2502 Series
6
Figure 6. Caged Sensor Mounting
DRAIN
CENTER OF
LIQUID OR
INTERFACE
LEVEL
DF5379-A
A6771/IL
SHUTOFF
VALVES
VENT
EQUALIZING
LINE
CAUTION
Since a displacer used in an interface
level or a density application must be
completely submerged during opera-
tion, obtaining desired controller sensi-
tivity requires the use of either a thin-
wall torque tube or an overweight
displacer, or both. An overweight dis-
placer cannot be used for any service
except those conditions for which it was
specified.
Note
If the controller is not mounted on the
sensor, refer to the Installing Controller
on Sensor section. That section also
provides instructions for adding a heat
insulator to a unit. If the sensor has a
temperature-compensated displacer or
piezometer ring, refer to the special
constructions procedures in this sec-
tion before proceeding.
Attach a cageless sensor to a flanged connection on
the vessel as shown in figure 7. For interface or liquid
level applications, install a gauge glass on the vessel.
Figure 7. Cageless Sensor Mounting
CF5380-A
A3893/IL
TOP
MOUNTED
W0645-1
CAUTION
If the displacer is to be inserted into the
vessel before being attached to the dis-
placer rod, provide a suitable means of
