Smart Sensor Solutions for Substations and Transformers | Paolo Guizzetti, Electronsystem

Not all sensor innovation comes from a garage in Silicon Valley — sometimes it comes from a factory in Italy that has been doing one thing since 1999.

At the 2026 IEEE PES T&D Show, Alan Ross of APC Media walks the floor with Electronsystem, an Italian manufacturer specializing in high-voltage electronic transmitters for electrical substations. In this product-focused overview, the Electronsystem team demonstrates their full sensor portfolio: density sensors with Modbus connectivity, moisture sensors that calculate dew point temperature, pressure sensors for low-variance environments, and a newborn oil sensor designed specifically for transformer applications.

Key takeaways from the product showcase:

• Electronsystem has been manufacturing high-voltage sensors in Italy since 1999, with a dedicated factory focused exclusively on this technology
• Their density sensors transmit pressure, temperature, equivalent pressure, and density via Modbus protocol for real-time substation monitoring
• Moisture sensors calculate dew point temperature, the critical threshold at which humidity condenses inside gas-insulated equipment
• A newborn device, purpose-built for transformer oil, measures ppm of water content alongside temperature and other critical parameters
• All sensor data is collected by gas analyzers or oil analyzers, available in configurations ranging from economical units to touchscreen models
• The full product line has been deployed across numerous installations, with an emphasis on friendly, accessible data presentation for operators