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LumaSense’s Gallium Arsenide (GaAs)-based product line—LumaSHIELD—is the best alternative technology in the market to measure transformer temperature. It is best fit for utility companies that want to measure hot spot winding for smaller transformer of less than 20 MVA and distribution transformers that have a smaller asset management budget.


LumaSHIELD Controller

GaAs Based Temperature Measurement


Multi-Channel Monitor and Controller for Distribution Transformer Applications

LumaTEST Monitor

GaAs Based Temperature Measurement
High Reliability Handheld Signal Conditioner for Gallium Arsenide-Based Fiber Optic Temperature Sensors

Fiber Optic Temperature Sensor OTG-T

GaAs Based Temperature Measurement
Gallium Arsenide-Based Fiber Optic Temperature Sensor for Distribution Transformer.

Fiber Optic Temperature Sensor OTG-T+

GaAs Based Temperature Measurement
Gallium Arsenide-Based Fiber Optic Temperature Sensor with All-Dielectric Connector for Easy Installation in Transformer Hot Spot Winding.

LumaSHIELD Accessories

GaAs Based Temperature Measurement

Accessories to complement our winding hot spot temperature monitoring.



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For detailed information about Fluoroptic Thermometry (FOT) product line, please click here >>