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AMPTEC 620UK-B Intrinsically Safe Aircraft Bonding Tester

AMPTEC 620UK-B Intrinsically Safe Aircraft Bonding Tester Ohmmeter

The AMPTEC 620UK-B Intrinsically Safe Bonding Ohmmeter is an affordable, highly accurate, and safe electrical bond tester. This meter is capable of performing Bonding Measurements on a variety of components and metal-to-metal connections. The 620UK-B has been independently UL-913 certified, ensuring quality and safety at each step of manufacturing. Due to its safety certifications and high level of accuracy, the 620UK-B Bonding Tester is the choice bond tester for countless USAF maintenance wings as well as US Navy maintenances centers, while its sibling the 620LK is used by many commercial airlines.


Originally designed at the request of Lockheed Martin’s engineering team, the AMPTEC 620UK-B Bonding Milli-Ohmmeter has become the standard in its industry, being used in maintenance wings across the globe. The 620UK-B meter provides extremely safe and reliable resistance testing on explosive  devices. AMPTEC’s various Safety Board approvals (found in section F on page 18) demonstrate AMPTEC’s dedication to manufacturing quality products that are safe to use in a variety of volatile atmospheres and environments.

AMPTEC 620UK-B Bonding Milli-Ohmmeter is UL-913 approved as an intrinsically safe apparatus for use in Class 1, Division 1, Groups A, B, C, and D locations for ambient temperatures from -20° C to 50° C (T3 zones). Additionally, the AMPTEC 620UK-B meter is also MIL. STD. 810 MTD. 511 approved for use in explosive, volatile fuel-laden atmospheres.

Devices and testing processes that the 620UK-B meter can be utilized for include, but are not limited to Electrical chassis ground connections and continuity determination(s) on electrical subsystems used in general purpose aircraft, helicopters, fighter jets, UAVs, drones, missiles, continuity determinations on fuses, electrical cable connections, heavy duty metal-to-metal connections, chassis bonding measurements for metal-to-metal ground connections, etc.

620UK-B Abbreviated Specifications

Range200 mΩ2 Ω
Nominal Current100 mA100 mA
Resolution.01 mΩ.1 mΩ
Accuracy± .05% of reading± .05% of reading


 The  620UK-B Bonding Ohmmeter is available for purchase as a part of an NSN package. For specific discount pricing information or to place an order for a 620UK-Bonding Tester, please contact ATEquip today.  

AMPTEC RESEARCH is an ISO 9001:2015 Certified Accredited Quality Management System Company

ATEquip is a SAM.GOV Cage Code 5PF05 registered company with the New Entity ID: H5H4KAHBASC7

Package Description Price


NSN Pkg.

Includes 620UK-B Bonding Ohmmeter, (630-100) padded case, (630-406S) probes, & NIST traceable Calibration Certificate

On-line purchasing is unavailable for For the 620UK-B Bonding Tester. For specific discount pricing information and availability or to place an order for a 620UK-B Igniter Tester, please contact ATEquip for discount pricing today.+