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720A Micro-Ohmmeter | 7 Range Digital Micro-Ohmmeter

The AMPTEC 720A Micro-Ohmmeter is an affordable 7 range, 4-Wire Kelvin based product that is used to test electrical resistance on a wide variety of applications including winding resistance, contact resistance, and component testing. The 720A micro-ohmmeter has an autorange feature (available with NSN package) and is compatible with an RS232C interface (OP-232). Thanks to the Amptec 720A’s wide-range capabilities, reliability, and ease of use this micro-ohmmeter is used commonly across the globe. It is available in both battery powered or AC powered versions.

This item is not available for purchase through our website. Please contact us for more information.

Range 200 mΩ 2 Ω 20 Ω 200 Ω 2K Ω 20K Ω 200K Ω
Nominal Current 100 mA 100 mA 10 mA 1 mA 100 uA 10 uA 1 uA
Resolution 10 uΩ 100 uΩ 1 mΩ 10 mΩ 100 mΩ 1 Ω 10 Ω
Accuracy ± .02% of reading & ± .05% of range ± .02% of reading & ± .03% of range ± .02% of reading & ± .03% of range ± .02% of reading & ± .03% of range ± .02% of reading & ± .03% of range ± .02% of reading & ± .03% of range ± .02% of reading & ± .03% of range
Display 4 1/2 digit LED Terminal 4-wire Kelvin
Overload Flashes Update 3/sec.
Temperature Coefficient ± .002% per 1° C Operating Temperature Range 0° to 50° C
Dimensions 9″ x 10″ x 3″ Weight 4 lbs.
Power 90-240 VAC 50-60 Hz Max Input Voltage 264 VDC
Open Circuit ~15 VDC Max Test Current 100 mA
Ordering Information

Our 720A micro-ohmmeter is available for purchase in two separate packages, as listed below.
For specific pricing information or to place an order for a 720A meter, please contact us today.

Package Description Price
NSN Package Includes 720A micro-ohmmeter, (OP-232) RS232C interface, autorange feature, (OP-110) lead pouch, (OP-300) leads, (OP-403) probes, & U.S. N.I.S.T Calibration Certificate. Request a quote!
Commercial Package Includes 720A micro-ohmmeter, (OP-110) lead pouch, (OP-300) leads,(OP-403) probes, & U.S. N.I.S.T Calibration Certificate. Request a quote!
Lead/Probe Sets The 720A micro-ohmmeter is compatible with most 620 Series and all 720A Series probe/lead sets and accessories. Please note that not all of our accessories are listed online.
Please note that due to a significant backlog, any orders for instrumentation which need to be shipped from our facility by the end of 2021 must be placed by October 8, 2021. We apologize for any inconvenience this may cause.