Chapter 3 _______________________________________________________________ Installation
VAISALA _______________________________________________________________________ 47
Leak Screw Installation
When the probe cannot be installed directly in the pressurized process or
process pipe, a leak screw installation can be used.
In this installation method, you must install the DMT348 probe using a
fitting body with leak screw, see Figure 27 on page 42. A small sample
flow from the process goes through the probe and via the leak screw out
to atmospheric pressure enabling a fast response time although the probe
is not installed in the process.
0503-036
Figure 31
Probe in Leak Screw Installation
The numbers refer to Figure 31 above:
1 = Probe
2 = Filter
3
=
Ball of the ball valve
4 = Leak
screw
