Megger MST220 Audible Socket Tester

The Megger MST220 Audible Socket Tester is a reliable plug-in tester designed to quickly identify wiring faults in UK BS1363 13A three-pin sockets. Using a combination of bright tri-colour LEDs and clear audible alerts, it provides a fast and simple way to detect common socket wiring issues before carrying out full electrical testing.

Capable of identifying up to 17 different wiring fault combinations, including missing conductors, reversed polarity and incorrect connections, the MST220 helps electricians save valuable time during installation, maintenance and inspection work. Correct wiring is confirmed by three green LEDs and a continuous tone, while wiring faults are indicated by a combination of coloured LEDs and a distinctive warbling sound for easy diagnosis.

Key Features

• Quickly identifies wiring faults in UK BS1363 13A socket outlets.
• Tri-colour LED indicators provide instant visual fault identification.
• Audible confirmation of correct wiring and fault conditions.
• Detects up to 17 wiring fault combinations.
• Simple plug-in operation with no setup required.
• Robust and reliable construction for professional use.

Ideal Applications

The Megger MST220 is ideal for electricians carrying out:

• Socket outlet installation and replacement.
• Electrical rewiring projects.
• Pre-inspection checks before BS 7671 testing and certification.
• Commissioning of appliances connected to 13A socket outlets.
• Routine maintenance and fault finding.

Note: The MST220 does not detect neutral-to-earth reversal.

Technical Specifications

• Indicators: Tri-colour LEDs with audible sounder.
• Supply Voltage: 230V AC, 50/60Hz, single phase.
• Maximum Current Draw: <15mA.
• Operating Temperature: 0°C to 40°C.
• Humidity: <95% RH (non-condensing).
• Safety Standard: EN61010.
• Dimensions: 67mm (D) × 78mm (H) × 58.5mm (W).
• Weight: 74g.