See true hotspot temperature where it impacts and matters the most—inside the winding. Power View Optical Temperature Monitoring embeds FBG fiber-optic sensors directly in the coils for real-time, EMI-immune measurements with deviations as low as ±0.5 °C, Sensors are oil-ready and long-life with –40…230 °C range, 10 kV/mm dielectric strength, and ≥50-year expected lifetime. A hermetic ¼” NPT feedthrough and optional tank wall plate (up to 25 feedthroughs) make retrofit practical during service across large units. DIN-rail PWTX transmitters accept 1–6 optical inputs and speak RS-485/Modbus, while the HMI adds relays/analogs for alarms and cooling control. Everything rolls up into Substation Digital for trending, diagnostics, and fleet-level risk assessment—turning temperature data into clear, actionable decisions.