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Bio Aerosol Spectrometer 11-B

With the Grimm bio aerosol spectrometer 11-B you are on the pulse of the time!

Bio-Aerosol Spectrometer, Model 1209 front
Bio-Aerosol Spectrometer, Model 1209 with open impactor chamber
Bio-Aerosol Spectrometerr
Bio-Aerosol Spectrometer, Model 1209 with open impactor chamber and glass slide

Tracing bacteria with the Bio aerosol spectrometer 11-B

This portable aerosol measurement system was developed to detect the difference between biotic and abiotic particles fast and on the spot. A complete system allows to count and microscopically analyze the sample collected on the integrated object slide for bacteria.

The following 4 steps show how bacterial aerosol fractions (bacteria, fungal spores, pollen, etc.) are identified:

Step 1: measurement of particle concentration and particle size distribution (even the surface and mass) per laser spectrometry
Step 2: collection of all counted particles on a (prepared) object slide
Step 3: specific dye of the relevant biotic particles, e.g. for bacteria, bacterial spores or fungal spores with selective dying methods
Step 4: visualization and concentration evaluation with portable fluorescence-microscope (CCD camera and evaluation software)

11-B Basic device

Technically well-engineered and modularly expandable, the handy spectrometer is a globally popular and top class device. The aerosol spectrometer 11-B detects every single airborne particle (single particle count) from 0.25 to 32 µm in real-time with highest precision, and classifies them in 31 size channels. Every aerosol particle is detected in the optical measuring cell and allocated to a defined particle size, based on the intensity of the scattering light signal. In order to guarantee the precision of the measurement and to protect the measuring cell from impurities, part of the constant 1.2 l/min particle sample volume flow is filtered and brought back into the measuring device as rinsing air. The readiness for use of the model series 11-B is checked per self-test after each start-up.

By comparing the counted bacteria and the total optically measured ones, a correlation can be established, so that the respective size classes of the bacteria and their particle concentration can be defined.

Grimm’s specially developed user-friendly and high performance software 1178 tops off the whole profile.

Probing microorganisms:

You would like to know fast and on site which bacteria, fungal spores or pollen are in the ambient air? Grimm’s bio aerosol spectrometer gives you the right answer!

Unique characteristic of the portable bio aerosol spectrometer 11-B is the possibility of measuring the particle concentration and particle size distribution of biological aerosol fractions and their collection on a prepared object slide for precise identification.

The most important features of the model 11-B:

• Output of measuring data as particle count and dust mass fractions in 31 channels • Collection of all classified particles on a pre-treated glass object • Output of measurement results in real-time according to the European standard EN 481 (occupational health values: inhalable, thoracic, alveolar), and also the environmetal values PM10, PM2.5, PM1 (not mass specific) • Selftest for checking the readiness for use at each start-up • Permanent rinsing air for keeping the optical measuring cell clean is integrated


Universal Power supply for the spectrometer
RS 232 cable with
USB adapter
Special RS 232 cable, (for our spectrometer only)
Hard sided carrying case
Adapter for air velocity, temperature and humidity
Hard sided carrying case

Hydrophobia sample collection filter
Memory card, available as 1 MB or 4 MB version
ZERO count filter adapter, brings only clean air to the instrument

LabView® Software 1.178

With the new software 1.178 GRIMM programmed an excellent, user-friendly application software based on LabView®, which is compatible to all 32-/64-bit Windows operating systems from XP and up. PM10, PM2.5 and PM1 values are displayed numerically or graphically. Additionally, values of external climatic sensors and service data can be displayed.

The display and output of measuring data takes place in real-time (every 6 seconds) and is therefore suitable not only for data recording and data evaluation, but also for data presentation.

Start spectrometer and data storage
PM values over time
PM values as table
PM values as table
PM values as table
PM values as table
PM values as table
PM values as table
PM values as table
PM values as table