Socket & See EPF PRO Hazardous Voltage & Phase Finder
Dual-Function Hazardous Voltage and Live Phase Detection
The Socket & See EPF PRO Hazardous Voltage & Phase Finder is a UK-designed dual-function tester for detecting hazardous AC voltage and identifying a live phase.
Designed for professional electrical and utility applications, the Socket & See EPF PRO detects the presence of voltages above 50V AC and operates across a 50–600V AC range. It is suitable for applications including electrical cabinets, street lighting columns and wooden, concrete or metal poles carrying live overhead supplies.
When voltage above 50V AC is detected, the EPF PRO provides both a visual and audible warning. A blue “heartbeat” LED provides confirmation that the instrument electronics are operating, giving the user a quick visual status indication during use.
The EPF PRO uses direct-contact measurement with capacitive coupling for live phase identification. According to Socket & See, this provides more certain phase identification than non-contact voltage indicators or similar devices. No touch pads or other direct-contact operating controls are required for the unit to function correctly.
Order the Socket & See EPF PRO today – a compact Hazardous Voltage & Phase Finder combining 50–600V AC detection, live phase identification and clear visual and audible warning.

Socket & See EPF PRO Key Features:
- Dual-function design for hazardous voltage detection and live phase identification
- 50–600V AC operating range for a wide range of electrical applications
- Visual and audible warning when voltage above 50V AC is detected
- Blue “heartbeat” LED indicates that the electronics are operating
- Live phase detection using capacitive coupling
- Fully functional while wearing full PPE, according to the manufacturer
- CAT IV 300V measurement category
- IP54 rated construction for professional field use
- Probe tip conforms to HSE recommendations
- Compact and lightweight design at approximately 150g
- Powered by 2 × AA alkaline batteries
Why Choose the Socket & See EPF PRO?
The Socket & See EPF PRO provides both hazardous voltage detection and live phase identification within one compact instrument.
Its visual and audible warning gives a clear indication when AC voltage greater than 50V is present, while the blue heartbeat LED confirms that the instrument electronics are functioning.
For live phase identification, the EPF PRO uses direct-contact measurement through capacitive coupling rather than relying solely on non-contact voltage detection. The manufacturer states that this provides more certain identification of the live phase.
The Socket and See EPF PRO Hazardous Voltage & Phase Finder is also designed to remain functional while the operative is wearing full PPE, making it particularly suited to professional electrical, street lighting and utility applications.
▶ Socket & See EPF PRO – Features & Demonstration
Specifications:
| Features | |
| Functions | Hazardous Voltage Detection / Live Phase Identification |
| Operating Voltage Range | 50–600V AC |
| Hazardous Voltage Warning | Visual and audible above 50V AC |
| Status Indication | Blue “heartbeat” LED |
| Overvoltage Category | CAT IV 300V |
| Safety Compliance | BS EN 61010-1:2010 |
| IP Rating | IP54 |
| Operating Conditions | -18°C to +55°C @ 85% RH |
| Power Supply | 2 × AA LR6 alkaline batteries |
| Battery Replacement | Recommended every two years based on BS EN 61557 duty cycle |
| Probe Tip | Conforms to HSE recommendations |
| Dimensions | 200 × 22 × 30mm |
| Weight | 150g |
❓ Frequently Asked Questions (FAQ)
Q1: What is the Socket & See EPF PRO used for?
A. The Socket & See EPF PRO is a dual-function hazardous voltage and live phase finder designed to detect AC voltages above 50V and assist with identifying a live phase.
Q2: What voltage range does the EPF PRO operate over?
A. The EPF PRO has an operating voltage range of 50–600V AC.
Q3: How does the EPF PRO indicate hazardous voltage?
A. When voltage above 50V AC is detected, the tester provides both a visual and audible warning. A blue heartbeat LED also indicates that the instrument electronics are working.
Q4: Can the Socket & See EPF PRO be used while wearing PPE?
A. Yes. Socket & See states that the EPF PRO remains fully functional while the operative is wearing full PPE.
Q5: What is the IP rating of the EPF PRO?
A. The Socket & See EPF PRO has an IP54 rating and is designed as a compact and robust instrument for professional use.
Q6: What batteries does the EPF PRO use?
A. The EPF PRO is powered by 2 × AA LR6 alkaline batteries. The manufacturer recommends battery replacement every two years based on the BS EN 61557 duty cycle.