Microphone array camera MPAC128

acousticfor hazardous areasdetection

About the product
Megger’s MPAC128 acoustic imager visualises gas leaks and partial discharge (PD) to support preventive inspection and rapid fault localisation. The MPAC128 family captures ultrasonic and audible signals using a 128-microphone array for non-contact detection up to 120 metres (typical best performance 10–20 m). The MPAC128-ATEX variant is certified for ATEX Zone 2 use.

Key capabilities
The MPAC128 series is engineered for PD and gas-leak detection with enhanced localisation accuracy thanks to a high microphone count and broad detection bandwidth. Typical applications include overhead line and industrial-plant inspections and surveys of equipment in potentially hazardous areas when using the ATEX model.

Highlights

• 128 microphones for improved spatial and frequency resolution
• Detection frequency range: 2 kHz to 48 kHz
• Specified non-contact detection range: 0.5 m to 120 m (optimal performance typically at 10–20 m)
• MPAC128: IP54 ingress protection; MPAC128-ATEX: certified II 3G Ex ic IIC T5 Gc for Zone 2
• Operating temperature range: -20 °C to +50 °C

Release / firmware notes
Firmware updates are published for MPAC128 and MPAC128-ATEX. Recent releases include improved PRPD recognition, optimised translations and UI alignment fixes.

Software
MPAC Analyst software (MPAC Analyst) is available to manage and analyse acoustic images and video captured by MPAC devices. Features include viewing, analysis, editing and report generation. Referenced software version: 1.2.0.

Product documents (listed on the page)

• MPAC128-MPAC128ATEX_DS_EN.pdf (Data sheet)
• MPAC128_UG_en.pdf (User guide)
• MPAC208-Software_UG.pdf (Software user guide)

FAQ highlights

• Imaging principle: faults (gas leaks, PD) emit sound/ultrasound; the imager maps and localises the source.
• Identification distance: specified ~0.5 m to 120 m depending on conditions; typically best at 10–20 m.
• Battery: typical capacity decay ≈20% after ~1000 full cycles; internal battery replaceable by authorised service.
• Calibration: recommended every two years (manufacturer calibration available); field verification with MPAC-V may extend intervals.
• Recommended starting frequency ranges: general 20–40 kHz; distant/quiet points 15–35 kHz; noisy environments 28–48 kHz.

Technical specifications

• Commercial designation: MPAC128 (MPAC128-ATEX for Zone 2)
• Manufacturer / brand: Megger
• Application: non-contact detection and localisation of partial discharge and gas leaks
• Microphone array: 128 microphones
• Detection frequency: 2 kHz to 48 kHz
• Detection range: 0.5 m to 120 m (typical best performance 10–20 m)
• ATEX (MPAC128-ATEX): II 3G Ex ic IIC T5 Gc
• Ingress protection: IP54 (MPAC128)
• Operating temperature: -20 °C to +50 °C
• Battery: internal rechargeable; typical decay ~20% after 1000 cycles; replacement by authorised service
• Calibration: recommended every 2 years
• Firmware referenced: 6.0.4.3
• MPAC Analyst software: version referenced 1.2.0
• Limitations: cannot detect underground gas leaks (ultrasound absorbed by ground); liquids and very low-pressure SF6 leaks may not produce detectable sound