Aurora 2000 PM correlation nephelometer

User friendly and easy to maintain, the Aurora 2000 makes PM_2.5 correlation studies simple and easy to perform. The Aurora 2000 is part of the ‘new generation’ nephelometers using a single wavelength to measure particulate scattering. The Aurora is available in two configurations:

Configured with a PM_2.5 Size selective inlet (SSI) to sample PM_2.5, Ideal in areas with stable aerosol chemistry
Configured to communicate directly with a beta attenuation particulate monitor providing 1 minute PM corrected data, ideal in areas with multiple aerosol sources

View product page at www.ecotech.com

pm_correlation_nephelometer

Features

New high powered LED light source increasing accuracy and reliability (red 635nm, blue 450nm or green 525nm)
Compact and portable (light weight)
Smart heater for controlling relative humidity of sampled air
Reduced power consumption and a lower carbon footprint due to:
- Low powered internal heater
- New 12v power source
Automated instrument calibration using zero and span gas
Pressure and temperature reporting

Specifications - Aurora 2000 PM correlation nephelometer

Range:

LDL:

Temperature range:

Sample flow rate:

Weight:

Dimensions:

Power

0.00 to >20 000Mm^-1

0-1000 ug/m³

0.3 Mm^-1

0.5 ug/m³

-20-40^oC

3 l/min approx

12 kg

170 x 700 x 215 mm (LxWxH)

100-240 VAC, 50/60 Hz or 12VDC

Comm ports include
- 4 analogue outputs (2 voltage & 2 current)
- RS232 multidrop
- RS232 serial port
- U.S. EPA compliance data for PM measurement
- Scattering coefficient (σ_scat)
- BAM1020 PM averages – 1 hour average only
- Corrected Real time 1 minute PM concentrations PM_aurora
- Sample Temperature, Relative Humidity and Barometric Pressure

Aurora 2000 PM_2.5 Nephelometer

The Aurora 2000 is available with automatic flow control and a PM2.5 Size Selective Inlet. This configuration improves the correlation between the Aurora 2000 and Federal Equivalent PM_2.5 Methods.

This sampling method enables a manual correction factor to be entered in order to derive real time (1 minute) PM_2.5 concentrations. In applications where the aerosol chemistry is stable this configuration provides excellent results with minimal maintenance and a high degree of correlation.

The Aurora Nephelometer employs a smart heater controlled by a relative humidity sensor, this allows the user to set the maximum relative humidity of the sampled air, eliminating the influence of water vapour on the measurement and thus performing a “dry measurement”.

Aurora 2000 Automatic correlating PM nephelometer

In applications where aerosol chemistry is subject to change, a correction factor derived from manual sampling may be unreliable.

The Automatic correlation PM nephelometer connects directly to the Met One BAM1020 in order to monitor and log PM hourly averages generated by a BAM1020 (PM_BAM). These hourly averages are compared to the Aurora’s hourly average scattering coefficient (σ_scat) and a scattering to PM coefficient factor (Coef_Scat/PM) is calculated. This factor is then applied to the next hour of 1 min scattering coefficients measured in order to determine a 1 minute average for PM concentrations (PM_aurora). This data can also be used to determine changes in aerosol source through deviations in light scattering from the expected values.

Aurora Nephelometer

Measuring aerosols through light scattering