15
4 Mounting
MINITRAC 31 • 4 … 20 mA/HART - four-wire
40447-EN-130430
Density measurement
A density and concentration measurement is possible on pipelines
and vessels. The accuracy of the measurement increases in propor-
tion to the radiated length (L) of medium. This is particularly important
in the case of products with low density or small tube diameters.
There are different ways to increase the radiated length (L) of the
medium.
L
L
L
1
4
a
b
2
3
Fig. 5: Installation possibilities - Density measurement or concentration meas-
urement
1a Direct radiation - Horizontal mounting
1b Direct radiation - Vertical mouting or when the lead cover is used as protec-
tion against ambient radiation
2 Inclined radiation for extention of the radiated length (L)
3 Extension of the radiated length (L) by adding a tube angle piece as meas-
uring distance
4 Integrated lead cover as protection against ambient radiation - the instru-
ment is hence shielded laterally
