Aurora Nephelometer

Ecotech provides the broadest and most cost effective range of nephelometers on the market which can be found throughout the globe. The Aurora nephelometer range is easy to install, operate, maintain and service.

"The accuracy you need at the price you want"

The “new generation” of Aurora nephelometer is available in four models:

• Aurora 1000 Nephelometer (single wavelength)
• Aurora 2000 Nephelometer (PM2.5 correlation)
• Aurora 3000 Nephelometer (3 wavelengths with backscatter)
• Aurora 4000 Nephelometer (polar nephelometer)

What is a Nephelometer?

An integrating nephelometer provides a real-time, direct measurement of the light scattered by dust pollution in the air. Three wavelength nephelometers also measure ligh scattering but can also give information about total scattering and back scattering.

What is light scattering?

Light scattering is the measurement of particulates (dust/aerosol) in the air by shining light through sample air and measuring the deflected light (scattering). This light scattering allows us to measure the visibility of air (how far we can see) along with how much light is scattering back.

Why do we need nepheleometers?

Visibility measurements are important as they indicate how much pollution is in the air. Visibility shows how much Haze, Smog or Fog is present, a therefore determine how much pollution is in the air.

A good indicator of PM_2.5 mass measurement!

The nephelometer is known through numerous studies to track closely with PM_2.5 monitors. The nephelometer can be correlated with a mass monitor and used accurately to measure masses of PM_2.5 or lower.

Aerosols and Global warming

Investigations have provided much evidence that particles present in the air (aerosols) are affecting the radiation reaching the earth’s surface. This has direct implications on global warming and the increase of Global temperatures. Nephelometers measure light scattering and therefore is the perfect tool to study this aspect of global warming.

What different measurements can Nephelometers perform?

There are 3 different wavelengths that nephelometers can measure at (Green, Red and Blue) along with backscatter and polar measurements:

• Green:           525 nm – most sensitive for the human eye best measurement for smog, fog, haze
• Red:              635 nm - interacts strongly with large particulate matter (pollen, sea salt)
• Blue:              450 nm  - interacts strongly with fine and ultrafine particulates (wood fires, automobiles)
• Backscatter:    90-170° - measures the light reflectied back towards light source
• Polar:             40°, 70°, 99°, 128° (±15 for all) - measures scatter in 4 different segments