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620A-4R | Ruggedized Digital Failsafe Ohmmeter

The AMPTEC 620A-4R Igniter Tester was designed to be a ruggedized version of its predecessor, the 620A-4 meter. The 620A-4R contains the same inner circuitry as the ultra-safe 620A-4, with the added bonus of protection in harsh environments, an internal Faraday cage for noise immunity, and a wide-viewing angled display. This product is widely used by both military programs and commercial clients who require a weather-proof failsafe igniter tester.

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Range 20 Ω 200 Ω 2K Ω 20K Ω
Nominal Current 5 mA 500 uA 50 uA 5 uA
Failsafe Current 8 mA 1.5 mA 150 uA 15 uA
Resolution 1 mΩ 10 mΩ 100 mΩ 1 Ω
Accuracy ± .02% of reading & range ± .02% of reading & range ± .02% of reading & range ± .02% of reading & range
Display 4 1/2 digit LED Terminals Banana jack binding posts
Storage Temperature Range -10° to 70° C Operating Temperature Range 0° to 50° C
Dimensions 13.37″ x 11.62″ x 6″ Weight 9.5 lbs.
Power 4 ea rechargeable 5AHr NICAD batteries Max. Input Voltage 250 VDC
Open Circuit 1.6 VDC Max. Internal Voltage 15 VDC
Update 3 readings/second Temperature Coefficient ± 0.1 x accuracy per 1° C
Ordering Information

This product is unavailable for online purchase. For specific pricing information or to place an order for a 620A-4R ruggedized failsafe ohmmeter, please contact us today.

Product Description Price
620A-4R Includes 620A-4R ruggedized failsafe ohmmeter, (OP-300) lead set, (620-DC) battery charger, & U.S. N.I.S.T Calibration Certificate. Request a quote!
Lead/Probe Sets The 620A-4R ohmmeter is compatible with our 620 Series probe/lead sets and accessories.