EA Technology UltraTEV Detector2 Partial Discharge Device
- Perfect as a first-pass partial discharge testing device
The EA Technology UltraTEV Detector2 is the latest innovation in the award-winning UltraTEV range, designed to make first-pass asset condition testing safer, faster, and more reliable. Featuring advanced dual-sensor technology, the UltraTEV Detector2 provides instant detection of both surface and internal Partial Discharge (PD) activity, helping organisations prevent costly failures and improve safety across their electrical networks.
If you manage switchgear, substations, or high-voltage assets, the EA Technology UltraTEV Detector2 is an essential diagnostic tool for everyday condition monitoring. It supports compliance with the Health and Safety Executive’s HSG230 Keeping Electrical Switchgear Safe guidance, which highlights the need to identify potential risks and faults before they develop into dangerous failures.

Why Detecting Surface Partial Discharge is Important
One of the main strengths of the EA Technology UltraTEV Detector2 is that it can find surface partial discharge (PD). Surface PD happens when small electrical sparks travel across the outside of insulation. This often occurs because of moisture, dust, or pollution building up on equipment. Over time, these sparks can damage the surface, create burn marks, and eventually lead to bigger electrical failures.
The danger with surface PD is that it usually builds up slowly and silently. People cannot hear it or see it until it becomes a serious problem. That is why tools like the UltraTEV Detector2 are so valuable. Its ultrasonic sensor listens for sounds that are too high-pitched for the human ear. This means it can detect PD activity at an early stage, long before it puts people or equipment at risk.
Finding surface partial discharge early brings several benefits:
- Keeps people safe – Surface PD can lead to fire or dangerous flashovers. Detecting it early helps prevent accidents.
- Avoids unexpected breakdowns – If equipment fails suddenly, it can cause costly downtime. Early warning gives teams time to plan repairs.
- Protects equipment – By fixing problems early, you can extend the life of switchgear and other electrical assets.
- Meets safety rules – Regular PD testing supports health and safety guidelines such as HSG230 Keeping Electrical Switchgear Safe.
Surface PD may sound like a small issue, but the results can be serious. In power networks, factories, or transport systems, even one equipment failure can cause major disruption. With the EA Technology UltraTEV Detector2, engineers get a simple, reliable way to detect PD before it becomes dangerous.
By making hidden faults easy to spot, the UltraTEV Detector2 helps build safer and more reliable electrical networks.
Key Benefits of the EA Technology UltraTEV Detector2
- Dual-Sensor Technology – Detects both surface PD (using ultrasonic sensors) and internal PD (using TEV sensors).
- Clear Visual Indicators – Traffic-light style LEDs make results simple to interpret:
- Green = No significant PD detected
- Amber = Increased monitoring required (TEV mode only)
- Red = Immediate investigation needed, risk to equipment and personnel
- Portable and User-Friendly – Lightweight, ergonomic design with one-button operation.
- Instant Results – Quickly identify faults before they escalate.
- Cost-Effective Safety – Low training requirements, high productivity, and improved protection for staff and assets.
Technical Features
- Inputs: TEV and Ultrasonic sensors
- TEV Thresholds: 20 dBmV and 29 dBmV
- Ultrasonic Sensitivity: 6 dBµV
- Power Supply: Rechargeable Lithium-Ion battery, over 10 hours of continuous use
- Dimensions: 201 x 76 x 34 mm | Weight: 0.4 kg
- Operating Temperature: 0°C – 55°C | Humidity: 0–90% RH non-condensing
- Audio Output: 3.5 mm headset socket for distinguishing PD from background noise
Applications
The EA Technology UltraTEV Detector2 is widely used in:
- Electrical utilities and distribution networks
- Industrial plants with high-voltage switchgear
- Condition monitoring and maintenance teams
- Safety inspections in substations and critical infrastructure
By identifying PD activity early, the UltraTEV Detector2 helps avoid unplanned outages, improves operational safety, and extends the life of electrical assets.
What comes with the kit?
When you purchase the EA Technology UltraTEV Detector2, you receive:
- UltraTEV Detector2 unit
- Clip-on headset (for audio PD analysis)
- Dedicated carry case
- Mains battery charger
- USB in-car charger
- Instruction manual

↑ The EA Technology UltraTEV Detector2 connected to a clip-on headset for audio PD analysis.
❓ Frequently Asked Questions (FAQ)
Q1: What is Partial Discharge (PD) and why is it important?
A. Partial Discharge is a localised electrical spark that can damage insulation over time. If not detected early, it can cause dangerous equipment failures. The UltraTEV Detector2 helps spot PD at the earliest stage.
Q2: Do I need specialist training to use the UltraTEV Detector2?
A. No. The device is designed to be simple, with one-button operation and traffic-light indicators that make results easy to understand.
Q3: How often should the UltraTEV Detector2 be calibrated?
A. EA Technology recommends regular calibration to keep the instrument accurate and reliable.
Q4: How does the UltraTEV Detector2 improve safety?
A. By detecting PD before it becomes serious, the device reduces risks to people, prevents costly breakdowns, and keeps equipment running safely.
The Takeaway
The EA Technology UltraTEV Detector2 is the most effective first-pass Partial Discharge survey instrument available. Combining advanced dual-sensor technology with ease of use, it empowers engineers, technicians, and safety teams to protect people and assets while reducing maintenance costs.