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WATER CONTENT

Measuring WATER in hydraulic and lubricating fluids

In minerial oils and non-aqueous fire resistant fluids water is undesirable. Mineral oil usually has a water content of 50-300ppm which it can support without adverse consequences.

Once the water content exceeds about 500ppm the oil starts to appear hazy.
Above this level there is a danger of free water accumulating in the system in areas of low flow.
This can lead to corrosion and accelerated wear.

Similarly, fire resistant fluids have a natural water content which may be different to mineral oil.

(From North Notts Fluid Power Centre)

 

PML2-W Fluid System monitoring product

PML2-W - the in-line fluid contamination monitor.

The PML2-W incorporates

•   In-line particle counter calibrated inline           with ISO11171
•   Moisture sensor measuring % saturation           of water (RH)
•   Fluid temperature measurement

The PML2-W is designed to work up to 400 bar working pressure.

Moisture sensor
The PML2-W provides accurate and repeatable measurements of the % saturation of water. Different oils have different saturation levels and % saturation (RH) is the best and most practical measurement. These results can be converted to PPM (parts per million), if the oil type saturation/temperature characteristics are known.

The moisture sensor is temperature compensated and the PML2-W gives a constant readout of fluid temperature.

The product can be PC/PLC controlled with an optional remote display module.

The moisture sensor consists of a humidity and temperature sensor enclosed in a specifically designed free-flow housing.

The sensor is calibrated in accordance with ISO/IEC-17025.
 


REMOTE DISPLAY OPTION FOR THE PML2 AND PML2-W

 

 

PML2-W
- additional FEATURES

•   Moisture sensor-measuring percentage         saturation of water.- % RH (relative         humidity)
•   Fluid temperature measurement.
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INSTALLATION DETAIL

The PML2 in-line PARTICLE COUNTER DESIGN 30 + 31

The permanent in-line twin laser particle counter is designed for all hydraulic applications, where continuous monitoring is essential.

The PML2 incorporates the LPA2 technology and is designed to work continuously and automatically in most hydraulic industries and applications.

RS 485 Digital BUS
Red/green alarm
Customer specific
protocol on request
PLC output

RS 232 output for
display of
cleanliness code

19/17/15
19/17/15

PML2
FEATURES

•   Cast aluminium powder coated case
•   Continuous self diagnostics
•   Standard RS 232
•   Eight channel analysis
•   ISO 4406, NAS 1638, SAE 4059
•   Test time flexibility
•   Operation by laptop or specified                 customers protocol
•   Permanently installed

DESIGN 30

Inlet pressure: 2 bar to 400 bar
Drain reservoir/system: Atmospheric,
zero back pressure

 

DESIGN 31

Inlet pressure: 10 bar to 400 bar
Drain reservoir/system: Back pressure
not exceeding 1 bar

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