Water in Oil Sensor NP330-F

Measuring Water in Oil
up to Saturation Limit.
Hydraulic Oil, Diesel, Vegetable Oil, Skydrol
Inline Measurement of the absolute Water Content
The water-in-oil sensor NP330-F is designed for the inline measurement of absolute water content in ppm [mg/kg] below the saturation limit in mineral, ester, skydrol, silicone, vegetable, diesel, refrigerating-machine, transformer and insulating oil as well as in customer-specific liquids.
Fields of Application (among others):
  • Oil Drying & Regeneration Plants
  • Production Plants for Vegetable Oils
  • Painting Plants for automotive parts
  • Oil Cooler Monitoring
  • Hydraulic Systems
  • Refrigerator Oil
  • Hardening Plant
Wide range of Accessories

  • Calibration to user oil and user-specific fluids
  • Multipoint calibration
  • Temperature compensated
  • Measuring accuracy ± 10 % of measured value
  • Factory calibration certificate according to DIN EN ISO/IEC 17025:2018-03
  • Quick reactivity
  • High pressure and shock resistance of the sensors
  • Design also for extreme applications (mil)
  • Diverse display, transmission and evaluation options
…Aerospace Industry

In addition to kerosene, another fluid is of elementary importance for the frictionless and safe operation of aircrafts: hydraulic oil!

With the help of hydraulic systems, it is possible to create, increase and transmit required mechanical forces. In this way, a wide variety of controls, which would not be possible without hydraulic support, can be ensured.
The system usually consists of a reservoir in which the hydraulic oil is located. Various lines lead out of this reservoir, to the motors which are controlled. Since the entire system on board is under pressure, a wide variety of pumps are required.

The hydraulics are not only used for the control surface on the wings, but also to actuate the landing flaps and airbrakes, the side rudder or landing gear.

It becomes clear: A failure of the hydraulic system can have devastating consequences.
Use of our sensors
Due to their chemical properties, certain (hydraulic) fluids are used in a hydraulic system. To ensure that there is no risk of failure and that the system can operate without any problems, clean, uncontaminated oil is the basic requirement.

Before filling the machines with the medium (e.g., Skydrol or HY JET V), certain quality characteristics must be checked, and all regulations must be strictly observed. The dryness of the oil is a decisive quality characteristic – the water content of the liquid must therefore be determined!

With the help of our very pressure and shock resistant water-in-oil sensor NP330-F this is a simplicity.
Our sensors always measure the absolute water content of the user medium reliably, continuously, accurately and in real time. This ensures that the hydraulic oil to be used meets the desired quality standards and can be used without any problems.
…Hardening Plants

In order to ensure a trouble-free quenching process in hardening plants, clean oil which does not contain any foreign moisture is the prerequisite.
Too much moisture in the oil can have a negative effect on cooling times and considerably reduce the cleanliness and quality of the workpieces.
However, a water penetration into quenching baths can never be completely avoided. It often happens, for example, that water gets into the oil used due to condensation (humidity, temperature fluctuations, etc., leaks (in pipes, coolers, etc.), incorrect storage, sprinkler systems, during refilling processes or cleaning work.
Consequences of Water Ingress
The consequences of water ingress are serious and diverse. Besides unevenly hardened workpieces, component distortion, cracks and soft spots, quenching properties such as cooling times and vapor skin phases can be affected negatively.
In addition, there can be an increased risk of splashing and foaming on the oil. A change in the flash point is also conceivable, which results in an increased risk of fire and explosions.
It becomes clear: In the worst case, an increased water content in the oil can lead to a fire in the hardening plant.
Use of our Sensors
By using our water in oil sensors the risks and negative consequences of water ingress can be avoided. Our sensors measure the absolute water content of the user oil continuously, reliably and accurately at all times. They are also characterized by high pressure and shock resistance.
If the water content in the oil exceeds the individually specified limit, the user is alerted. This enables him, in contrast to randomly carried out water content determinations, to react correctly and, above all, quickly.
By integrating the measurement into the oil circuit, the measurement is carried out in real time and the reaction can also take place immediately. The risk of not detecting an increase in water content between random measurements is eliminated.
The use of our sensors not only ensures that the quality of the workpieces is satisfactory and consistent, but also guarantees safety at the workplace, extends the service life of the oil and minimizes scrap and downtime.
…Oil Regeneration Plant

Consequences of Water in Oil
If water gets into oil, the consequences can be serious: Among other things, the water can weaken the physical properties of the oil, change its viscosity or reduce its protective properties and temperature resistance. Oil regeneration plants separate the water components, which have entered the oil circuit in various ways (leaks, through refilling processes, chemical processes, condensation, etc.), from the oil – the oil is being “dried”!
Use of our Sensors
With the help of our water in oil sensors, it is easier for operators of drying plants to see how much water is still “in” the oil to be dried. It is possible to check in real time how dry the oil is and therefore what quality it has.
Our sensors are used in a wide range of oils (including hydraulic, ester, vegetable, diesel and skydrole oil). The use of our sensors in oil drying plants offer a great potential for saving analysis, production, maintenance and energy costs compared to systems without online measurement.
At the same time it is possible to monitor the quality of the drying plants. With the help of the data output by our sensors, conclusions can be drawn about the saturation and condition of the filters used and, if necessary, replacement can be signaled.
…Refrigerator Oil

Refrigerator oil has to fulfil various tasks: For example, in addition to the lubrication of machine parts, it is also responsible for the cooling and sealing of compressors, as well as for the dissipation of the heat generated, or it contributes to the general improvement of tightness in the entire air-conditioning circuit.
Consequences of Water Ingress
These tasks can only be fulfilled satisfactorily if the oil is free from contaminants such as water. So, refrigerator oils should be as water-free as possible.
The consequences of water ingress, e.g. due to the smallest of leaks or refilling processes, can be a change in viscosity, a reduction in oil stability or even oil ageing. Refrigeration machine oils used at temperatures below freezing point are particularly at risk of contamination. A too high moisture content can lead to the formation of ice crystals and thus to less flowable oil. The oil can therefore no longer fulfil its function as a lubricant.
Use of our Sensors
Refrigerator oil with a too high moisture content must be changed because of the negative consequences. To avoid a change and unnecessary costs, the use of our water in oil sensors is the solution. By continuously measuring the water content in the refrigerator oil, an increase in water content is noticed immediately and action can be taken quickly to prevent it being too late.
The limit values for the permitted moisture content vary depending on the oil. By calibrating to the customer’s specific fluid, the sensor can react very precisely in real time and trigger an alarm via the switching output at the limit value set by the customer.
…Customer-specific Fluids

The unique selling point of our sensors is the absolute water content measurement in user-specific liquids. Our sensors can be precisely adjusted and calibrated not only for mineral oils but also for non-mineral oils.

The liquids to which our sensors have been adjusted so far can be divided into the following groups:

Mineral oils (among others):
  • HLP46
  • Diesel
  • Durixol (hardening oil)
Non mineral liquids (among others):
  • Vegetable Oils (including grape seed oil, castor oil)
  • Synthetic Oils (including Isomax, Skydrol, Refrigerants)
  • Silicone Oils (including COOLANOL)
  • Alcohols
  • Brake Fluid

In order to check whether calibration to your liquid is possible, we are pleased to carry out a customer-specific validation in our laboratory. Please get in touch with us!

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Water in oil Sensor

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