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620UK-B | Intrinsically Safe Electrical Bond Tester

The AMPTEC 620UK-B bonding milliohmmeter is an affordable, highly accurate, and intrinsically safe electrical bond tester. This meter is capable of performing bond 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, while its sibling the 620LK is used by many commercial airliners.

Please contact us to purchase.



Range, Resolution, Accuracy, and Current Levels

Range 200 mΩ 2 Ω
Nominal Current 100 mA 100 mA
Resolution .01 mΩ .1 mΩ
Accuracy ± .05% of reading & range ± .05% of reading & range


General Specifications

Terminal 5-pin Male Trident Display 4 1/2 digit LCD
Update 1 reading per 3 seconds Power 4ea AA 1.5 VDC alkaline batteries
Weight (Unit Only) 3.2 lbs. Dimensions 7.69″ x 7.56″ x 3″
Max. Internal Voltage 6 VDC Open Circuit ~5 VDC
Operating Temperature Range -20° to 50° C Max. Input Voltage 250 VDC
Temperature Coefficient ± .0025% per 1° C Warranty 365 Days
Ordering Information

Our 620UK-B bonding ohmmeter is available for purchase as a part of an NSN package.
For specific pricing information or to place an order for a 620UK-B meter, please contact us today.

Package Description Price
NSN Package Includes 620UK-B bonding ohmmeter, (630-100) padded case, (630-406S) probes, & U.S. N.I.S.T Calibration Certificate. Request a quote!
Lead/Probe Sets The 620UK-B bonding ohmmeter is compatible with our 630/640/641 Series probe/lead sets and accessories. Please note that not all of our accessories are listed online.

For more detailed ordering information, contact us or see the product data sheet.

Compatible Accessories
Part Number Description Link Price
630-100 Padded case for Bonding Ohmmeters and Ground Continuity Testers Click Here $95.00
630-406S 5′ spear Kelvin probe set Click Here $265.00
630-304 5′ banana jack calibration lead set Click Here $265.00
630 Series Leads The 620UK-B is compatible with our 630 Series probes and leads Click Here

For a complete list of all compatible accessories, contact us or see the product data sheet.