Hear your absorption
A direct way of measuring the aerosol absorption coefficient using the photo acoustic effect. Measurements at up to four wavelengths enable a specific characterisation of the aerosol.
Specifications
Concept
Wavelengths
Acoustic resonator
Cell volume
Detection limit
Accuracy & Precision
Aerosol flow
Time resolution
Specific detection of the aerosol absorption on airborne particles in a single photoacoustic aerosol cell at multiple wavelengths
405 nm, 473 nm, 515 nm, 660 nm (other wavelengths possible on request)
Compact stainless steel cylindrical cavity with a fundamental acoustic frequency of 3200 Hz
236 cm (including acoustic buffer volumes)
5∙10 m (0.06 µg/m Black Carbon)
5% and 3%
0.5 - 1 lpm
0.4 s
3
-7
-1
References
Linke, C., Ibrahim, I., Schleicher, N., Hitzenberger, R., Andreae, M. O., Leisner, T., and Schnaiter, M., "A novel single-cavity three-wavelength photoacoustic spectrometer for atmospheric aerosol research", Atmospheric Measurement Techniques, 9, 5331-3346, 2016, doi:105194/amt-9-5331-2016.
Schnaiter, M., Linke, C., Ibrahim, I., Kiselev, A., Waitz, F., Leisner, T., Norra, S., and Rehm, T., "Specifying the light-absorbing properties of aerosol particles in fresh snow samples, collected at the Environmental Research Station Schneefernerhaus (UFS), Zugspitze.", Atmospheric Chemistry and Physics, 19, 10829-10844, 2019, doi:10.5194/acp-19-10829-2019.