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2 Product description
MINITRAC 31 • Foundation Fieldbus
62076-EN-190704
The measured value is detected contactlessly right through the vessel
wall. Neither a process fitting nor a vessel opening are required. The
instrument is thus ideal for retro installation.
The instrument can be used for many different measuring tasks. Apart
from the main applications such as density measurement and level
detection, the MINITRAC 31 can also detect residues and the mass
flow rate in conjunction with a flow meter.
1
2
3
4
Fig. 2: MINITRAC 31 - Application possibilities
1 Level measurement - Residue detection
2 Point level detection
3 Density measurement
4 Mass flow measurement
Further application possibilities are also the use as X-ray alarm or real
value correction.
If X-ray alarm is selected, the instrument detects radiation from exter-
nal sources. Possible external radiation sources can be, for example,
a weld joint test in a neighbouring facility or other radiometric instru-
ments.
When the instrument operates as real value correction it transmits the
real value to correct another radiometric sensor. The measurement
can thus be adapted perfectly to the situation in the vessel.
In radiometric measurement, a Caesium-137 or Cobalt-60 isotope
emits focussed gamma rays that are attenuated when penetrating
the tube wall and the medium. The NaI detector on the opposite side,
on a pipeline for example, receives the radiation. The intensity of the
Functional principle
