The intrinsically safe one. 

Safe for use on fuelled aircraft, the ExLRT® is designed with MROs in mind. It’s the modern alternative to the 'yellow box' LRT and is a specified tool in several Aircraft 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 multiple OEM Aircraft Maintenance Manuals (AMM).

2.6 ExLRT Application 3 Manufacturing and maintenance testing
Can be used during manufacture as well as prescribed maintenance testing

ExLRT Rental & Leasing

We offer ExLRT rental from as little as 3 days, either directly from us or via one of our trusted leasing partners.

Submit the form below to enquire about leasing in your region.

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Want to try ExLRT for free?

We're currently seeking MROs to film a product trial video.  You'll get a free 3 day trial of ExLRT - worth over £500 - and will be featured across our website and social channels.

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  • Listed in OEM AMMs (part number XLR-9703-01)
  • Alternative to BAE LRT 906-10246-3 - both tools are approved and specified by a major US aircraft manufacturer.
  • 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 several major OEM aircraft - named as a specified tool (XLR-9703-01) in AMMs
  • 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
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

Santon Switchgear logo

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

Jakub Lukasiewicz

Space Programs Production Manager, PZL Warszawa-Okecie

PZL logo

“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

Itel Electronics logo

“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

Airbus logo

“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

Pandect logo

Download EXLRT brochures

ExLRT brochures

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