PDS Series

Partial Discharge Sensor Port

Partial Discharge Sensor Ports (PDS) are used in conjunction with a handheld Ultrasound measurement device, allowing the end user to take closed-panel Ultrasound decibel readings and listen to the audible signals coming from a piece of equipment. In this way, problems like Arcing, Tracking and Corona can be detected without the need for maintenance personnel to wear PPE. The PDS is a small square plate with no cover with an IP10 (NEMA1) rating and has a 3.5mm female adapter for connection to a handheld ultrasound. Note that a special adapter cable may be required depending on the brand and model of the handheld being used. Adapter cables for SONUS-XT and SONUS-PD are available from IRISS. Increase your Reliability with our technology.

Safety Without PPE

The PDS gives inspectors the ability to safely perform closed panel energized inspections, removing the need to open the gear and dress in full, heavy PPE.

Listen Through Panels

Quickly and Safely perform closed panel airborne Ultrasound inspections of electrical equipment including Switchgear, Switchboards, Panelboards, Transformers, Motor Control Centers and Process Equipment Panels.

Save Time and Money

With the installation of these ports the inspector has the ability to use a single point to listen into the cabinet instead of tracing the seam and removing any diffraction of signal that may occur.


Section Image

Embedded 40KHz Airborne Ultrasonic Transducer

Quickly and Safely perform closed panel airborne Ultrasound inspections of electrical equipment including Switchgear, Switchboards, Panelboards, Transformers, Motor Control Centers and Process Equipment Panels. Through the PDS’ embedded 40KHz Airborne Ultrasonic Ceramic Transducer with 3.5mm jack socket compatible with IRISS PD and TEV testing devices such as the Sonus XT & Sonus PD to detect early warning signs such as Arcing, Tracking, Corona and Partial Discharge.

Section Image

Unconditional Lifetime Warranty

The IRISS Unconditional lifetime warranty is unique in the IR industry as it not only applies not only to the workmanship of the window housing but also applies to the durability and stability of the optic in the proposed environment. No other manufacturer can offer this because crystal optics will fail over time, and are only able to at best offer a limited lifetime warranty for manufacturing defects

Section Image

Enhanced Reliability

The use of PDS and its compatibility with Ultrasound measurement devices contribute to enhanced equipment reliability by allowing early detection of potential issues, reducing the need for PPE, and promoting preventive maintenance, ultimately increasing overall system reliability.

Section Image

IP Rating

PDS is equipped with an IP10 (NEMA1) rating, indicating its protection against solid objects and ensuring durability in various environments. This rating signifies that it offers basic protection against ingress of small foreign objects.


General Specifications
Overall Height7.62 cm (3 in)
Overall Width7.62 cm (3 in)
IP/ NEMA Environment RatingIP10 / NEMA 1
Operating Temperature-40°C (-40°F) to 273°C (523°F)
Body MaterialPowder Coated 5052 Aluminum
Gasket MaterialUL 94 5VA TPE; -40°C (-40°F) to 273°C (523°F)
Hardware Material316 Stainless Steel
Voltage RangeAny
Automatically GroundedYes
Ultrasonic Receiver Specifications
Center Frequency40.0± 1.0KHz
Bandwidth (-6dB)2.5KHz
Capacitance at 1KHz ±20%2400 pF
Max. Driving Voltage (cont.)20 Vrms
Total Beam Angle -6dB50° typical
Receiver Housing MaterialAluminum
Inspection Capabilities and ApplicationsUltrasound; Medium/High Voltage Applications
CertificationsCertified by UL (USA) & cUL (Canada) to the following standards: 50V, 50E, 756C: Impact and Flammability, 746C & 746A-2012, 1558: Impact and Load Resistance, 508A: ANSI 508A
CertificationsCSA C22.2 No. 14-13, C22.2 No. 14-10, C22.2 No. 94-M91, C22.2 No.94.1-07, C22.2 No. 94.2-07
CertificationsIP10 / NEMA 1
CertificationsLloyds of London Type Approval
CertificationsAmerican Bureau of Shipping (ABS)
CertificationsDNV (Det Norske Veritas) P261.1E Maritime, Vessel and Offshore Applications
CertificationsIEEE C37 20.7 Type 2B, C37 20.2.a.3.6: Impact and Load
CertificationsIEC 62271-200, 60262271-200,60298 Appendix A, 60068-2-6:2007, 60068-2-3, 60068-2-78:2012
WarrantyUnconditional Lifetime Warranty

Product Resources

Recommended Products


Sonus Vue Pro Software

The Powerful Sound Analysis Software


Sonus PD-X

Handheld Switchgear Partial Discharge Detector


Sonus PD Pro

Online PD Detection of HV Assets with Data Synchronization