The intrinsically safe one. 

Safe for use on fuelled aircraft, the ExLRT® is designed with MROs in mind. It’s also specified in The Boeing Company maintenance manuals (part number XLR-9703-01).

The ultimate tool to carry out prescribed loop resistance testing on aircraft during maintenance, the ExLRT is certified by all global standards as safe for use in high-risk flammable zones.  It’s small and light enough to be used by a single operator, and automatically records all test data, eliminating the need for paper records.

Main EXLRT Applications

2.6 ExLRT Application 1 loop resistance testing on aircraft

Loop resistance testing on aircraft

2.6 ExLRT Application 2 Alternative to LRT

Alternative to the LRT tool 906-10246-3. Both models are listed in The Boeing Company maintenance manuals (AMM).

2.6 ExLRT Application 3 Manufacturing and maintenance testing
Can be used during manufacture as well as prescribed maintenance testing
  • Boeing part number XLR-9703-01
  • Alternative to BAE LRT 906-10246-3 - both tools are approved and specified by Boeing.
  • 200Hz frequency
  • Ex ia IiA T3 Ga (60079-11) Certified
  • Loop test resistance range from 0.5mΩ to 4000mΩ
  • Joint test resistance range from 0.05mΩ to 4000mΩ
  • Dimensions 150mm length x 200mm width x 300mm depth (6 x 8 x 11.8 inches)
  • Weight 3kg (6.6lbs)
  • Large backlit LCD screen
  • Text instructions to guide operator through the test when in automatic mode
  • Record Mode enables recording of measurements for upload to a PC - info sheet download available here
  • View, edit and delete measurements using record mode
  • Self calibration saves up to 2 months on turnaround time
  • Wearable options including belt clip
  • Powered by MKAT test management software, rated ‘easy to use’ by 90% of our customers.
  • Battery designed to last for a full 8hr shift without requiring a recharge
  • Battery can be charged without removal or after being removed from device
  • Approved for use on Boeing Aircraft - named as a specified tool (XLR-9703-01) in the AMM
  • Lightweight and portable – 80% lighter than LRT 906-10246-3
  • Certified to all global standards as safe for use in fueled aircraft
  • Single operator use
  • Backlit screen for easy reading in any conditions
  • Controls on the probes to speed up testing
  • Removable batteries means no tool down-time
  • Automatic pass/fail status indication and reporting
  • Proven ROI within 12 months
  • 77% reduction in time spent on data collection, management and error correction compared to an LRT.


Some of our EXLRT customers

2.6 ExLRT Customer logo 1 AAR
2.6 ExLRT Customer logo 2 Aircraft Tool Hire
The Boeing Company logo
2.6 ExLRT Customer logo 4 Crestview Aerospace
Delta TechOps logo
Lufthansa Technik logo
Magnetic MRO logo
2.6 ExLRT Customer logo 8 SCAT Airlines
2.6 ExLRT Customer logo 9 ST Aerospace


“We really value the flexibility of the system and the quality of the results; the F2500 delivers exactly what we asked for.”

Zander van der Steege

Project Test Engineer, Santon Switchgear

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“The MK Test solution…improves performance and streamlines manufacturing.”

Jakub Lukasiewicz

Space Programs Production Manager, PZL Warszawa-Okecie

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“MK are the industry standard for automated test equipment. Using their equipment has greatly improved our efficiency and accuracy when testing.”

Sam Baker

Sales Manager, Itel Electronics

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“RTS is an innovative solution compared to traditional wiring testers. It allows workload reduction by fast set-up and fast testing.”

Olivier Boizot

Project Leader, Airbus

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“Faster testing, easier to use, and [testing] can be performed by one person.”

An ExLRT user from Lufthansa Technik

Lufthansa Technik logo

“The MK tester is very reliable – the repeatability is what makes it valuable.”

Peter Hicks

Chief Electronics Engineer, Pandect Precision Components

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Download EXLRT brochures

ExLRT brochures

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