Sonus PD

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.

The Compact Ultrasonic Testing Device

  • Versatile & Durable

    Easy to use unit converts ultrasound into audible signals and shows instantaneous and maximum sound level readings in decibels.

  • Minimal training required

    Minimal training is required to get a Predictive Maintenance program using Ultrasound up and running.

  • Early detection

    Detect early warning signs of problems in electrical & mechanical assets long before they become failures.

Sonus PD
  • Data Synchronization

    Sync to central server as well as syncing with other SONUS PD units on clients system.

  • Compatibility

    High quality behind-the-head style headset compatible for use with hardhats.

  • Streamline Planning

    Collect baseline and trend information on mechanical asset performance to streamline maintenance planning.


TEV Measurements
Measurement Range0 to 80 dBmV
Resolution1 dB
Accuracy±1 dB
Noise RejectionYes
Ultrasonic Measurements
Measurement Range-6dBµV to + 70dBµV
Resolution1 dB
Accuracy±1 dB
Transducer Sensitivity-65dB (0dB = 1volt/µbar RMS SPL)
Transducer Centre Frequency40 kHz
CommunicationBluetooth & Customer Server
Data AccessWeb front end
ResultsdB, PRPD, Noise
EnclosureInjection moulded plastic case
DisplayOLED display with 6 display LEDs (PD level)
ControlMembrane keypad
ConnectorsPower, Headphones and External Acoustic Sensor
Operating Environment
Operating Temp5°C to 55°C
Humidity0 to 90% RH non-condensing
IP Rating54
Unit Dimensions
Size175 x 89 x 46 cm
Internal BatteryLithium Ion, 3.75V, 2.2Ah
Operating TimeApprox. 8 hours
Battery Charger
Rated Voltage90 to 264 V AC, 5V, 2.6A
Frequency47 to 63Hz
Country AdaptersUK, EU, Australia, USA
Charge Time2 hours
Safety and EMCCE-compliant in accordance with Low Voltage Directive (2014/35/EU); EMC Directive (2014/30/EU)

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