayleigh scattering. Relative Humidity is also monitored and recorded.

 

Particle / Soot Absorption Photometer (PSAP)

Particle / Soot Absorption PhotometerRadiance Research Particle Soot Absorption Photometer is a filter based instrument for measuring light absorption due to aerosol particles. The method is based on the integrating plate technique in which the change in optical transmission of a filter caused by particle deposition on the filter is related to the light absorption coefficient of the deposited particles using Beers Law. It operates in 3 wavelengths (470, 522 and 660 nm) resulting in a continuous, time resolved measurement of absorption coefficient.

Combining the measurements of these two instruments we can obtain the calculation of single scattering albedo, which is a key property in determining the radiative forcing resulting from aerosols. Single scattering albedo is defined as the ratio of scattering to extinction, where extinction is the sum of scattering and absorption.

 

Ozone

Thermo Scientific Model 49i Ozone AnalyzerThe Thermo Scientific Model 49i Ozone analyzer is a dual-cell, UV photometric gas analyzer for measurement of ambient air monitoring. It operates on the principle that ozone molecules absorb UV light at a wavelength of 254nm. It provides a continuous monitoring and the ozone measurements are from ppb levels up to 200ppm.

 
Back Top of the page Print Content