System EPSILON+ for the measurement of dielectric fluid properties (conductivity, permittivity, dissipation factor)

Unser Dielektriksensor EPSILON+


New Challenges in the field of fluid research and electric driveline development

Due to the advancing electro and hybrid mobility, lubricant and operating liquids need to meet new requirements regarding their dielectric properties. Modern synthetic or gear oils are not perfect isolators – even most of the oils used for the classic combustion engine are already characterized by a minimum level of electrical conductivity. This helps to decrease tension once overvoltages occure which are for example caused by static charging within gears.

Electric drives is now literally creating a new field of tension for oils. In the presence of high voltages and high frequencies, knowledge of the complex fluid impedance is useful in order to assess the performance of the fluid.

In addition to e-mobility, there are numerous other application areas for the EPSILON+, e.g. the examination of rolling bearing greases. The knowledge of dielectric characteristics such as the relative permittivity or the dissipation factor tan δ is also relevant for the development and operation of transformers and electro-technical large-scale applications in which oils are for example used as coolant.

With EPSILON+, flucon presents a powerful measuring system for capturing the essential dielectric parameters of fluids.


flucon's latest innovation:

The dielectricity sensor EPSILON+

EPSILON+ is a compact laboratory measuring device that is used for the precise measurement of the complex fluid impedance, based on DIN IEC 60247. The system determines the following parameters:

Unser Dielektriksensor EPSILON+



  •  electrical conductivity
  •  relative permittivity / dielectric constant   ε r
  •  dielectric dissipation factor tan δ


EPSILON+  //  Measurement

EPSILON+ is characterized by its operator convenience. Less than 10 ml fluid quantity are sufficient for the measurement set-up of the screw-in sensor. The sample is filled into the supplied stainless steel container and brought to the desired test temperature with the help of a thermostat (optionally available). A full temperature gradient can then be executed automatically by the system according to your set limit values.

EPSILON+  //  Features

  •  determination of the complex fluid impedance
  •  only small samples required (approx. 8 ml)
  •  high accuracy and repeatability
  •  wear-free stainless steel screw-in sensor
  •  integrated temperature measurement (PT100)
  •  optional accessory: thermostat for automatic temperature control of your sample
  •  evaluation electronics in compact table housing with LC Display
  •  EPSILON+ PC software for control and measurement evaluation included


E is for enhancement.

You would like enhance your knowledge about the electrical behaviour of your oils and equipment?

We offer a compact and comprehensive system for dielectric analysis of your fluids.


Tech specs

Dimensions sensor D = 38 mm, H = 115 mm
Sample quantity 8 ml
Materials Stainless steel, polyether ether ketone (PEEK), polyimide
Temperature measurement PT 100, +/- 0,1°C deviation
Temperature range -20°C to 180°C
Sample temperature control electric thermostat optionally available (controlled by EPSILON+)
Electrical conductivity - measuring range 0 nS/m to 600 μS/m
Electrical conductivity - resolution 0,02 nS/m
Relative permittivity - measuring range 1 to 10
Dielectric dissipation factor - measuring range 0 to 10.000
Dielectric dissipation factor - resolution 0,003
Measuring time approx. 15 s
Accuracy +/- 1%
Electronic unit
Power supply 110-240 VAC
Energy consumption max. 30 W
Dimensions aluminum housing (WxHxD) 235 x 150 x 370 mm
Display blue LCD, 4 x 16 digits
Data communication (PC) RS-232 (adaptable to USB), EPSILON software for WINDOWS included



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EPSILON+ might be the right system for you?

Contact us today and get further information and your non-binding quote.

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flucon EPSILON+