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620RK | Mid Range Intrinsically Safe Igniter Tester

The AMPTEC 620RK failsafe ohmmeter was specifically designed for ultra-safe testing on squibs, flares, bridge-wire, and other explosive devices. The 620RK meets mid-range resistance requirements, and comes standard with an (OP-232) RS232C interface, and (OP-247) optically isolated power. 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.

Please contact us to purchase.


Range 20 Ω 200 Ω 200K Ω
Nominal Current 5 mA .5 mA .5 uA
Failsafe Current 8 mA 1.5 uA 1.5 uA
Resolution 1 mΩ 10 mΩ 10 Ω
Accuracy ± .02% of reading & range ± .02% of reading & range ± .05% of reading & range
Display 4 1/2 digit LED Terminals 4-wire Kelvin
Storage Temperature Range -10° to 70° C Operating Temperature Range 0° to 50° C
Dimensions 9.75″ x 10″ x 3.25″ Weight 3 lbs.
Power 4 ea rechargeable 5AHr NICAD batteries Max. Input Voltage 250 VDC
Open Circuit 1.6 VDC Max. Internal Voltage 4.8 VDC
Update 3 readings/second Temperature Coefficient ± .002% per 1° C
Ordering Information

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

Product Description Price
620RK Includes 620RK failsafe ohmmeter, (OP-232) RS232C interface, (OP-247) optically isolated power, (OP-300) lead set, & U.S. N.I.S.T Calibration Certificate. Request a quote!
Lead/Probe Sets The 620RK ohmmeter is compatible with our 620 Series probe/lead sets and accessories. This product is also commonly purchased with a rack mount (OP-519).