Amptec Research Failsafe Squib Tester 620A-4 Failsafe Ohmmeter and Test Lead Set Storage Case
620A-4 | Digital Failsafe Ohmmeter
September 3, 2015
Amptec Research Front View 620BH Failsafe Ohmmeter
620BH | Intrinsically Safe Igniter Tester
September 4, 2015
Show all

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.

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

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.
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.