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AC/DC Digital Clamp Meter, TRMS Auto-Ranging 400 Amp - Klein Tools

Part #: CL390

The Klein Tools CL390 is a professional-grade AC/DC digital clamp meter engineered for accuracy and versatility in demanding automotive and industrial environments. This auto-ranging True Root Mean Squared (TRMS) meter provides precise measurements for technicians working with complex electrical systems, offering comprehensive diagnostic capabilities in a durable, user-friendly design.

Key Features

  • True RMS Measurement: Ensures accurate readings for both linear and non-linear loads, crucial for modern electrical and electronic systems.
  • Integrated Non-Contact Voltage Tester (NCVT): Built directly into the clamp jaw, allowing for quick detection of AC voltage without direct contact, enhancing safety and efficiency.
  • High-Visibility Display: Features a reverse contrast LCD display, providing improved readability in various ambient lighting conditions, from bright sunlight to dimly lit work areas.
  • Comprehensive Measurement Functions: Measures AC/DC current via the clamp, and AC/DC voltage, resistance, frequency, DC microamps, capacitance, duty cycle, diode test, and continuity via test leads. It also includes temperature measurement with a thermocouple.
  • Hands-Free Operation: Equipped with a test lead holder on the side of the clamp and compatible with optional magnetic hangers (Cat. Nos. 69445 or 69417) for secure, hands-free mounting during operation.

Applications

This robust clamp meter is an essential tool for professional technicians and mechanics. It is ideal for diagnosing electrical issues in automotive systems, including checking battery drain, alternator output, and parasitic draws, making it a valuable asset for vehicle compatibility diagnostics. In industrial settings, the CL390 excels at troubleshooting motors, power supplies, and control panels, ensuring reliable performance for electrical system maintenance and installation. Its durable construction and professional-grade features are built to withstand the rigors of daily use in workshops and field service applications.

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List: $144.99 Save: $40.25

$104.74

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  • Model: 434683
  • Shipping Weight: 1.25lbs
  • UPC: 092644692871
  • Manufacturers Part #: CL390
  • Manufactured by: Klein Tools
  • Also Known As: KLECL390

This product was added to our catalog on Monday 25 May, 2026.

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