The Flir Si2a-PD keeps a constant listen on your most critical electrical asset, detecting, locating, and assessing partial discharge, corona, and arcing early, from up to 200 m (656 ft) away, so you can keep teams out of hazardous areas and prevent faults from turning into outages, incidents, or costly downtime. AI-enhanced detection and analysis turns complex signals into clear, actionable insight with minimal intervention, while its IP66-rated, VESA-mountable design makes permanent installation simple in harsh environments and easy to integrate into your wider data systems—so your switchgear, substations, and GIS stay safer, stronger, and continuously operational.
FLIR Si2a-PD Fixed-Mount Acoustic Imaging Camera for Partial Discharge Detection
Continuous 24/7 acoustic monitoring for partial discharge, corona and arcing in medium- and high-voltage environments.
CRITICAL ELECTRICAL ASSETS
Built for the assets that keep operations running.
The FLIR Si2a-PD supports continuous monitoring across grid infrastructure, transformers, GIS, switchgear, substations and cable connection points, helping teams detect partial discharge activity before faults become failures.
Grid Assets
Transformers
GIS
Switchgear
Substations
Cable Joints
WHY IT MATTERS
Smarter monitoring. Safer decisions.
Continuous acoustic monitoring helps maintenance teams detect risk earlier, work from a safer distance and respond with confidence before electrical faults escalate.
Always-On Electrical Guardian
Provides continuous 24/7 monitoring to detect partial discharge, corona, arcing and other electrical anomalies early.
See the threat from up to 200 meters
Detects, locates and assesses PD faults from up to 200 m / 656 ft, supporting safer diagnostics from a distance.
AI turns noise into answers
AI-enhanced analysis turns acoustic signals into clear, actionable insight with minimal operator input.
KEY CAPABILITIES
Engineered for continuous acoustic monitoring.
The FLIR Si2a-PD is designed for fixed, always-on partial discharge detection in demanding electrical environments. With long-range acoustic detection, rugged IP66 protection, flexible connectivity and AI-assisted severity assessment, it helps teams monitor critical assets continuously and respond before problems become costly outages.
124 MEMS microphones
Low-noise acoustic array with real-time sound visualisation
Up to 200 m detection
Long-range partial discharge detection for safer diagnostics
IP66 rated
Designed for substations and demanding industrial sites
75°
Field Of View
Wide acoustic and visual monitoring coverage.
PoE / Wi-Fi
options
Flexible installation and connectivity options
AI severity assessment
Automatic assessment with recommended actions
MONITORING ADVANTAGES
Designed to detect, alert and integrate.
From configurable monitoring zones to FLIR Assetlink integration, the Si2a-PD gives teams the tools to monitor electrical assets continuously, receive alerts when thresholds are exceeded and act on clear severity-based insights.
Continuous 24/7 partial discharge monitoring
Detects PD, corona and arcing from up to 200 m / 656 ft
AI-enhanced severity assessment with recommended actions
Configurable monitoring zones and alarms
IP66-rated fixed installation for harsh outdoor environments
Integrates with FLIR Assetlink and enterprise systems
TECHNICAL SPECIFICATIONS
Built for fixed installation in demanding environments.
Review the key acoustic, optical and measurement specifications for the FLIR Si2a-PD, including microphone array performance, detection range, field of view, severity assessment and supported partial discharge classifications.
| Highlighted | |
| Acoustic Measurement | 124 low-noise MEMS microphones, real-time sound visualization |
| Severity Assessment | Automatic AI-based severity assessment including recommended actions |
| Distance | From 0.3 m (1.0 ft) up to 200 m (656 ft) |
| Imaging & Optical | |
| Digital Camera | 12 MP Color |
| Field of view (FOV) | 75° diagonal |
| Video Frame Rate | Streaming: 15 fps; |
| Video Image Resolution | 960 × 540 streaming; |
| Measurement & Analysis | |
| Able to Quantify | Surface or Internal Discharge, Positive and Negative Corona, Negative Corona, Floating Discharge |
| Acoustic Measurement | 124 low-noise MEMS microphones, real-time sound visualization |
| Bandwidth | 2 kHz to 130 kHz |
| Detection Threshold | 20 kHz: -19.5 dB; |
| Distance | From 0.3 m (1.0 ft) up to 200 m (656 ft) |
| Severity Assessment | Automatic AI-based severity assessment including recommended actions |
DETECT PARTIAL DISCHARGE BEFORE IT BECOMES DOWNTIME
Partial discharge, corona and arcing can be intermittent and difficult to capture during scheduled inspections. The FLIR Si2a-PD provides continuous acoustic monitoring so developing electrical faults can be detected, assessed and prioritised earlier.
By keeping a constant watch on critical electrical assets, the Si2a-PD helps maintenance teams reduce risk, improve safety and prevent small warning signs from becoming outages, incidents or costly equipment failures.
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