DESCRIPTION:

The MPAC128 Acoustic Imager from Megger Group Limited** is a 128-channel airborne ultrasound imaging system designed for rapid, non-contact detection and localisation of acoustic emissions associated with partial discharge (PD) and pressurised gas leaks.

The instrument utilises a 128 digital MEMS microphone array operating across the ultrasonic frequency band (typically 2 kHz to 100 kHz detection range) with advanced acoustic beamforming algorithms to calculate sound source directionality and intensity. Detected ultrasonic emissions are overlaid in real time onto a high-resolution visual image, enabling intuitive fault identification without complex signal interpretation.

For electrical asset diagnostics, the MPAC128 is optimised for detection of:

• Corona discharge

• Surface tracking

• Arcing

• Insulation breakdown precursors

For industrial maintenance, it supports identification of:

• Compressed air leaks

• Vacuum leaks

• Industrial gas system leaks

The system enables safe stand-off inspection of live medium- and high-voltage assets, reducing the need for intrusive testing or shutdown. Typical applications include substations, switchgear assemblies, GIS installations, overhead line components, transformers, and rotating plant environments.