Aurora NE-300

Integrating Nephelometer

The amount of sunlight reaching the Earth’s surface, rather than being scattered back to space, is an essential parameter to accurately model the influence of aerosol scattering on the Earth’s radiative balance.

The Acoem Aurora NE-300 contributes to this measurement by reporting both the integrated full and backscatter coefficients at 3 wavelengths.


Power with greater reliability & expandability
New, more powerful microcontroller significantly improves signal processing capabilities, speeds up operations and establishes a platform for greater future expandability
Accessibility with data at a touch
Intuitive menu system via large 7" colour touchscreen display
Speed with real-time remote monitoring
Enhanced connectivity with a standard network TCP/IP port, micro-SD card, USB port and RS232
Reliability with flow improvements
New integrated internal ball valve eliminates sample contamination
Accuracy with reduced truncation angle
Greater accuracy with reduced truncation angle & lower noise
Reliable performance in extreme conditions
Designed to perform in the toughest environment and take precise readings

See our technology in action

Schedule a free demo to get a first-hand look at how our solutions support your business.

3 Wavelength Integrating Nephelometer
with backscatter functionality

Using a LED light source, the Aurora NE-300 simultaneously measures at 450 nm (blue), 525 nm (green) and 635 nm (red) to enable wide and in-depth analysis of the interaction between light and aerosols.

The Aurora NE-300 includes backscatter measurements that allows both standard integrating measurements of 7 – 173° and also the backscatter 90 – 173°.

Key highlights:

  • High-powered LED light source increases measurement accuracy
  • Single light source & detector used for all wavelengths
  • Heat generated by the light source is reduced by using high efficiency LEDs & fans, minimising changes in sample RH
  • Easy automatic calibration ensures repeatability of measurement
  • Automatic optical reference calibration
  • Facilitates a wide measuring range (0 to 20,000 Mm-1).


  • Internal sample pump & flow sensor for accurate flow control with the option for volumetric flow control
  • Improved calibration process with span & zero gas following the same path into the cell as the ambient sample
  • Simplified automatic calibration using internal valves, ideal for remote locations
  • Fully programmable span check, zero check, span adjust, zero adjust or full calibration
  • Internal sample pump & flow sensor for accurate flow control with the option for volumetric flow control
  • Internal sample heater with temperature or RH control, you can enable to eliminate the effects of humidity
  • 24 VDC operation (120 W max with supplied mains power supply)
  • Fully integrated data logging of all parameters with storage to either USB or SD card for many years
  • Increased light source intensity & reduced truncation angle, lower instrument noise & decreased wall scattering from internal reflections compared to previous generation Aurora 3000
  • LED light source is guaranteed not to fail within 3 years, & often exceeds 5 years lifetime
  • LED light source uses the same light path for each wavelength ensures consistency of measurement, eliminating the need for multiple PMTs & band pass filters maximising light intensity
  • Storage & automatic backup of configuration & calibration files
  • Suitable for high-altitude applications.


  • Ambient Temperature & RH sensor for volumetric flow control
  • Roof flange, inlet extensions & rain cap with insect screen
  • Gas calibration kit & wall mount bracket
  • Annual service kit
  • Aerosol dryer
  • 20 lpm mass flow control option & external pump.


  • Backscatter & forward scatter studies
  • Scattering enhancement factor (e.g. in combination with the Acoem Aerosol Conditioning System ACS™ 1000)
  • Scattering Angstrom exponent calculations
  • Determination of single scattering albedo.

World-class aerosol monitoring & measurement

Around the world, atmospheric scientists and environmental agencies, rely on Acoem’s range of Aurora™ integrating nephelometers every day.

Accurate, flexible and easy to operate, they are also transportable and designed to cope with the demands of use in remote locations.

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