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:
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Corona discharge
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Surface tracking
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Arcing
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Insulation breakdown precursors
For industrial maintenance, it supports identification of:
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Compressed air leaks
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Vacuum leaks
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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.