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601ES | Weather Resistant Safety Digital Multimeter

The AMPTEC 601ES Digital Multimeter is used to measure stray voltage and current in harsh weather environments. Additionally, all internal circuits are conformal coated, it contains an internal all-metal Faraday cage, and has a built-in self-test to ensure ultimate integrity of measurement. The 601ES DMM is approved by the NASA/WFF Safety Office for compliance with the WFF Range Safety Manual (RSM) and USAF’s Space Wing (AFSPC), proving its intelligent design is ultra-safe.

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



Range 2 Ω 20 Ω 200 Ω 2 KΩ 20 KΩ
Nominal Current 5 mA 5 mA 0.5 mA 50 uA 5 uA
Failsafe Current 8 mA 8 mA 1.5 mA 150 uA 15 uA
Resolution 100 uΩ 1 mΩ 10 mΩ 100 mΩ 1 Ω
Accuracy 2 V to 200 V AC/DC: ± 0.5% of range 600 V AC/DC: ± 1% of reading range 2 A AC/DC: ± 0.5% of reading range 2 Ω to 20 Ω: ± .05% of (reading + range)
Display 4 1/2 digit LED Terminals 4-wire Kelvin
Storage Temperature Range -20 °C to 70 °C Operating Temperature Range 0 °C ± 50 °C
Dimensions 9.5″ x 11″ x 5″ Weight 8 lbs.
Power 4 ea AA batteries Max. Input Voltage 650 VDC
Open Circuit 1.6 VDC Max. Failsafe Current 8 mA
Overload Display flashes “>>>OR” Update 300 ms.
Ordering Information

This product is unavailable for online purchase. For specific pricing information or to place an order for a 601ES digital multimeter, please contact us today.

Product Description Price
601ES Includes 601ES digital multimeter, (OP-304AC) lead set, (620-DC) battery charger, & U.S. N.I.S.T Calibration Certificate. Request a quote!
Lead/Probe Sets The 601ES digital multimeter 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.