24
4 Mounting
VEGAPULS SR 68 • 4 … 20 mA/HART - two-wire
38294-EN-160707
Information:
The spacer may only be incorporated up to a maximum of 50 mm into
the vessel insulation. Only then is a reliable temperature decoupling
guaranteed.
max. 50 mm (1.97"
)
1
2
3
Fig. 19: Mounting the instrument on insulated vessels.
1 Electronics housing
2 Spacer
3 Vessel insulation
For level measurements in concrete silos, the sensors are often
mounted in protective boxes. These boxes can be for example metal-
lic, closed subsurface enclosures.
1
2
Fig. 20: Mounting of the instrument in an subsurface enclosure
1 Subsurface enclosure
2 Concrete bottom
For this application, the minimal amounts of stray radiation from the
sensor can be reflected and strengthened by the walls of the subsur
-
face enclosures. In the case of sensors with plastic housings, this can
lead to coupling disturbances. This can be avoided by using a sensor
with aluminium or stainless steel housing.
Installation in subsurface
enclosures