The Sonus PD-X

Handheld Switchgear Partial Discharge Detector


Overview Image


The SONUS PD-X 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-X will help you prevent unexpected outages.

Compatible With All IRISS PDS and VPDS Ports

Perform ultrasound electrical inspections with more accuracy than scanning a seam of a cabinet by having direct access into the cabinet interior. PDS and VPDS ports allow the Sonus PD-X to safely scan from the outside of the cabinet and not lose any of the signal due to diffraction.

Sonus PD App

The SONUS PD App unlocks additional functions with the SONUS PD-X Instrument. Once the unit and App have been paired, the SONUS PD-X will display a Bluetooth Symbol and all readings and monitoring functionality will transfer to the SONUS PD App on your smartphone. With the SONUS PD App, all data collected can also be transferred to a customer specific secure cloud database for further analysis and histogram trending.

Built-in Speaker

The built-in speaker allows the user to use SONUS PD-X without the headphone in quieter areas of the plant, making for a more comfortable day of testing.


Part Number Sonus PD-X
General Specifications
Overall Dimensions 175 x 89 x 46mm (6.89 x 3.50 x 1.81in)
Weight 300g (0.66lb)
IP/ NEMA Environment Rating IP54 / NEMA 1
Body Material Injection molded plastic case
Display OLED display with 6 display LEDs (PD level)
Connectors and interfaces Power, Headphones and External Acoustic Sensor
Control Membrane keypad
Operating Temperature 5°C (41°F) to 55°C (131°F)
Humidity 0 to 90% RH non-condensing
TEV Specifications
Sensor Capacitive
Measurement Range 0 to 80 dBmV
Resolution and Accuracy 1 dB, +/- 1 dB
Noise Rejection Yes
Ultrasonic Specifications
Measurement Range -6dBµV to + 70dBµV
Resolution and Accuracy 1 dB, +/- 1 dB
Transducer Sensitivity -65dB (0dB = 1volt/µbar RMS SPL)
Transducer Center Frequency 40 kHz
Internal Battery Lithium Ion, 3.75V, 2.2Ah
Operating Time Approx. 8 hours
Battery Charger
Rated Voltage 90 to 264 V AC, 5V, 2.6A
Frequency 47 to 63Hz
Country Adapters UK, EU, Australia, USA
Charge Time 2 hours
Phone and Web Application
Communication Bluetooth & Customer Server
Data Access Web front end
Capability Android
Reporting Yes
Results dB, PRPD, Noise
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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