Model 11-R
GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 77 von 83
7.4 Sample collector
To minimise the measuring error during sample collection, make sure the difference between the speed
of the aerosol being measured and the speed of the aerosol at the intake of the measuring device is as
close to zero as possible. This sample collection for particle measurement is called isokinetic partial
flow sampling.
Since the dust and particle measuring devices are equipped with volume flow control (1.2 l/min or 72
l/h), the suction speed can be determined exactly by the geometry of the sample collector.
A suitable sample collector should therefore be used according to the application. GRIMM offers the
following models:
7.4.1 Radially symmetrical suction head (model 1111)
APPLICATION: For indoor measurements (IAQ) and outdoor
air measurements up to air movement of approx. 2.5 m/s from
various directions. The radially symmetrical suction head
complies with Directive EN 481 for workplace measurements and
guarantees a suction speed of 1.25 m/s at the opening.
Removing the suction head from the integrated holder on the device
Figure 7-4: Suction head stor-
age
For transportation, store the suction head in the
internal holder.
To remove it, slide the thumb under the lowest ring
of the suction head and push it out of the holder.
Never grasp it by the top ring.
Figure 7-5: Removing the suction head
Figure 7-3 Suction head
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