The smart one. 

BLRT is a fully automatic bond, loop and joint resistance tester with built-in operator instructions.


It speeds up the testing process by diagnosing faults quickly, and automatically uploads results to production systems once all checks have passed. Recommended for testing bonds, loops and joints during the manufacture of aircraft and aircraft subassemblies. 

Main BLRT Applications

Several wind turbines are positioned across mutiple fields. The sky is very dark and stormy, and a lightning bolt is visible.

Measuring resistance on aircraft & large structures such as wind turbines or infrastructure at risk from lightning strike.

Aircraft technician testing the bond resistance between structural elements

Bond resistance between structural elements

A BLRT tool sits on the ground of a maintenance gangway during bond testing of an aircraft.

Loop resistance and integrity of cable shields and bonding straps

joint resistance

Joint resistance diagnostics

Two aircraft sit in a maintenace hangar
Testing during manufacture and as part of preventative maintenance checks
  • 200Hz frequency
  • Uses 4-wire (Kelvin) resistance measurement to ensure micro-ohm accuracy
  • Bond test resistance range from 0.1mΩ to 2Ω
  • Loop test resistance range from 0.5mΩ to 4000mΩ
  • Joint test resistance range from 0.05mΩ to 4000mΩ
  • On-screen operator instructions
  • Lightweight so only requires a single operator
  • Paperless process logs and uploads test results, guaranteeing traceability and avoid human error
  • Pass/fail status indication on couplers and bond probes
  • Dimensions 345mm length x 295mm width x 150mm depth
  • Weight 7kg / 15.5lbs (BLRT unit only)
  • Integrated LCD 10.4” touchscreen monitor
  • Smart Li-Ion “hot-swap” batteries
  • Soft-start current source prevents arcing
  • Auto and manual modes
  • Active couplers and bond probes – no need to touch screen
  • Test management software automates the test process
  • Powered by MKAT test management software, rated ‘easy to use’ by 90% of our customers.

Some of our BLRT customers

The Boeing Company logo
Eaton logo
heart aerospace logo
Honeywell logo
KAE logo
Safran logo
Spirit Aerosystems logo


“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

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

Jakub Lukasiewicz

Space Programs Production Manager, PZL Warszawa-Okecie

“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

“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

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

An ExLRT user from Lufthansa Technik

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

Peter Hicks

Chief Electronics Engineer, Pandect Precision Components

“We're using BLRT to check the electrical bonding on test rig ground planes. The joint test functionality allows us to find high impedance interfaces quickly, which wouldn't be possible with a normal bond tester."

Andy Palmer

Senior Environmental, HIRF, & Lightning Qualification Engineer, Heart Aerospace

heart aerospace logo

Download BLRT brochures

Resources 4.3 Brochure thumbnail 11 BLRT

Product enquiry form

Enquiry Form
Enter the Captcha

Request product specs

Resources 4.3 Brochure thumbnail 11 BLRT

Submitting this form will pass your details onto one of our team who will be in touch to send you the technical product data sheet(s) you've requested.


MK Test uses the information you provide us to contact you about relevant content, products and services. You may unsubscribe from these communications at any time. The information will not be used for any third-party marketing. For information on how to unsubscribe, as well as our privacy policy and commitment to protecting your privacy, read our Privacy Policy.