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620MG | Digital Failsafe Ohmmeter with Diode Test Capability

The AMPTEC 620MG failsafe ohmmeter was specifically designed for ultra-safe testing on squibs, flares, bridge-wire, and other explosive devices. The 620MG meets a wide-range of resistance requirements, and comes standard with an (OP-232) RS232C interface, (OP-247) optically isolated power, an autorange feature, and a diode test capability. This product was derived from the USAF Non-Nuclear Munitions Safety Board approved AMPTEC 620A-4 meter – thus creating a product line that is the industry standard in igniter testing.

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



Range 2 Ω 20 Ω 200 Ω 2000 Ω 20K Ω 200K Ω 2M Ω
Nominal Current 5 mA 5 mA 500 uA 50 uA 5 uA .5 uA 0.5 uA
Failsafe Current 8 mA 8 mA 8 mA 8 mA 8 mA 8 mA 8 mA
Resolution 0.1 mΩ 1 mΩ 10 mΩ .1 Ω 1 Ω 10 Ω 100 Ω
Accuracy ± .02% of reading & range ± .02% of reading & range ± .02% of reading & range ± .02% of reading & range ± .02% of reading & range ± .02% of reading & ± .05% of range ± 1% of reading & ± .2% of range
Display 4 1/2 digit LED Terminals 4-wire Kelvin
Temperature Coefficient ± .002% per 1° C Update 3/sec.
Storage Temperature Range -10° to 70° C Operating Temperature Range 0° to 50° C
Dimensions 9″ x 9″ x 3″ Weight 4 lbs.
Power Optically isolated continuous power Max. Input Voltage 250 VDC
Open Circuit 1.6 VDC Max. Failsafe Current 8 mA
Ordering Information

This product is unavailable for online purchase. For specific pricing information or to place an order for a 620MG failsafe ohmmeter, please contact us today.

Product Description Price
620MG Includes 620MG failsafe ohmmeter, (OP-232) RS232C interface, (OP-247) optically isolated power, diode test capability, (OP-300) lead set, & U.S. N.I.S.T Calibration Certificate. Request a quote!
Lead/Probe Sets The 620MG ohmmeter is compatible with our 620 Series probe/lead sets and accessories.
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.