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Klein Tools CL390 AC Clamp Meter
Klein's CL390 is an auto-ranging True RMS clamp meter that measures AC/DC current up to 400A and non-contact voltage (NCVT) through the clamp. Its test leads cover AC/DC voltage up to 600V, resistance, continuity, frequency, capacitance, duty cycle, DC microamps and diode test, and an included thermocouple handles temperature. It has a reverse-contrast LCD, a CAT III 600V safety rating and 6.6 ft drop protection.
Why it caught our attention
Check current price on Amazon Jason-approved copy fix 10/16
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Find reviewed: October 16, 2026