Front view of the Klein Tools ET270 Digital Multimeter and GFCI Receptacle Tester showing the large backlit LCD display, selection dial, and function buttons. The image includes the specialized receptacle test cord and a pair of professional-grade right-angle test leads with removable safety caps.
Product feature infographic for the Klein Tools ET270 multimeter highlighting its 600V AC/DC voltage range, 40M Ohm resistance, and CAT III 600V safety rating. Key bullet points emphasize its ability to identify common wiring faults, inspect GFCI devices with trip time data, and find corresponding circuit breakers.
Split-screen application photo demonstrating the dual functionality of the ET270. The left side shows the multimeter measuring $282.5V$ AC in an electrical panel using test leads, while the right side shows the receptacle cord testing a 120V outlet with a "Correct" wiring indication on the display.
Action shots demonstrating diagnostic capabilities: the top image shows the ET270 detecting an open ground/neutral wiring fault in a standard outlet, and the bottom image shows a technician using the GFCI button to test an outlet's trip time, displayed as 0.10 seconds.
Instructional graphic for the FIND mode feature. The top panel shows the ET270 plugged into an outlet in Find Mode, while the bottom panel shows an electrician at the breaker box where an audible tone stops once the correct corresponding circuit breaker is flipped.
Perspective view of the Klein Tools ET270 with its integrated kickstand deployed for hands-free viewing. The specialized GFCI receptacle test cord is plugged into the bottom input jacks, illustrating the secure connection for outlet diagnostics.
Rear view of the ET270 multimeter showcasing the built-in test lead storage clips and the mounting point for an optional magnetic hanger. This design keeps the red and black probes organized and accessible during transport and storage.
Full front shot of the ET270 tester with the North American 120V receptacle test cord attached. The screen displays a full segment check, highlighting the various diagnostic icons for hot, ground, and neutral wiring conditions.
A complete product kit layout for the Klein Tools ET270, featuring the digital multimeter, two AAA batteries, a pair of right-angle test leads with a safety cap, the GFCI receptacle test cord, and a durable black carrying pouch with orange trim.
A professional electrician wearing a hard hat and insulated safety gloves uses the ET270 multimeter to test a high-voltage electrical disconnect. The meter display shows a reading of 479V AC, demonstrating its reliability for industrial electrical troubleshooting.
A technician using the Klein Tools ET270 digital multimeter to test a standard 120V AC outlet. The display shows a voltage reading of 120V while simultaneously identifying an open ground wiring fault, demonstrated by the clear "Open Grd" indicator and a red alert light.
An electrician in a hard hat and protective high-voltage gloves uses the ET270 multimeter to probe a residential circuit breaker panel. The meter is placed at the base of the panel box and displays a steady reading of $275.0V$, illustrating its use in multi-phase electrical environments.
Close-up of the Klein Tools ET270 performing a GFCI trip test on a kitchen or bathroom style receptacle. The user is pressing the dedicated GFCI button, and the high-contrast display shows a trip time of 0.10 seconds, confirming the safety device is operating within specifications.
Professional application shot of the ET270 multimeter being used by a tradesman to troubleshoot a row of circuit breakers. The technician is wearing safety gear while using the red and black test leads to verify voltage across individual breakers in a complex electrical panel.
Close-up detail of the ET270 multimeter display showing $282.5V$ AC while testing industrial-grade circuit wiring. The image highlights the auto-ranging feature and the secure connection of the right-angle test leads into the common and voltage input jacks.
Digital Multi-Tester DMM with Receptacle Tester (ET270) promotional how to video
Front view of the Klein Tools ET270 Digital Multimeter and GFCI Receptacle Tester showing the large backlit LCD display, selection dial, and function buttons. The image includes the specialized receptacle test cord and a pair of professional-grade right-angle test leads with removable safety caps.
Product feature infographic for the Klein Tools ET270 multimeter highlighting its 600V AC/DC voltage range, 40M Ohm resistance, and CAT III 600V safety rating. Key bullet points emphasize its ability to identify common wiring faults, inspect GFCI devices with trip time data, and find corresponding circuit breakers.
Split-screen application photo demonstrating the dual functionality of the ET270. The left side shows the multimeter measuring $282.5V$ AC in an electrical panel using test leads, while the right side shows the receptacle cord testing a 120V outlet with a "Correct" wiring indication on the display.
Action shots demonstrating diagnostic capabilities: the top image shows the ET270 detecting an open ground/neutral wiring fault in a standard outlet, and the bottom image shows a technician using the GFCI button to test an outlet's trip time, displayed as 0.10 seconds.
Instructional graphic for the FIND mode feature. The top panel shows the ET270 plugged into an outlet in Find Mode, while the bottom panel shows an electrician at the breaker box where an audible tone stops once the correct corresponding circuit breaker is flipped.
Perspective view of the Klein Tools ET270 with its integrated kickstand deployed for hands-free viewing. The specialized GFCI receptacle test cord is plugged into the bottom input jacks, illustrating the secure connection for outlet diagnostics.
Rear view of the ET270 multimeter showcasing the built-in test lead storage clips and the mounting point for an optional magnetic hanger. This design keeps the red and black probes organized and accessible during transport and storage.
Full front shot of the ET270 tester with the North American 120V receptacle test cord attached. The screen displays a full segment check, highlighting the various diagnostic icons for hot, ground, and neutral wiring conditions.
A complete product kit layout for the Klein Tools ET270, featuring the digital multimeter, two AAA batteries, a pair of right-angle test leads with a safety cap, the GFCI receptacle test cord, and a durable black carrying pouch with orange trim.
A professional electrician wearing a hard hat and insulated safety gloves uses the ET270 multimeter to test a high-voltage electrical disconnect. The meter display shows a reading of 479V AC, demonstrating its reliability for industrial electrical troubleshooting.
A technician using the Klein Tools ET270 digital multimeter to test a standard 120V AC outlet. The display shows a voltage reading of 120V while simultaneously identifying an open ground wiring fault, demonstrated by the clear "Open Grd" indicator and a red alert light.
An electrician in a hard hat and protective high-voltage gloves uses the ET270 multimeter to probe a residential circuit breaker panel. The meter is placed at the base of the panel box and displays a steady reading of $275.0V$, illustrating its use in multi-phase electrical environments.
Close-up of the Klein Tools ET270 performing a GFCI trip test on a kitchen or bathroom style receptacle. The user is pressing the dedicated GFCI button, and the high-contrast display shows a trip time of 0.10 seconds, confirming the safety device is operating within specifications.
Professional application shot of the ET270 multimeter being used by a tradesman to troubleshoot a row of circuit breakers. The technician is wearing safety gear while using the red and black test leads to verify voltage across individual breakers in a complex electrical panel.
Close-up detail of the ET270 multimeter display showing $282.5V$ AC while testing industrial-grade circuit wiring. The image highlights the auto-ranging feature and the secure connection of the right-angle test leads into the common and voltage input jacks.
Digital Multi-Tester DMM with Receptacle Tester (ET270) promotional how to video
KLEIN TOOLS

Klein Tools ET270 Digital Multimeter and GFCI Receptacle Tester Kit TRMS Auto-Ranging 600V AC DC Voltage Resistance Continuity Battery and Outlet Test

Only 2 left
SKU: ET270
$64.98

Description

Klein promotional logo logout

Master Your Electrical Troubleshooting with the Ultimate 2-in-1 Tester Kit

The Klein Tools ET270 is a high-performance, auto-ranging digital multi-tester designed to streamline the workflow of professional electricians and serious DIYers alike. This versatile tool combines the precision of a professional multimeter with the specific diagnostic capabilities of a GFCI receptacle tester. Whether you are measuring AC/DC voltage up to 600V, testing resistance, or checking continuity, the ET270 delivers accurate results on a high-visibility 4000-count backlit display. Its rugged construction is built to survive a 6.6-foot drop, ensuring it remains a staple in your tool bag even in the most demanding job site environments.

Beyond standard multimeter functions, the ET270 features a specialized FIND mode that helps you quickly identify which breaker corresponds to a specific outlet, saving you countless trips back and forth to the electrical panel. The integrated receptacle tester identifies common wiring faults in North American 120V AC 3-wire outlets and provides critical data on GFCI devices, including the exact time to trip. Equipped with data hold, min/max values, and a durable storage pouch, this kit is the complete solution for inspecting, testing, and maintaining safe electrical systems.

Key Features

  • Advanced Auto-Ranging: Automatically selects the best range for measurements with a manual override option for specialized testing.
  • Comprehensive Circuit Testing: Detects and identifies common wiring faults in standard and GFCI electrical outlets.
  • GFCI Trip Diagnostics: Inspects GFCI devices and measures the specific time required to trip the safety mechanism.
  • Circuit Breaker Finder: Innovative FIND mode indicates which breaker corresponds to a given receptacle.
  • Rugged Durability: Rated for CAT III 600V safety and built to withstand a 6.6-foot (2 meter) drop.
  • Backlit 4000-Count Display: High-contrast LCD ensures readability in low-light work areas.
  • Battery Testing: Dedicated function for testing the health of 1.5V and 9V batteries.

What's Included

  • (1) ET270 Digital Multimeter / GFCI Tester
  • (1) Set of Right-Angle Test Leads
  • (1) Receptacle Test Cord
  • (1) Padded Storage Pouch
  • (2) AAA Batteries
  • (1) Instruction Manual

Specifications

Application Electrical Testing, Measuring, and Diagnostics
Voltage Range 600V AC/DC
Safety Rating CAT III 600V; Class 2 Double Insulation
Resistance (Ohms) 40MΩ
Frequency 50 to 60Hz
Drop Protection 6.6 Feet (2 Meters)
Display Type 4000 Count LCD with Backlight
Overall Length 6.41 Inches
Overall Width 3.13 Inches
Overall Height 1.84 Inches
Weight 1.32 lbs (21.1 oz)
Material ABS and Electrical Components

Pro-Tip: When using the FIND mode to locate a breaker, ensure the receptacle test cord is firmly seated. Once the signal is detected at the panel, toggle the breaker to confirm the display on the ET270 changes, ensuring you've found the exact circuit before beginning any repair work.