Fiber optic temperature monitoring system for switchgear

FJINNO provides the industry's most advanced fiber optic temperature sensor systems for continuous, real-time high voltage switchgear condition monitoring. Proactively detect and resolve thermal issues before they lead to costly downtime and dangerous arc flash events.

Price of temperature sensor for switchgear

Fiber optic is the best sensor for monitoring temperature in switchgear

Intrinsic Safety in High Voltage

Our optical fiber temperature sensor is crafted from non-conductive materials. It's completely immune to high voltage, EMI, and RFI, making it the only technology that can be safely placed directly on energized electrical switchgear components. This is a level of safety a resistance thermometer cannot offer.

Unmatched Precision & Stability

Leveraging advanced fluorescence sensor principles, our system measures the temperature-dependent decay time of light. This provides extreme accuracy and long-term stability without recalibration, making it the most reliable thermal monitoring tool for critical infrastructure.

Proactive, Not Reactive Monitoring

Periodic thermal imaging is a snapshot in time, missing transient overloads. Our online condition monitoring systems provide 24/7 data, allowing you to see trends, predict failures, and schedule maintenance efficiently. It's the core of a modern substation monitoring strategy.

Precision Monitoring for All Critical Switchgear Components

The Undeniable Need for Direct Monitoring

Loose connections, corrosion, and harmonic distortion create high-resistance points in switchgear, generating excess heat. If left unchecked, this leads to insulation breakdown, component failure, and potentially an arc flash. Our fiber monitoring system is the definitive safeguard.

  • Busbar and Joint Monitoring: Detect overheating in bolted joints, a notorious failure point in medium and high voltage switchgear parts.
  • Circuit Breaker Monitoring: Our breaker monitoring system tracks the temperature of tulip contacts and cable connections, ensuring reliable operation.
  • Cable Termination & Lug Monitoring: Essential for comprehensive power cable monitoring right at the most vulnerable connection point.

How to Implement the FJINNO Solution

As a leading manufacturer and factory, we provide a complete custom solution. Our engineers work with you to integrate our fiber optics sensors seamlessly into your new or existing switchgear, no matter the make or model. We are the trusted supplier for many switchgear OEMs.

Our optical fiber sensor is the perfect device that is responsive to ambient temperature conditions, providing the data needed for any modern electrical switchgear diagram or control system.

Case Study: Substation Upgrade Project

A major utility was facing unexplained outages in an aging urban substation. FJINNO was chosen to retrofit their 15kV switchgear lineup with our fiber optic sensor systems. Sensors were installed on busbar joints and circuit breaker connections for 32 cells.

Result: Within three months, the system identified two critical hotspots exceeding 120°C during peak load—faults completely invisible to annual IR scans. The proactive repairs prevented two catastrophic failures, saving an estimated $1.5M in potential damages and fines. This is the power of advanced power technology.

Our Product Ecosystem

High-Performance Fiber Optic Sensor

The core of our system. A passive, rugged sensor fiber optik designed for long-term deployment in harsh electrical environments, including for high-temperature optical fiber solutions.

Multi-Channel Monitor/Transmitter

The brain of the operation. This monitor temperatury device interprets signals from dozens of sensors and communicates with your SCADA system via Modbus, DNP3, or IEC 61850.

Custom Installation Kits

We provide everything needed for a successful installation, including custom-length cables, mounting hardware, and robust fiber optic feedthrough plates for panels.

Versatile Technology for Demanding Industries

While we specialize in switchgear, our technology is a proven solution for any application where traditional sensors fail. We are also a key distributor for these sectors.

Power & Distribution Transformers

The gold standard for direct transformer winding temperature measurement and hot spot monitoring, far superior to any winding temperature indicator.

Generators & Rotating Equipment

Essential for rotating equipment condition monitoring, including wind turbine condition monitoring and protecting stator windings in hydro generators.

Medical, Research & Semiconductor

The only safe choice for MRI monitor applications (mr temperature), R&D labs, and for precise wafer temperature measurement during semiconductor etching processes.

Your Global Manufacturing Partner

FJINNO is a vertically integrated manufacturer. We offer flexible partnership models for switchgear OEMs, system integrators, and large-scale projects.

OEM / ODM Integration

We offer full OEM / ODM services to integrate our technology directly into your products. Leverage our expertise to add value and safety to your offerings.

Private Label Solutions

Launch our proven technology under your own brand. We provide complete private label support, from hardware customization to documentation.

Wholesale & Bulk Supply

As a high-volume exporter and dealer, we provide competitive pricing for wholesale and bulk orders to our global partners.