5
Please note:
With particularly critical and expensive products, we recommend the
installation of a second measuring instrument with the option to monitor with a switch
contact for especially critical and expensive products for safety reasons.
Directly in the compressed air system
Screw in probe with G ½" thread pressure-tight
in the centre or in the compressed air pipe
where the measurement is to take place.
Ensure that the measurement is carried out
close to the compressed air flow. U-bend pipes
or non-flowing compressed air result in very
slow reaction times for the moisture reading.
Installation is recommended following drying of
the compressed air and all bypass pipes or for
critical compressed air users.
Indirectly in the compressed air system
Screw in probe with the G ½" thread in the
measuring chamber. Connect measuring cham-
ber with the compressed air pipe using a ball
valve and possibly a diffusion-tight connection
pipe (max. 5m). In the case of compressed air
containing oil and dirt particles, a 40µm pre-fil-
ter should be installed in front of the measuring
chamber. Compressed air flows continuously
(at 7 bar, approx. 1 l/min. expanded) in the
capillary pipe of the measuring chamber. The
reaction times for the humidity reading are
shorter than when directly mounted.
Advantage:
Easy mounting and dismounting of
the probe, fast adaptation time
.
Measurable gases:
In general humidity can be measured in all non-
corrosive gases. Before carrying out measure-
ments in corrosive gases please contact
Donaldson Filtration Germany.
UDM
3
00
UDM 300
INSTALLATION
