The Sonus PD Pro

On-line PD Detection of HV Assets with Data Synchronization


Overview Image


The SONUS PD is specifically designed for Partial Discharge (PD) and Airborne Emission (AE) detection on Medium and High Voltage Switchgear. The unit detects Transient Earth Voltage (TEV) signals generated by internal partial discharge as well as ultrasound acoustic discharge generated by surface tracking, arcing or corona. PD detection can be utilized to detect early warning signs of equipment insulation failure. Inspections can be performed quickly and safely by maintenance personnel with minimal training. Fast and accurate diagnosis of problems using the SONUS PD will help you prevent unexpected outages.

Hear More Clearly

System detects PD in higher noise environments, reducing the possibility false positives

Rapidly Survey Whole Substation

Detects MV and HV problems before developing into tangible failure risks

Sync Your Data

Sync data locally to your PC with the included software, or sync remotely to the cloud for access across devices


Part Number Sonus PD Pro
General Specifications
Overall Dimensions 190 x 90 x 55 mm (7.48 x 3.54 x 2.17in)
Weight 210 g (0.66lb)
IP/ NEMA Environment Rating IP54 / NEMA 1
Body Material Injection molded plastic case
Display OLED with level LEDs
Connectors and Interfaces Power, Headphones and optional sensors
Control Membrane keypad
Operating Temperature 0°C (32°F) to 60°C (140°F)
Humidity 0 to 95% RH non-condensing
TEV Specifications
Measurement Range 0 to 80 dBmV
Measurement Bandwidth 3 to 200MHz (with FM Bandstop)
Resolution and Accuracy 1 dB, +/- 1 dB
Noise Rejection Yes, with PRPD
Ultrasonic Specifications
Measurement Range -6dBµV to + 68dBµV
Resolution and Accuracy 1 dB, +/- 1 dB
Transducer Sensitivity -65dB (0dB = 1volt/µbar RMS SPL)
Transducer Center Frequency 40 kHz
HFCT Specifications
Measurement Range 0dB-75dB
Measurement Bandwidth 100kHz to 70MHz
Resolution and Accuracy 5 pC, +/- 5 pC
UHF Specifications
Measurement Range 0 to 50,000pC
Resolution and Accuracy 1 dB, +/- 1 dB
Bandwidth 200MHz – 2.0GHz
Internal Battery 1Lithium Ion, 3.75V, 2.2Ah, 8.25Wh
Operating Time 5 Hours
Battery Charger
Rated Voltage 100 to 250 VAC, 5V, 3A
Frequency 47 to 63Hz
Country Adapters UK, EU, Australia, USA
Charge Time 3 Hours
Safety and EMC CE-compliant in accordance with Low Voltage Directive (2014/35/EU) EMC Directive (2014/30/EU)
Warranty 12 Month Limited Warranty
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