A studio shot of the Klein Tools CL490 digital clamp meter featuring an orange clamp jaw, black body with rubberized grip, rotary dial, function buttons, and dual reverse contrast displays.
The What's Included collection showing the CL490 clamp meter, a black storage pouch with orange trim, a K-type thermocouple, red and black test leads, and two AAA batteries.
A close-up view of the meter interface highlighting the High-Visibility Dual Screens with arrows pointing to the main LCD on the front and the secondary LCD on the bottom.
A professional wearing gloves using the meter to test an electrical panel, displaying a reading of 120.9 on the bright reverse contrast display with text highlighting True RMS Measurement Technology.
A user holding the clamp meter near a wall outlet to demonstrate Non-Contact Voltage Detection, indicated by a red light glowing on the clamp jaw.
An HVAC technician using the meter with the included temperature probe to measure a metal duct, showing a reading of 64 degrees Fahrenheit on both screens.
A studio shot of the Klein Tools CL490 digital clamp meter featuring an orange clamp jaw, black body with rubberized grip, rotary dial, function buttons, and dual reverse contrast displays.
The What's Included collection showing the CL490 clamp meter, a black storage pouch with orange trim, a K-type thermocouple, red and black test leads, and two AAA batteries.
A close-up view of the meter interface highlighting the High-Visibility Dual Screens with arrows pointing to the main LCD on the front and the secondary LCD on the bottom.
A professional wearing gloves using the meter to test an electrical panel, displaying a reading of 120.9 on the bright reverse contrast display with text highlighting True RMS Measurement Technology.
A user holding the clamp meter near a wall outlet to demonstrate Non-Contact Voltage Detection, indicated by a red light glowing on the clamp jaw.
An HVAC technician using the meter with the included temperature probe to measure a metal duct, showing a reading of 64 degrees Fahrenheit on both screens.
KLEIN TOOLS

Klein Tools CL490 400A AC DC Digital Clamp Meter Dual Display True RMS Auto Ranging HVAC Multimeter with Temperature Probe and NCV Tester

In stock
SKU: CL490
$119.99

Description

Twice the Visibility for Precision HVAC and Electrical Troubleshooting

Tackle complex electrical and HVAC diagnostics with confidence using the Klein Tools CL490 Dual-Display Digital Clamp Meter. Engineered for professionals working in cramped, dimly lit environments, this auto-ranging tool features an innovative secondary display on the bottom of the unit, allowing you to read measurements easily regardless of the meter's orientation. With True RMS accuracy, the CL490 delivers precise readings for both AC and DC current up to 400A, as well as AC/DC voltage, making it a versatile powerhouse for residential, commercial, and industrial applications.

Built to withstand the rigors of the job site, the CL490 boasts a rugged design capable of surviving a 6.6-foot drop. It is packed with essential features for modern technicians, including a dedicated DC microamp function for testing flame sensors, a thermocouple for temperature measurements, and integrated Non-Contact Voltage (NCV) detection for safety. The high-visibility, reverse-contrast backlit LCD ensures data is legible in any lighting condition, while the ergonomic form factor and thumb-dial allow for easy one-handed operation.

Key Features

  • Dual-Display Design: Features a secondary screen on the bottom of the meter for easy viewing in tight, awkward spaces.
  • True RMS Technology: Ensures accurate and reliable measurements for AC/DC applications, even on non-linear loads.
  • Versatile Measurement Capabilities: Measures AC/DC current, AC/DC voltage, resistance, continuity, frequency, duty cycle, capacitance, and diodes.
  • HVAC Ready: Includes DC microamp functionality for flame sensor testing and a thermocouple for temperature readings.
  • High-Visibility Screen: Backlit reverse-contrast LCD provides clear, crisp data visibility in dark or bright environments.
  • Non-Contact Voltage (NCV): Integrated sensor in the clamp jaw provides audible and visual alerts to voltage presence.
  • Rugged Durability: Engineered to withstand drops from up to 6.6 feet (2 meters).
  • User-Friendly Ergonomics: Designed for comfortable grip and easy thumb-dial adjustments; includes a side-mounted test lead holder.
  • Hands-Free Compatible: Back mount accommodates optional magnetic hangers (sold separately) for convenient operation.

What's Included

  • (1) CL490 Digital Clamp Meter
  • (1) Set of Right-Angle Input Test Leads
  • (1) K-Type Thermocouple
  • (1) Storage Pouch
  • (2) AA Batteries
  • (1) Instruction Manual

Specifications

Amperage 400A AC/DC
Voltage 600V AC/DC
Jaw Opening 1.6 in.
Display Type 4000 Count Reverse Contrast LCD
Drop Protection 6.6 ft.
Frequency 10Hz - 60kHz
Measurement Type True RMS
Special Functions DC Microamps, NCVT, Temp
Batteries 2 x AA
Material ABS / Electronics
Pro-Tip: For HVAC technicians troubleshooting furnace issues, utilize the DC Microamp function to test the flame rectification sensor. A reading below the manufacturer's specification (typically between 2-10 µA) often indicates a dirty sensor or a failing module.