Klein Tools CL390 AC/DC Digital Clamp Meter, Auto-Ranging, 400 Amp, NCVT Tester, Hi-Viz LCD Display, TRMS, Continuity Resistance, Temperature and More
*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.
Bottom line: The Klein Tools CL390 AC/DC Digital Clamp Meter, Auto-Ranging, 400 Amp, NCVT Tester, Hi-Viz LCD Display, TRMS, Continuity Resistance, Temperature and More is a niche pick — read recent reviews before buying in the tools & maintenance category, priced around $80.20. Read recent reviews carefully before committing.
Klein Tools CL390 is an automatically ranging true root mean squared (TRMS) digital clamp meter. It measures AC/DC current and NCVT via the clamp, AC/DC voltage, DC microamps, resistance, continuity, frequency, capacitance, and diodes via test leads, and temperature via a thermocouple probe. It features a high visibility, reverse contrast LCD display that optimizes view ability both in dark or bright ambient lighting. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the…
SpecPicks Verdict
SpecPicks classifies Klein Tools CL390 AC/DC Digital Clamp Meter, Auto-Ranging, 400 Amp… as a niche pick — read recent reviews before buying in the tools & maintenance category, based on our editorial and benchmark analysis and our ranking model that weights rating × review-volume × price-fit. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for tools & maintenance of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- VERSATILE CLAMP METER: Measures AC/DC current and NCVT via clamp; AC/DC voltage, resistance, continuity, frequency/duty cycle, DC microamps, diode test and capacitance via test-leads; temperature via thermocouple
- NON-CONTACT VOLTAGE TESTING: Integrated into the clamp jaw for convenient electrical testing
- REVERSE-CONTRAST DISPLAY: High-visibility reverse-contrast LCD ensures improved viewability in all lighting conditions
- ACCURATE MEASUREMENTS: Auto-ranging and True Root Mean Squared (TRMS) technology provides precise and accurate measurements
- CONVENIENT FEATURES: Test lead holder on the side of the clamp and optional magnetic hanger (Cat. Nos. 69445 or 69417) for hands-free operation
Full Specifications
| Brand | KLEIN TOOLS |
|---|---|
| Color | Multi |
| Model | CL390 |
| Style | Standard Display |
| Style Name | Standard Display |
| Unit Count | 1.0 Count |
| Part Number | CL390 |
| Power Source | Battery Powered |
| Item Type Name | AC/DC Digi Clamp Meter Auto-Ranging 400 Amp |
| Item Dimensions | 8.45 x 3.51 x 1.51 inches |
| Specification Met | Cat III 600v, Cat IV 600v |
| Compatible Devices | Devices with test lead inputs |
| CONVENIENT FEATURES | Test lead holder on the side of the clamp and optional magnetic hanger (Cat. Nos. 69445 or 69417) for hands-free operation |
| Included Components | AC/DC Digital Clamp Meter |
Ready to buy?
Klein Tools CL390 AC/DC Digital Clamp Meter, Auto-Ranging, 400 Amp, NCVT Tester, Hi-Viz LCD Display, TRMS, Continuity Resistance, Temperature and More is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.
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