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Specialist Materials for Industry and Science

Transformer Oil Testing

Transformer Oil Testing

There are many benefits to using Midel fluids, such as 100% fire safety, environmental friendliness and low maintenance. All our transformer oils are tested thoroughly to ensure they are capable of meeting these demands.

Testing MIDEL 7131 and MIDEL eN

MIDEL 7131 and MIDEL eN have achieved many industry standards to help cement our reputation as a market leader. For example, both have been tested in independent laboratories for corrosive sulphur to ASTM D1275 B and IEC 62535 requirements, and were found to be non-corrosive.

Each of our ester-based oils also conforms to the Restriction of Hazardous Substances Directive, with neither containing the flame retardants PBB or PBDE, nor the metals cadmium, lead, mercury and hexavalent chromium.

Dissolved Gas Analysis

Another advantage of using Midel transformer oils is that they can be tested during operation in order to spot any possible faults before they become serious.

One of the ways this is done is through Dissolved Gas Analysis (DGA), where the identification of key gases and rate of gas production can be used to determine the nature and severity of any problems with your transformer.

Using this form of transformer oil testing allows plenty of time to correct the problem and make any necessary repairs, potentially saving you a lot of time and money. This gives MIDEL 7131 and MIDEL eN a clear advantage over alternatives such as dry-type transformers.

Contact Midel

To find out more about how Midel uses transformer oil testing and how it could benefit your business, contact us by phone, post or email and we will answer any questions you may have.



  • Apiezon
  • Metrosil
  • Midel
  • Wolfmet

Products of M&I Materials Ltd.