Transformer Oil Analysis

At ChemTX Ltd we are here to help. Many insurance companies require transformers / electrical plant to be regularly tested to mitigate any potential risk to assets or the running of your business. 

At ChemTX we can work with you to develop a sampling plan or strategy for the sampling of your transformers where we can provide advice on sampling and sampling frequencies based on current British and European standards.

If required, we can provide the correct sampling equipment (Bottles, syringes, taps and labels) to allow you to correctly take an oil sample from your HV plant.

The following list of analytical tests are available to determine the condition of your insulating oil/fluid or to determine condition of your LV/HV asset.

  • Dissolved Gas Analysis (DGA)
  • Water Content
  • Total Acid Number (TAN)
  • Breakdown Voltage (BDV)
  • Furanic Compounds (2-Furfural)
  • Degree of polymerisation calculations (Based on 2 FAL concentration)
  • Colour (Visual or ASTM method)
  • Appearance
  • Odour
  • Interfacial Tension (IFT)
  • Dielectric Dissipation Factor (DDF or tan delta)
  • Resistivity
  • Relative Permittivity
  • Oxidation Inhibitor content by FTIR
  • Particle Count / ISO cleanliness code
  • Sediment & Sludge
  • Viscosity
  • Density
On completion of analysis we provide you with a report of your analytical results which can utilise the various evaluation tools and methodologies available to help you better understand what your results mean in real terms.

Should you wish any further information in relation to the analysis of insulating fluids please contact us by email or by telephone on +44(0)1698 767979.

Sample Label


Sampling is the most important part of the whole process. A good sample yields results which are a true reflection on the condition of your asset. 

Speak to us about sampling or to arrange training.


Oil Analysis is carried out by Chemists and Laboratory Technicians using state of the art laboratory equipment.

Our in house methods follow current British Standards methodology.

We are an ISO9001:2015 accredited company for “Testing of Transformer Insulating Fluids from High Voltage Electrical plant”


In addition to your sample results, we aim to provide you with information from the various evaluation tools available to us, helping you to make good engineering decisions on the condition of your asset.  

Close Menu