ASTM D3612 (Method C)
Dissolved gas analysis
Look for signs of thermal or electrical faults in transformer oil.
DieleX Lab / Science & Service
A better decision in every drop.
We analyze insulating oils to help you understand the condition of electrical equipment and plan what comes next.
DieleX Lab
Science in the service of electrical reliability.
Insulating oil carries clues about what is happening inside a transformer. The right analysis can help reveal developing faults, track ageing and plan the right action.
From sample to decision
What one drop can reveal.
One sample. Several perspectives. Useful information about your equipment.
Sample carefully
Good information starts in the field. Use our procedure or ask our team for sampling support.
Measure methodically
Tests matched to the equipment produce results you can compare and use.
Interpret and act
Results are placed in context in a report that helps prioritize the next intervention.
What we measure
Tests that give each sample meaning.
A selection of dielectric fluid analyses covered by our ANAB scope. See the complete document for every accredited test.
Inside an oil-filled transformer
Explore what the oil can tell us about the different parts of your equipment.
The fluid that carries the clues.
Oil helps insulate and cool the transformer. Its electrical strength, water content and ageing indicators provide complementary information.
Stress can leave a trace.
Thermal or electrical stress can cause oil and insulating materials to generate gases. Dissolved gas analysis helps identify these signatures in the sample.
A view into solid insulation.
Ageing cellulose insulation can release furanic compounds into the oil. Their analysis provides another perspective on the insulating system.
Every result is considered alongside the equipment’s history and operating conditions.
ASTM D1816
Dielectric breakdown
Assess the oil’s ability to withstand electrical stress.
ASTM D1533
Water content
Measure moisture that can reduce the oil’s insulating properties.
ASTM D971
Interfacial tension
Track changes at the oil–water interface as the oil ages.
ASTM D974
Acidity
Observe signs of chemical degradation in the oil.
ASTM D924
Power factor
Measure dielectric losses in insulating oil.
ASTM D4059
PCB content
Document PCB presence for equipment management.
ASTM D5837
Furanic compounds
Look for compounds associated with ageing paper insulation.
Measurement tools
Precision takes shape in the lab.
From electrical tests to chromatography, each technique reveals another facet of insulating oil.
DGA
Dissolved gas analysis
Gas chromatography separates dissolved gases to help identify fault patterns.
Electrical test
Dielectric breakdown
A controlled test measures how the oil performs between two electrodes.
Surface measurement
Interfacial tension
A tensiometer studies the oil–water interface, a useful indicator of oil ageing.
Specialized analysis
Furanic compounds
Liquid chromatography measures compounds associated with ageing paper insulation.
Illustrative demonstrations, without measurement values. Images represent instrument types; models used in the laboratory may differ.
ANAB accreditation
A verifiable scope. Rigorous analysis.
DieleX Lab is accredited by ANAB to ISO/IEC 17025:2017 for the chemical tests on dielectric fluids listed in its scope. Certificate AT-2521 is valid through January 16, 2028.
CertificateAT-2521
ScopeVersion 009 · Jan 8, 2026
Valid throughJan 16, 2028
Take it with you
Resources close at hand.
Review our accreditation scope, prepare a sample, and learn more about the laboratory.
One connected team
Laboratory insight meets field experience.
DieleX Lab works with Les Services Électrotechniques (SET). Together, oil analysis and electrical equipment expertise help guide maintenance decisions.
Let’s talk about your equipment
Have a question about testing or sampling?
Tell us about your equipment and what you need to understand. Our team can help identify the next step.
Call the laboratoryLaboratory634-A, chemin des Vieux-Moulins
Saint-Jean-sur-Richelieu, Québec J2Y 1C5Get directions
Emailinfo@dielexlab.com
Phone450 741-7007