Portable spectrometers

Compact and resistant design, combines all the advantages of previous and improved GRIMM portable aerosol spectrometers, this configuration places the current 11-D model at the forefront of portable aerosol spectrometers for inhalable, thoracic and respirable dust monitoring, PM values and particle number concentration. With optical detection, long battery life and simple and comfortable use. 11-D is the optimal solution for reliable, flexible and real-time measurements for aerosol research and indoor air quality, for example, in workplaces, inside vehicles or for process analysis.

Technical features

· Real-time monitoring of particle number, dust mass fractions and PM values.
· Additional information of particle number, particle surface, and dust mass distribution
· 31 equidistant size channels; PSL traceable
· Integrated 47 mm PTFE filter (GRIMM dual technology)
· Versatile data acquisition and communication interfaces (Bluetooth, USB, Ethernet, RS-232)
· Air purge for protecting laser and optical cell detector
· Optical cell with internal sensor for temperature (T) and relative humidity (RH)
· Total inlet flow (1.2 L/min) analyzed in optical cell
· Self-check of all optical and pneumatic components for high quality standards
· Dust fractions measurement parameters according to EN 481 (inhalable, thoracic, respirable)
· TSP, PM10, PM4, PM2.5, PM1 i PMcoarse
· Dust mass number concentration and size distribution 0 – 100 000 μg/m3
· Particle size range 0.253 - 35.15 μm
· 31 canals of equidistant size
· Particle number 0 – 3 000 000 w/L, diluter available for higher concentrations
· Reproducibility > 97% of the total measurement range, according to ISO 21501-1
· Detection principle of light scattering at single particles with diode laser;
· Aerodynamic aerosol focusing, no border zone error
· Fast signal processing detector, 2 x 16 channels of raw data
· Time resolution 6 s, 31 channels (selectable storage intervals) 1 s, 16 channels (0.253 - 2.982 μm or 2.982 - 35.15 μm)
· Volume flow rate 1.2 L/min, ± 3% constant due to self-regulation, according to ISO 21501-1; automatic altitude correction up to 5000 m
· Internal purge air flow 0.4 L / min that protects laser optics.
· Gravimetric control
· 47 mm PTFE filter


· For measuring indoor air quality (IAQ) in buildings and vehicles
· For the measurement of PM2.5 in indoor environments according to VDI 4300, part 11
· For process control in industry
· Workplace monitoring (inhalable, thoracic, respirable) according to EN 481
· Permissible exposure limit (PEL) monitoring with high time resolution
· Measures of dust pollution

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