TLDR Review: Klein Tools Digital Clamp Meter, 400 Amp
Verdict
The Klein CL390 is a promising multimeter with excellent build quality and useful features, but it may fall short in specific applications, especially for accurate low DC amp readings and in outdoor conditions. For those in need of accurate automotive diagnostics, these limitations might be significant.
- Top pro:
- Solid construction and robust build.
- Top con:
- Non-contact voltage sensing is overly sensitive, with a loud beeper.
Pros
- •Solid construction and robust build.
- •Smooth operation with a bright and clear display.
- •Versatile features and high-quality test leads.
- •True RMS measurement capability.
Cons
- •Non-contact voltage sensing is overly sensitive, with a loud beeper.
- •Display readability issues in bright outdoor settings.
- •Inconsistent and inaccurate measurements for low DC amps, especially in automotive applications.
- •Frequent mode switching required back to DC; auto shut-off interrupts workflow.
- •Thermocouple function produces unreliable readings.
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How we researched this
About this review: it summarizes the professional reviews and customer ratings ShopSavvy collected for this product, alongside prices from 1 retailer in ShopSavvy's price data, most recently seen Oct 4, 2026.
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