The device for continuous measurement of electrical conductivity in oil, e.g. kerosene

On their way from the refinery to the tank farm to the airport, light mineral oils such as kerosene flow through pipelines. Rolling and hydraulic oils circulate through pumps and filters to the storage tank. As the conductivity of these oils is low, there is a high risk of electrostatic charging.

By using the MLA1000 for the stationary measurement of electrical conductivity, airports, pipeline operators or refueling companies can improve the safety of fuel transports and reduce the use of additives. Light mineral oils can thus be monitored in-line, directly and continuously.

The conductivity meter is also used as standard with silicone oils and solvents in technical and industrial processes.

In our animation you can learn more about the measuring process.

How the MLA1000 prevents electrostatic charging can also be read in a 

technical article by Industrial Technology Magazine



  • Controll

    The measurement system allows a complete record of the electrical conductivity of incoming and outgoing oil.

  • Measuring accuracy

    With continuous feedback of the electrical conductivity the additive can be injected economically.

  • Flow rate

    The MLA1000 conductivity meter uses the flow rate within a pipeline

  • Safety

    If the electrical conductivity falls below the critical value, the measuring system will give an immediate warning.


The Technical Rule for Hazardous Substances TRGS 727 describes the “safe handling of liquids and the avoidance of ignition hazards due to electrostatic charging”. This technical guideline recommends to check and document the conductivity in case hazards due to electrostatic charging.

The MLA1000 can measure the average conductivity from 50 to 15.000 picosiemens/meter (pS/m), thus ensuring a high level of safety when conveying and handling hazardous liquids. The measured temperature and conductivity values are additionally output as 4...20mA signals. A sliding socket for adjusting the immersion depth and for changing the probe under process conditions is optionally available. Jet A-1 type kerosene is used globally as turbine fuel in commercial aviation, while Jet B kerosene is used for military jets. These fuels are therefore relevant for international airlines as well as for industrial customers such as turbine manufacturers.

Application examples:

  • Kerosenes
  • Hydraulic oils
  • Silicone oils
  • Solvents
  • Rolling oils

You can find the certificates of conformity in our download area.

Technical Data

  • Conductivity: up to 15000 pS/m; simultaneous temperature measurements -20°C to 60°C
  • Limit, function and status message
  • Outgoing signal: 4..20mA for electrical conductivity and for temperature
  • Display MLA1000-A: II 2(1)G Ex de [ia Ga] IIB T4 Gb
  • Probe MLA1000-S: II 1G Ex ia IIB T4 Ga
  • Easy checking of the function and display accuracy
  • Display unit can be mounted separately


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