American Ecotech - Model Aurora 3000 -3 Wavelength Integrating Nephelometer

Using a LED light source, the Aurora™ 3000 simultaneously measures at 525 nm (green), 450 nm (blue) and 635 nm (red) to enable wide and in-depth analysis of the interaction between light and aerosols.

The ECOTECH Aurora™ 3000 includes backscatter measurements that allows both standard integrating measurements of 9 - 170° and also the back scatter 90 - 170°.

• Studies on backscatter and forward scatter
• Scattering enhancement factor (eg. in combination with the ECOTECH ACS)
• Scattering Ǻngstrσm exponent calculations
• Determination of single scattering albedo.

• High powered LED light source increases measurement accuracy
• Single light source and detector used for all wave-lengths
• Heat generated by the LED light source is a fraction of that generated by a flash lamp, minimising changes in sample RH
• Easy automatic calibration, ensures repeatability of measurement
• Automatic optical reference calibration
• Single light source and detector used for all wavelengths
• Facilitates a wide measuring range (0 to 20,000 Mm-1).

• Simplified automatic calibration using internal valves, ideal for remote locations
• Fully automatic zero check or adjust, automatic span check or automatic zero and span check available in intervals of 1, 3, 6, 12, 24 hrs or weekly
• Fully integrated package including internal sample pump, sample heater, internal calibration valves, zero air pump and data logger
• Internal sample heater with temperature or RH control, which can be enabled by the user to eliminate the effects of humidity (RH: < 30 to < 90 % )
• 12 VDC operation (60 watts max, 14 watts nominal)
• Holds up to 33 days of 5 minute data averages or 6 days of 1 min data.

• Our LED light source is guaranteed not to fail within 3 years, and often exceeds 5 years compared to a flash lamp that is recommended to be changed every 4 - 6 months
• LEDs emit light at a specific wavelength eliminating the need for band pass filters
• An LED light source uses the same light path for each wavelength ensuring consistency of measurement, eliminating the need for multiple PMTs and maximising light intensity.

• Measurjed parameters:
• Light scattering coefficient (o ) at (450,525 and 635 nm)
• Backscatter coefficient (bo ) at (450, 525 and 635 nm)
• Ranges: 0.0 to > 20,000 Mnr`
• Lower detectable limit: < 0.3 Mnr` full and back scatter (60 second averaged data) (0.1 Mm" optional)
• Secondary measurements: Sample air temperature, RH and pressure. Enclosure temperature
• Intensity function:
• Full scatter 9 -170 °C
• Back scatter 90 -170 °C, parameterised by Mueller et al, 2010
• Flow rate:
• =5 SLPM with defaut blower.
• Higher flow can be obtained using the external pump option (e.g. in case of common inlet)
• Operating temperature: - 20 to 45 °C
• Operating RH: 10 to 95 %
• Calibration: Span gas available for C02, SF6, FM-200, R-12, R-22, R-134 or a user defined gas
• Optics: Reference light source measurement
• Light source: Stable LED light source (US patent 7,671,988)
• Wavelength: 525 nm (green), 450 nm (blue), 635 nm (red)
• Operating voltage: 12 VDC (incl 110 - 240 VAC 50/60 Hz power converter) (14 watts nominal, 45 watts with heater active)
• Dimensions: 170 x 700 x 215 mm
• Weight: 11.2 kg

• Outputs: 4 analog outputs (2 voltage & 2 current) and 2 x RS232 serial ports
• Filtering: Kalman (digital adaptive filter), moving average (30 seconds) or no filter
• Stored parameters: Date & Time, 0 (635,525 and 450 nm), Air temperature, Enclosure temperature, RH, Pressure instrument status
• Capacity: Maximum of 33 days of 5 minute averages, or 6 days of 1 minute averaged data

• Fully automatic zero and span calibrations
• Low power internal 12 V sample heater
• Long lasting low power LED light source
• No bandpass filters to be replaced
• Easy to clean measurement cell.

• External pump control
• Sample bypass valve used in conjunction with external pump plate kit
• Roof flange kit and rain cap with insect screen
• Gas calibration kit and wall mount bracket.