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User Manual MOP301 Digital Moisture in Oil Immersion Probe
1 General
This user manual serves for ensuring proper handling and optimal functioning of the device. The user
manual shall be read before commissioning the equipment and it shall be provided to all staff involved
in transport, installation, operation, maintenance and repair. The user manual may not be used for the
purposes of competition without the written consent of E+E Elektronik and may not be forwarded to third
parties. Copies may be made for internal purposes. All information, technical data and diagrams included
in these instructions are based on the information available at the time of writing.
The manufacturer or his authorized agent can be only be held liable in case of willful or gross negligence.
In any case, the scope of liability is limited to the corresponding amount of the order issued to the
manufacturer. The manufacturer assumes no liability for damages incurred due to failure to comply with the
applicable regulations, operating instructions or the specified operating conditions. Consequential damages
are excluded from the liability.
Please find this document and further product information on our website at
1.1 Explanation of Symbols
This symbol indicates safety information.
It is essential that all safety information is strictly observed. Failure to comply with this information can lead
to personal injuries or damage to property. E+E Elektronik assumes no liability if this happens.
This symbol indicates instructions.
The instructions shall be observed in order to reach optimal performance of the device.
1.2 Safety Instructions
1.2.1 General Safety Instructions
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Avoid any unnecessary mechanical stress and inappropriate use.
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When replacing the filter cap make sure not to touch the sensing elements.
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The device must be operated with the filter cap on at all times.
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For sensor cleaning and filter cap replacement please see “Cleaning Instructions” at www.epluse.com
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Installation, electrical connection, maintenance and commissioning shall be performed by qualified
personnel only.
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Use the MOP301 only as intended and observe all technical specifications.
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The device is designed for operation with class III supply (EU) and class 2 supply (NA).
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Do not use MOP301 in explosive atmosphere or for measurement of aggressive gases.
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Do not apply the nominal voltage to the data lines.
The device is not appropriate for safety, emergency stop or other critical applications where device
malfunction or failure could cause injury to human beings.
1.2.2 Intended Use
The MOP301 is dedicated for reliable and accurate monitoring of lubrication, hydraulic and insulation oils
as well as diesel fuel. In addition to highly accurate measurement of water activity (aw) and temperature
(T), the MOP301 calculates the absolute water content (x) in ppm.
The probe can be used up to 120 °C
(248 °F)
, 20 bar
(290 psi)
and is available with either ISO or NPT slide
fitting, which allows for variable immersion depth. The mounting and installation methods described in
chapter 4 Mounting and Installation shall be used.
The manufacturer cannot be held responsible for damages as a result of incorrect handling, installation
and maintenance of the device.
Unauthorized modifications of the product lead to loss of all warranty claims. The device may only be
powered as described in this manual.
