Extech EX540 12 Function Wireless True RMS Industrial MultiMeter/Datalogger with NIST
Fluke 28 II Ex Intrinsically Safe True RMS Digital Multimeter | Fluke
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Auto-Ranging Digital Multimeter with 4000 Counts and Backlit LCD Display, Measures AC/DC Voltage and Current, Resistance, Capacitance, Frequency, Duty Cycle, Diode, Continuity by EX ELECTRONIX EXPRESS: Amazon.com: Tools & Home Improvement