Klein Tools 400A AC/DC TRMS Digital Clamp Meter

The Klein Tools CL390 400A AC/DC TRMS Digital Clamp Meter is a compact, high-performance multimeter designed for accurate measurement of AC/DC current, voltage, resistance, temperature, capacitance, and more. Engineered for professional electricians and HVAC technicians, it offers True RMS technology and advanced features in a rugged, easy-to-use format.

Key Features:

• 400A AC/DC Current Measurement: Precisely measures alternating and direct current through the clamp, ideal for troubleshooting and installations.
• True RMS Accuracy: Ensures accurate readings on non-linear loads commonly found in modern electrical systems.
• Backlit LCD Display: High-visibility screen with dual-line readout and backlight for clear viewing in low-light environments.
• Non-Contact Voltage Detection (NCV): Quickly identify live wires without making direct contact-great for safe first-level diagnostics.
• Thermocouple Input for Temperature Readings: Includes a Type K thermocouple for measuring temperature, essential for HVAC and motor diagnostics.
• Test Lead Storage & Easy Access Battery Compartment: Integrated back panel holds leads neatly, while the battery compartment is accessible without removing the housing.
• Auto Ranging + Manual Mode: Automatically selects the best range or allows for manual override for experienced users.

Measurement Functions:

• AC/DC Current: Up to 400A (via clamp)
• AC/DC Voltage: Up to 600V
• Resistance: Up to 60MΩ
• Capacitance: Up to 4000μF
• Frequency: 10Hz to 500kHz
• Duty Cycle: 1% to 99%
• Temperature: -40°C to 1000°C (via thermocouple)
• Continuity & Diode Test: Audible indicator for continuity and diode verification

Specifications:

• Model: CL390
• Display Count: 6000
• Jaw Opening: 1.18" (30mm) - accommodates conductors up to 750 MCM
• Safety Rating: CAT III 600V
• Battery: 2 × AAA (included)
• Backlight: Yes
• Dimensions: 8.35" x 2.60" x 1.44" (212mm x 66mm x 36.5mm)
• Weight: 0.54 lbs (245g)

Included Accessories:

• Test Leads
• Type K Thermocouple
• Carrying Pouch
• 2 × AAA Batteries
• User Manual

Applications:

• Electrical Maintenance & Troubleshooting: Ideal for electricians working on panels, circuits, and motors.
• HVAC Diagnostics: Accurately measures temperature, voltage, and current in air conditioning systems.
• General Facility Maintenance: Versatile enough for residential, commercial, and industrial applications.
• Safety & Compliance Testing: Non-contact voltage and continuity testing for quick safety checks.

The Klein Tools CL390 400A TRMS Clamp Meter is a feature-rich, reliable tool designed for professionals who need accurate readings and practical functionality in the field. Whether you're working in electrical maintenance or HVAC service, it's a compact powerhouse that delivers on performance and safety.

Delivery

This item is sold and shipped by an Everyday Market Partner. Delivery costs and estimated delivery timeframes are shown on the product page.

Returns

Returns or refunds for Everyday Market items can't be processed in-store. These items are sold and shipped by our Everyday Market Partners, so all returns must be arranged online via Feedback & Enquiry form.

Change of Mind Returns

You can request a change of mind return within 30 days of purchase if your item is in new condition. Items must be unused, undamaged, and returned in their original packaging, including all tags for clothing, footwear and accessories. Some items aren’t eligible for a change of mind return, including bulky items, personal or hygiene-sensitive products, perishables, custom or personalised items, e-gift cards, prepaid SIMs, and dangerous goods. If your change of mind return is approved, a return fee may apply and will be deducted from your final refund. For full details and exclusions, please see our Change of Mind Returns Policy.

Faulty or Damaged Returns

If your item is faulty or arrives damaged, please contact the Everyday Market Partner as soon as possible via Feedback & Enquiry form. Providing clear details and photos will help the Everyday Market Partner assess the issue and work with you to resolve it quickly. Your rights under the Australian Consumer Law still apply.