Water detection sensor WES04

Measure water in oil

Whether in hydraulic oils, diesel, vegetable oils, Skydrol or other user-specific fluids: the WES04 measures the water content up to the saturation limit under extreme conditions. Specially calibrated for your application and the oils and fluids used – especially when monitoring oil coolers or, for example, in underwater applications, large machines, drying and oil treatment plants, production plants for vegetable oils, hydraulic systems and much more.



How we measure success: Your advantages.

Custom calibration

Calibration on the user-specific fluids and requirements

Temperature compensation

Elimination of the influence of temperature changes on the measured value

High measuring accuracy

Through multi-point calibration and temperature compensation

Fast reaction time

Fast reaction to dew point change

High pressure and shock resistance

Patented pressure resistance up to 300 bar / shock resistant up to 10G

Long product life cycles

Designed for industrial use with long-term spare parts availability

Technology at a glance

See here how the water detection sensor is constructed and which components make up its functionality. We will be happy to show you more, live or online, during a consultation.

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Mission Oil Check:
the WES04

For all those who like to take a closer look. Our photo gallery shows you the product in detail, as a whole and from different perspectives and in different situations.

Technical information

Inline measurement of the absolute water content
The water detection sensor is designed for in-line measurement under special environmental conditions of absolute water content in ppm [mg/kg] below the saturation limit in mineral, ester, skydrol, silicone, vegetable, diesel, refrigeration, transformer, and insulating oils, among others, as well as in custom fluids.

Application areas

– Underwater applications
– Drying and oil treatment plants
– Production plants for vegetable oils
– Painting lines for automotive parts
– Oil cooler monitoring
– Hydraulic systems
– Refrigerator oil
– Hardening shops
– Aircraft industry
– Large machines

Suitable accessories

Mobile data logger P005

For temporary supply and readout of permanently installed sensors at locations without infrastructure.


How is the product maintained?

We recommend an annual recalibration and adjustment for all our sensors to be able to guarantee the exact functionality. We calibrate our sensors with state-of-the-art measurement technology in our in-house calibration laboratory. Our test equipment is one of the most accurate references in measurement and control technology. The test results are summarised in a factory calibration certificate in accordance with DIN EN ISO/IEC 17025:2018-03.