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User Manual MOP301 Digital Moisture in Oil Immersion Probe
4 Mounting and Installation
The probe can be installed in applications such as oil storages with almost non-moving oil or as well in
circulation pipes with moving oil.
Please note:
For installation in high voltage equipment, e.g. in power transformers, there may be the danger of electrical
shock. Always chose the installation depth so that the required safety distances between the MOP301
probe and any electrically live parts are respected.
If the MOP301 is installed in equipment with moving parts, e.g. in gears, it has to be ensured that the probe
does not touch any of these parts.
In moving oil, the mechanical stress on the probe is minimized by placing only the filter cap into the flow. In
systems with mechanical oil contaminants, the sensor may get installed only behind an appropiate filter.
Please note:
To maintain its integrity, the probe cable must not be routed over sharp edges. The cable’s
minimum bend radius is 5x the cable diameter in fixed installations and 10x the cable diameter when
occasionally flexing the cable.
When mounting an MOP301-T4 by means of ducts, make sure that precautions are taken to prevent the
sensor from shooting out. The internal ducting (to the electronics) is suitable for up to 20 bar
(290 psi)
. The
respective feedthrough determines the actual working pressure (<20 bar
(<290 psi)
). As a rule, non cross-
section-constricting and cross-section-constricting (cut-in) screw connections may be used; cross-section-
constricting screw connections are only permitted in the rear part as shown in the sketch below (grey area
from 32 + 150 mm from the probe tip; clamping is permitted in the grey marked area only, too).
32
(1.3)
150
(5.9)
▪ Cross-section-constricting screw connections
▪ Clamping zone
Probe cable
Fig. 4 MOP301 Type T4
4.1 Installation of the Probe Directly in the Process
stop valve
stop valve
1/2" ISO or 1/2" NPT
metal sealing ring (ISO)
inside diameter
≥
13.1 mm
(0.55")
Type T10 in fixed installation
Fig. 5 Installation of the MOP301 probe directly into the process
For direct probe installation, shut-off valves shall be placed on both sides of the probe insert. This allows
the sensor probe to be easily removed for maintenance and calibration.
For direct installation into a pressure chamber, make sure that the pressure in the chamber
and the ambient pressure are equal before removing the probe. The temperature during probe installation
may deviate by max. ±40 °C
(±72 °F)
from the regular temperature during normal operation.
