User's Guide _______________________________________________________________________
14 ___________________________________________________________________ M210397EN-D
Sampling from Pressurized
Processes
The maximum measurement pressure is 50 bar
a
/ 725 psi
a
(absolute
pressure) for sampling cell use. Pressure change between the process
and sampling point will change the dewpoint temperature resulting in
incorrect dewpoint reading. When sampling pressurized processes
above 50 bar, the pressure must be regulated to 50 bar or below and
the effect of the pressure difference between the process and the
measurement cell must be taken into account in calculating the
dewpoint.
The dewpoint measurement with the DRYCAP
®
sensor is not flow
sensitive but the flow rate affects the response time. The optimal flow
rate depends of the application but a minimum flow rate of 0.2 l/min is
recommended.
The DMT142 is very light in weight which means that it can be
installed in a sample pipeline in the sampling cells without the need of
any additional mechanical support.
Five different sampling cell options and an installation flange are
available.
DMT242SC Sampling Cell
0507-103
Figure 11
DMT242SC Sampling Cell
The following numebrs refer to Figure 11 above:
1 = G1/4"
2 = G3/8"
DMT242SC is the basic sample cell with G3/8" ISO gas inlet thread
and G1/4" ISO gas outlet thread.
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