February , 2026

Learn how Polarization Index (PI) and Dielectric Absorption Ratio (DAR) testing go beyond basic insulation resistance measurements. This article explains what the ratios reveal, acceptable PI values, and when advanced insulation diagnostics are necessary for reliable asset management.

Fusion splicing in the field rarely happens in perfect conditions. This guide focuses on practical tips to prevent rework and reduce splice loss when working in windy, cold, dusty, or humid environments, while offering troubleshooting steps for drift, contamination, and condensation issues.

Thickness gauges and flaw detectors both use sound waves to interrogate material, yet they’re designed to answer different inspection questions. Choosing the right one depends less on the technology and more on the result that’s needed.

Power quality analyzers aren’t all measured the same. This guide explains Class A vs Class B in practical terms, highlights what IEC 61000-4-30 Class A requires, and outlines the situations where Class A measurements are typically expected.