The market-leading decision-support tool for managing and interpreting transformer insulating liquid data. Make informed maintenance decisions with confidence.
TOA manages and interprets your insulating liquid test data — dissolved gas analysis, fluid quality, moisture, furan analysis, and more. Using our proprietary Reliability-based DGA methodology, TOA moves beyond conventional limits-based interpretation to give you a direct, actionable indication of risk for every transformer in your fleet.
Full DGA support including 1–9 gas interpretation, Reliability-based DGA, 4-Simplex fault type diagnosis, and rate-of-change analysis.
Comprehensive insulating liquid testing including moisture assessment, furan analysis, fluid quality parameters, and trace element analysis.
Compare transformers across your fleet, prioritise for repair-or-replace decisions, and track condition trends over time.
Conventional DGA raises too many false alarms and misses real problems. R-DGA associates fault gas production with transformer failure data, giving you two actionable outputs: Cumulative Severity (CSEV) — your transformer's risk relative to the fleet — and Hazard Factor (HF) — the probability of failure over the next year.
Learn more about the science“TOA4 ties directly into our CMMS Cascade which allows TOA4’s condition assessment to trigger Cascade in the event of any anomalies and alert the appropriate parties to take action.”
TOA with Monitor Watch brings your monitor data directly into TOA’s analytics engine. Clean noisy online data, eliminate false alarms, and manage your entire fleet — regardless of monitor brand — on a single screen.
Explore Monitor WatchSean Casey is representing Delta-X Research at the IEEE Rural Electric Power Conference, connecting with rural and municipal utility engineers on how Reliability-based DGA helps smaller utility operations manage transformer health analytics, identify early fault indicators, and prioritise fleet maintenance with limited internal resources.
Delta-X Research co-hosts the TransformerMonitoring.com Hospitality Suite at the 2026 International Conference of Doble Clients, alongside DNV, Kinectrics, and Systems With Intelligence. Three evenings of informal conversation for transformer professionals, March 30–April 1 at the Deco Room, Level 3.
Thomas Anderson is representing Delta-X Research at the Northwest Public Power Association's Engineering & Operations Conference and Trade Show in Portland, Oregon — Booth #105. Meet the team to discuss how TOA and Monitor Watch help Pacific Northwest utilities optimise transformer maintenance and replacement decisions.
