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 PD phenomenon. 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. Utilizing the Sonus PD-X with a Sonus UHF-P sensor or the Sonus HFCT-P sensor will allow the inspector to detect PD in broader range of applications and equipment. The Sonus PD-X is compatible with all IRISS CAP Series PD and PDS Inspection windows and VPDS Inspection ports. Allowing the Sonus PD-X to safely scan a singular repeatable test point from the outside of the cabinet and not lose any of the signal due to diffraction.

Advanced Noise Rejection

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

Increase Your Accuracy

Perform ultrasound electrical inspections with more accuracy than scanning a seam of a cabinet by having direct access into the cabinet interior.

Quickly & Easily Identify Faults

The Sonus PD-X has 4 operational ranges with a live Level Screen, and two scatter plots screens displaying a PRPD Live and a PRPD Persist view which instantly show the technician the presence of a fault condition.


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
Measurement Range 0 to 80dBmV
Measurement Bandwidth 3 to 200MHz (with FM Bandstop)
Resolution 1dB (Accuracy ±1dB)
Noise Rejection Yes, with PRPD
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
HFCT Specifications
Measurement Range 0 to 50,000pC
Measurement Bandwidth 100kHz to 70MHz
Resolution 5pC (Accuracy ±5pC)
UHF Specifications
Measurement Range 0dB-75dB
Resolution 1dB (Accuracy ±1dB)
Bandwidth 200MHz – 2.0GHz
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
Safety and EMC CE-compliant in accordance with Low Voltage Directive (2014/35/EU) EMC Directive (2014/30/EU)
Warranty 12 Month Limited Warranty
Sonus PD-X Kit Contains
Sonus PD-X Detector
Function Tester
Mains Charger
USB Charger
Hard wearing PELI™ case
Optional Accessories
Sonus HFCT-P Sensor
Sonus UHF-P Sensor
View Full Specification

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