Distribution Transformer Gauges

Distribution transformer gauges and monitoring devices including oil level gauges, temperature indicators, and pressure vacuum gauges designed to ensure safe and reliable transformer operation in utility, industrial, and commercial applications. Distribution transformer gauges are essential monitoring components that provide real-time visibility into critical operating conditions such as oil level, temperature, and internal tank pressure. These devices help operators detect issues early—such as overheating, oil loss, or abnormal pressure—before they lead to equipment failure or outages. 

Parts Super Center offers a complete range of distribution transformer gauges and indicators designed for both pad-mounted and pole-mounted transformers, supporting continuous monitoring in demanding environments. Our inventory includes oil level indicators, oil and winding temperature gauges, and pressure vacuum gauges, all engineered for durability, accuracy, and long service life. Monitoring devices play a critical role in transformer maintenance by providing early warning signals that allow operators to take corrective action before failures occur. 

Built for Utility & Industrial Monitoring, our transformer gauge solutions are designed for electric utilities and substations, steel mills and heavy industrial operations, commercial and institutional facilities, and renewable energy and grid infrastructure.

We supply a wide range of transformer gauges, including:

• Oil Level Gauges (OLI / MOG) – Monitor insulating oil levels to ensure proper cooling and insulation
• Oil Temperature Indicators (OTI) – Measure top oil temperature to detect overheating conditions
• Winding Temperature Indicators (WTI) – Simulate or measure winding hot-spot temperature for load monitoring
• Pressure Vacuum Gauges – Track internal tank pressure changes due to thermal expansion
• Multi-function gauges with alarm contacts – Trigger alerts or control cooling systems when thresholds are exceeded 

These gauges provide critical insight into transformer health, helping prevent insulation damage, oil breakdown, and catastrophic failure.
Common Part Number Patterns & OEM References. We support sourcing and cross-referencing for gauge assemblies compatible with leading OEM transformer manufacturers, including Qualitrol, ABB, GE, WIKA, and Eaton.

Typical industry part number formats include:

• Oil level gauges (MOG / OLI): 020, 032, 086 series (Qualitrol-style formats)
• Oil temperature indicators (OTI): AKM34, AKM347, 103-series
• Winding temperature indicators (WTI): 104, 114, 509-series
• Pressure vacuum gauges: PVG-0-10, PVG-30-30, compound gauge formats
• OEM-style references: 5GTT, 7TT, 9TG series (GE / ABB style formats)

Whether you’re replacing a faulty indicator or upgrading monitoring capabilities, PSC has distribution transformer gauges that deliver the visibility and reliability needed to maintain safe and efficient power distribution systems.