Model 11-R
GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 79 von 83
7.4.3 Isokinetic duct probe for 2 to 25 m/s (model 1152)
APPLICATION: Sample collection for particle measurements from air shafts or ventilation ducts, before
or after filters, in supply and exhaust air systems.
This sample collector was developed especially for dust measurements in ventilation ducts. It can also
be used with over or underpressure up to 100 mbar thanks to the sample air return. The duct must be
equipped with an assembly opening that is 35 mm in diameter. With the scale on the sample collector
tube, measurements according to Association of German Engineers (VDI) 2066 can be taken quickly
and easily. If measurements are not taken at normal pressure, the sample volume may have to be con-
verted to standard cubic metres. Then the measurements have to be corrected accordingly.
The probe consists of the following components (see Figure 8-8):
(2) Four incoming flow nozzles for the speed ranges 2-4, 4-8, 8-16 and
16-25 m/s. The nozzle with the smallest opening is used for the
highest speed.
(3) 90° probe elbow
(4) Opening for sample air return discharge
(7) Tube holder
(8) Probe extension 250 mm, optional
(9) Connecting piece for connection to the measuring device and air
return 0.5 m hose 3*6 mm: optional extension for connection to the
measuring device
(10) Banjo fitting to connect the air return
Wrench 8/10 for nozzle replacement and attaching the banjo fitting
on the left side of the device. Also (1) air duct, (5) sample air to
measuring device, (6) exhaust air duct
Figure 7-7:Duct probe
Figure 7-8: Parts of
To Next Page
Loading...
Need help?
General