Efficiency is measured by:

Pre- and Post-Purification Testing: Comparing oil parameters such as dielectric strength, moisture content, acidity, and particle count before and after purification.
Dielectric Breakdown Voltage: Higher values post-purification indicate improved insulating properties.
Moisture Content Reduction: Measured in ppm (parts per million), indicating effective dehydration.
Particle Count Analysis: Using ISO cleanliness codes to quantify particulate contamination levels.
Dissolved Gas Analysis (DGA): Reduction in gas concentrations shows effective degassing.
Process Parameters Monitoring: Evaluating system performance metrics like flow rate, temperature, and vacuum level during operation.
Consistent achievement of target values demonstrates efficient purification.