DGAIQ

Every gas reading, in plain words.

You don't need to be a chemist. DGAIQ tells you what each result points to, and what to do about it.

C₂H₂57ppm

Acetylene at this level points to arcing inside the transformer.

Act now

C₂H₄190ppm

Ethylene this high means oil overheating above 700 °C. Find the hot spot.

Investigate

CO₂/CO9ratio

The paper insulation is ageing normally. Keep routine monitoring.

Normal

From lab report to decision, in minutes.

Upload the report

PDF, Word, Excel or a photo of the lab sheet. The gas values are filled in for you.

Algorithms and AI analyse

Nine recognised methods read the gases together, and AI explains the result.

A clear diagnosis

Condition, likely cause, recommendations and a PDF report you can share.

Reports are read in the browser and are not stored on our servers.

Every sample point. Read correctly.

Oil from the main tank, the tap-changer, the conservator or the Buchholz relay tells a different story. DGAIQ reads each one with the right rules.

Bushings

HV and LV connections. Overheated bushing joints show up as thermal gases in the main tank.

Conservator

Expansion tank. Its oil reads lower for gases (diluted, may vent through the breather), so DGAIQ asks for a main-tank sample to confirm.

Buchholz relay

Collects free gas from a fast fault. DGAIQ converts relay gas to dissolved values (Ostwald, IEC 60599) and tells air ingress from a real fault.

Tap-changer (OLTC)

Arcs every time it switches. DGAIQ judges OLTC samples on trend and heating gases, not main-tank limits.

Main tank

The standard DGA sample (bottom valve). Full IEEE C57.104 / IEC 60599 limits, Duval Triangle and Pentagon, Rogers and ratios apply.

Cooling

Radiators and fans. Poor cooling or overload raises low-temperature thermal gases (T1) and CO.

Questions.

Which reports can it read?

Lab PDFs, Word files, Excel/CSV sheets and photos of the results sheet. If a value can't be read, you type it in.

Is my report kept private?

The file is read in your browser and not stored. Only the readings are sent to our AI provider (Anthropic) to write the recommendations; they are deleted within 30 days and not used for training.

Does it replace an engineer?

No. It gathers the evidence and suggests next steps; a qualified engineer reviews and signs the report.

✦

Summary

Written instantly from the readings and analysis on this page

Get a plain-language executive summary of this transformer: the verdict, the key findings and what to do next. You can include it in the PDF report.

Include in the PDF report

Ask DGAIQ

Instant answers from this transformer’s data. Nothing leaves your browser.

Gas levels against IEEE C57.104-2019

Bring the report

Upload the laboratory report, then check every extracted value against the original.

Add the lab report or drop a file herePDF, Word, Excel/CSV or photo · up to 15 MB

No report yet. Upload a lab report, or type the readings in the table below.

Text read from the file (for checking)

Transformer and sample

Transformer name Serial / ID Highest voltage (kV) Rating (MVA) Oil preservation Client Sample taken from Insulating liquid Standard for gas limits Manufacturer / year Cooling Oil temperature at sampling (°C) Lab report no. Service age (years) Current sample date Previous sample date

Check the readings and see the verdict

Values in ppm (µL/L). Enter “<1” for results below the detection limit.

Dissolved gases

Gas	Current	Previous	Change	Rate /day	IEEE 2019

Oil quality and paper ageing

Test	Result	Unit	IEC 60422

Fault diagnosis by method

Method	Result	Meaning

Diagnostics

The evidence behind each conclusion.

Duval Triangle 1

Duval Pentagon

Rogers ratios

Gases against IEEE C57.104-2019 limits

| 90th percentile┃ 95th percentile

Gas ratios

Ratio	Value	Reading

Cellulose and ageing

Sample history and trends

Recommendations and report

Choose what goes in the report, add your own comments, then download.

Recommendations

Engineer’s comments (printed in the report) Reviewed by

Export

The report below updates as you edit. Download it as a PDF to send to the client.

Diagnose the transformer from its gases.