Qualitrol Moisture Guide for Transformer Monitoring

Moisture is one of the most destructive forces inside power transformers, yet most utilities are monitoring it incorrectly. Traditional parts-per-million (PPM) measurements can't tell you when dangerous free water formation is about to occur—leaving your critical assets vulnerable to catastrophic failure.

The Measurement That Changes Everything

Discover why leading utilities are shifting to Relative Saturation (RS) monitoring—a measurement approach that reveals the true saturation level of water in transformer oil, regardless of temperature, oil age, or chemical composition. Unlike PPM values that fluctuate with temperature, RS provides a clear, actionable indicator of when your oil is approaching the critical 100% saturation point where free water forms.

What You'll Learn:

The Science Behind the Sensor – Understand how capacitive thin film polymer technology continuously measures water activity in oil with 2% accuracy, providing real-time visibility into moisture levels that laboratory sampling simply cannot match.

Temperature's Critical Role – See why a sudden temperature drop can push your transformer from safe operation to free water formation in hours—and why online monitoring is the only way to catch it in time.

RS vs. PPM: The Crucial Difference – Learn why 85% RS at one temperature means something completely different than 85% RS at another, and how this knowledge prevents emergencies before they develop.

Practical Interpretation Guidelines – Navigate the technical specifications with clear explanations of measurement ranges, accuracy calculations, and conversion algorithms that translate sensor data into actionable maintenance decisions.

Real-Time Risk Assessment – Explore how continuous monitoring enables proactive intervention, allowing you to plan maintenance activities before moisture reaches dangerous levels that compromise insulation integrity and accelerate aging.

Download this essential whitepaper to master moisture monitoring and protect your transformer fleet from water-related failures.