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Perform real-time light absorption and black carbon measurements using light transmission through a filter with the Tricolour Absorption Photometer (TAP). The TAP measures light absorption at three wavelengths by particles deposited on a filter. By assuming a mass extinction efficiency, the ambient mass loadings of black carbon can also be determined. The TAP has been deployed at Global Aerosol Watch sites around the world for many years, demonstrating good agreement with other simultaneously deployed filter-based light absorption methods.
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Detailed Specs
- Fully characterized and field tested
- Low maintenance
- Up to 84 days of unattended operation at a PM2.5 loading of 10ug/m3 and an aerosol single scatter albedo of 0.95
- Extremely compact – fits inside a 16 cm cube
- Only 5 minutes required to change filter
- Sample flow rate (volumetric): 2 lpm
- Wavelengths: 467, 528, 652 nm (365 nm UV option)
- Filter media: Glass fibre, 47 mm diameter
- Noise (standard deviation of 60 sec averages on filtered air): +/- 0.2 Mm-1 (0.02 μg/m3 black carbon mass)
- Number of sample spots: 8
- Number of reference spots: 2
- Power consumption: 36 W
- Supply voltage: 100-230 VAC
- Operating temperature range 15-35°C
- Dimensions: 16 x 11 x 11.5 cm
- Weight : 1.6 kg
- Mounting holes: x4, 6-32 tapped holes on bottom (8.57 x 11.11 cm apart)
