Dual wavelength Photo-Thermal Aerosol Absorption monitor (PTAAM-2λ)


Measurement wavelengths: 450 nm & 808 nm

Method: photo-thermal interferometry

Time resolution: 1 s

LOD @ 450 nm, 1 s: 4 Mm-1

LOD @ 808 nm, 1 s: 2 Mm-1

LOD @ 450 nm, 15 min: 0.2 Mm-1

LOD @ 808 nm, 15 min: 0.1 Mm-1

Accuracy better than 2%

Sample flow: 0.4 lpm

Size (length x width x height):
105 cm x 72 cm x 45 cm

Weight: 48 kg

Calibration interval: 3 months

Pump lasers lifetime: 2 years

Probe laser lifetime: 3 years

Warranty: 1 year

Patented: EP 3 492 905, other patents pending

CLAP Filter Absorption Photometer for Mobile Applications


Aerosol light absorption coefficient monitor

Ideal for mobile and laboratory use

Measurement wavelengths: 467, 529, 653 nm

Time resolution: 1 second

Sample flow: 1 l/min, volumetric

Noise at all wavelengths: approx. 0.25 Mm-1 (st. dev.), 60 s avg., filtered air

Number of sample/reference spots: 8/2

Filter: 47 mm filter, Azumi 371M

Dimensions (L x W x H): 10 cm x 10 cm x 16 cm, excluding connectors

Weight: 1.4 kg

Power consumption: max 20 W, 1.5 A at 12 V DC

Communications: serial, 9 pin RS232 male connector cable, 57600 baud 8N



FP Filter Photometer


Black carbon and aerosol absorption monitor

Measurement wavelengths: 470, 530, 660, 880 nm

time resolution: 1s/1min

sample flow: 0.05 – 0.5 lpm

sensitivity: 30 ng/m3 BC at 1 min time resolution,  0.5lpm sample flow

data transfer: USB thumb drive, data aquisition using  RS232, ethernet

size/weight: 19″; rack mountable/20 kg

filter: Azumi 371M

About Us

Haze Instruments is a high-tech start-up developing measurement methods and instrumentation to determine aerosol properties, focusing on their optical properties. The employees have a long history in this field and have developed and used the globally most popular filter absorption photometer. They are integrated in public research institutions and have led extensive measurement campaigns and international projects, where instrument performance was put to the limit in contrasted environments.

Dr. Griša Močnik Director of Research

Dr. Močnik has been developing methods to measure absorption since starting his PhD. He has been the director and director of research and development of the globally leading enterprise working on the instrumentation for measurement of aerosol absorption. He has been a principal investigator of international and national research and development projects, mentoring graduate and post-graduate students and teaches at universities. His current research includes source apportionment of carbonaceous aerosol for local studies and in context of long range transport; aerosol vertical profiles; and measurement methods. He served as a member of the United Nations ECE expert group on Black Carbon. He is a member of the editorial board for the journal “Aerosol Science and Engineering”.

Dr. Luka Drinovec Director of Development

Dr. Drinovec is a physicist with a PhD in physical biology, working on optical measurement instrumentation in the fields of environmental science for the last 20 years. His leadership of start-up and mature development teams in the last decade has produced new measurement method and instrumentation, especially the development and operational demonstration in scientific context of the instrument for the measurement of black and brown carbon and aerosol absorption. He is an active researcher at Jozef Stefan Institute in Ljubljana, and has led national and international projects in the field of aerosol science, focusing on optical properties of carbonaceous aerosols and mineral dust.

Blaž Žibert Mechanical Engineer

Blaž Žibert is a graduate of the Faculty of Mechanical Engineering with several years of experiences in design, mechatronics and R&D. Holds 6Sigma Green Belt certification and has obtained many experiences in the fields of manufacturing and quality control of products.


Drinovec, L., Močnik, G., Zotter, P., Prévôt, A. S. H., Ruckstuhl, C., Coz, E., Rupakheti, M., Sciare, J., Müller, T., Wiedensohler, A., and Hansen, A. D. A.: The “dual-spot” Aethalometer: an improved measurement of aerosol black carbon with real-time loading compensation, Atmos. Meas. Tech., 8, 1965-1979, https://doi.org/10.5194/amt-8-1965-2015, 2015.

Herich, H., Gianini, M.F.D., Piot, C., Močnik, G., Jaffrezo, J.-L., Besombes, J.-L., Prévôt, A.S.H., Hueglin, C., Overview of the impact of wood burning emissions on carbonaceous aerosols and PM in large parts of the Alpine region, Atmos. Environ., 89, 64-75, https://doi.org/10.1016/j.atmosenv.2014.02.008, 2014.

Invernizzi, G., Ruprecht, A., Mazza, R., De , C.Marco, Močnik, G., Sioutas, C., Westerdahl, D., Measurement of black carbon concentration as an indicator of air quality benefits of traffic restriction policies within the ecopass zone in Milan, Italy, Atmos. Environ., 45, 3522-3527, https://doi.org/10.1016/j.atmosenv.2011.04.008, 2011.

Kumar, N. K., Corbin, J. C., Bruns, E. A., Massabó, D., Slowik, J. G., Drinovec, L., Močnik, G., Prati, P., Vlachou, A., Baltensperger, U., Gysel, M., El-Haddad, I., and Prévôt, A. S. H.: Production of particulate brown carbon during atmospheric aging of residential wood-burning emissions, Atmos. Chem. Phys., 18, 17843-17861, https://doi.org/10.5194/acp-18-17843-2018, 2018.

Platt, S. M., El Haddad, I., Zardini, A. A., Clairotte, M., Astorga, C., Wolf, R., Slowik, J. G., Temime-Roussel, B., Marchand, N., Ježek, I., Drinovec, L., Močnik, G., Möhler, O., Richter, R., Barmet, P., Bianchi, F., Baltensperger, U., and Prévôt, A. S. H.: Secondary organic aerosol formation from gasoline vehicle emissions in a new mobile environmental reaction chamber, Atmos. Chem. Phys., 13, 9141-9158, https://doi.org/10.5194/acp-13-9141-2013, 2013.

Zotter, P., Herich, H., Gysel, M., El-Haddad, I., Zhang, Y., Močnik, G., Hüglin, C., Baltensperger, U., Szidat, S., and Prévôt, A. S. H.: Evaluation of the absorption Ångström exponents for traffic and wood burning in the Aethalometer-based source apportionment using radiocarbon measurements of ambient aerosol, Atmos. Chem. Phys., 17, 4229-4249, https://doi.org/10.5194/acp-17-4229-2017, 2017.

The development of the Filter Photometer was co-financed by the Republic of Slovenia and
the European Union from the European Regional Development Fund.
Naložbo sofinancirata Republika Slovenija in Evropska unija iz Evropskega sklada za
regionalni razvoj.

Contact Us

Haze Instruments d.o.o.
Dermotova ulica 6
1000 Ljubljana, Slovenia