Blog

Online DGA accuracy starts with oil-gas separation. Compare headspace, vacuum, membrane and vacuum-assisted membrane degassing plus oil-circuit safety requirements.

L-PAS physics for engineers: how a narrow-linewidth laser turns light into heat and sound for zero-background, sub-ppm dissolved gas analysis in transformer oil.

2026 survey of DGA sensor technologies – GC, electrochemical, NDIR/FTIR, TDLAS, Raman, PAS, L-PAS, QEPAS – with acetylene detection-limit ladder and trade-offs.

DGA trend analysis: absolute ppm/day vs relative %/month gas generation rate, IEEE C57.104 Condition 1-4 intervals, and why continuous data beats lab sampling.

Key gas, Doernenburg, Rogers, IEC ratio, Duval triangle vs pentagon and ML fusion — their research-comparison accuracy and a practical multi-method workflow.

IEC 60599:2022 classifies transformer faults into six types: PD, D1, D2, T1, T2, T3. This guide explains each fault type, its energy band and signature gases.

Practical field guide to the seven DGA fault gases plus oxygen and nitrogen — what each gas indicates, and why a single-gas spike is never a diagnosis.

Hydrogen is the earliest fault signal in transformer oil. New 2026 UHV compliance rules, anti-drift sensor technology and the Heathrow substation case show why continuous online hydrogen monitoring now matters more than ever.

New 50-page technical white paper on laser photoacoustic spectroscopy (L-PAS) for online DGA of transformer oil — technology fundamentals, detection limits, system architecture, diagnostics, and economics. Free instant download.

Dissolved gas analysis is not an academic exercise. Behind every gas concentration measurement and Duval Triangle plot, there is a transformer — often worth millions […]