A direct front studio shot of the Klein Tools MM720 digital multimeter. The professional-grade orange and black device features a large backlit reverse contrast LCD, a multi-function rotary selector dial, and dedicated tactile buttons for range, relative, max/min, and data hold functions.
A product infographic for the Klein Tools MM720 highlighting its advanced diagnostic sensing. Text callouts detail its ability to measure 1000V AC/DC, 10A current, and 60M Ohms resistance, alongside temperature measurements up to 1832 degrees Fahrenheit. Technical icons confirm a 2-meter drop protection and IP42 rating.
A technical infographic showing the MM720's intelligent interface. The graphic highlights the high-visibility reverse contrast LCD, the integrated optical sensor for automatic brightness adjustment, the auto-ranging dial with manual override, and the Low Impedance (LoZ) mode for ghost voltage elimination.
The back view of the MM720 digital multimeter highlighting its ergonomic jobsite features. The image showcases the built-in kickstand for hands-free viewing, integrated test lead storage holders, and the mount for an optional magnetic hanger for versatile positioning during electrical maintenance.
An angled perspective shot of the MM720 multimeter with its heavy-duty kickstand deployed. The high-contrast reverse LCD is clearly visible, emphasizing the tool's rugged industrial design and ease of use in professional field environments.
A high-resolution front shot of the Klein Tools MM720 TRMS multimeter focusing on the connection ports. The image displays the four safety-shrouded input jacks for 10A current, milliamp/microamp sensing, common ground, and voltage/resistance/temperature testing.
The back view of the MM720 showing the test leads securely clipped into the integrated vertical holders. This view highlights the streamlined storage design that protects the lead tips while the multimeter is being transported in a tool bag.
Detailed view of the Klein Tools safety-rated test leads. The set includes a red and a black lead with right-angle connectors, flexible silicone insulation, and sharp stainless steel tips protected by removable CAT III/CAT IV safety caps.
A close-up view of the K-type thermocouple probe included with the MM720 kit. The thermal probe features a yellow industry-standard connector and braided insulation, designed for accurate HVAC and electrical temperature diagnostics.
An action shot showing a professional electrician using the MM720 to diagnose an industrial electrical panel. The technician, wearing insulated safety gloves and a hard hat, uses the test leads to verify a 121.3V reading on the backlit reverse contrast LCD, demonstrating the tool's performance in a commercial environment.
Person wearing a hard hat and gloves working on electrical panel with a multimeter
Person wearing a hard hat and blue gloves using an orange multimeter on electrical panel.
Person holding an orange and black device in front of a control panel.
Five digital multimeters from Klein Tools with specifications listed below.
Klein Tools Digital Multimeters (MM325, MM420, MM450, MM720) promotional video
A direct front studio shot of the Klein Tools MM720 digital multimeter. The professional-grade orange and black device features a large backlit reverse contrast LCD, a multi-function rotary selector dial, and dedicated tactile buttons for range, relative, max/min, and data hold functions.
A product infographic for the Klein Tools MM720 highlighting its advanced diagnostic sensing. Text callouts detail its ability to measure 1000V AC/DC, 10A current, and 60M Ohms resistance, alongside temperature measurements up to 1832 degrees Fahrenheit. Technical icons confirm a 2-meter drop protection and IP42 rating.
A technical infographic showing the MM720's intelligent interface. The graphic highlights the high-visibility reverse contrast LCD, the integrated optical sensor for automatic brightness adjustment, the auto-ranging dial with manual override, and the Low Impedance (LoZ) mode for ghost voltage elimination.
The back view of the MM720 digital multimeter highlighting its ergonomic jobsite features. The image showcases the built-in kickstand for hands-free viewing, integrated test lead storage holders, and the mount for an optional magnetic hanger for versatile positioning during electrical maintenance.
An angled perspective shot of the MM720 multimeter with its heavy-duty kickstand deployed. The high-contrast reverse LCD is clearly visible, emphasizing the tool's rugged industrial design and ease of use in professional field environments.
A high-resolution front shot of the Klein Tools MM720 TRMS multimeter focusing on the connection ports. The image displays the four safety-shrouded input jacks for 10A current, milliamp/microamp sensing, common ground, and voltage/resistance/temperature testing.
The back view of the MM720 showing the test leads securely clipped into the integrated vertical holders. This view highlights the streamlined storage design that protects the lead tips while the multimeter is being transported in a tool bag.
Detailed view of the Klein Tools safety-rated test leads. The set includes a red and a black lead with right-angle connectors, flexible silicone insulation, and sharp stainless steel tips protected by removable CAT III/CAT IV safety caps.
A close-up view of the K-type thermocouple probe included with the MM720 kit. The thermal probe features a yellow industry-standard connector and braided insulation, designed for accurate HVAC and electrical temperature diagnostics.
An action shot showing a professional electrician using the MM720 to diagnose an industrial electrical panel. The technician, wearing insulated safety gloves and a hard hat, uses the test leads to verify a 121.3V reading on the backlit reverse contrast LCD, demonstrating the tool's performance in a commercial environment.
Person wearing a hard hat and gloves working on electrical panel with a multimeter
Person wearing a hard hat and blue gloves using an orange multimeter on electrical panel.
Person holding an orange and black device in front of a control panel.
Five digital multimeters from Klein Tools with specifications listed below.
Klein Tools Digital Multimeters (MM325, MM420, MM450, MM720) promotional video
KLEIN TOOLS

Klein Tools MM720 Digital Multimeter TRMS Auto Ranging 1000V AC DC Multimeter Reverse Contrast LCD Measures Current Resistance Temperature Capacitance LoZ

Only 2 left
SKU: MM720
$99.97

Description

Klein promotional logo logout

Superior Diagnostic Accuracy: The Klein Tools MM720 TRMS Multimeter with Smart Light-Sensing Display

The Klein Tools MM720 is a professional-grade, automatically ranging True Root Mean Square (TRMS) digital multimeter engineered to provide unparalleled precision in residential, commercial, and light-industrial environments. Capable of measuring AC/DC voltage up to 1000V and current up to 10A, this versatile tester is a must-have for identifying complex electrical issues. Its standout feature is the high-visibility reverse contrast LCD, which utilizes an integrated optical sensor to automatically adjust brightness—ensuring crystal-clear readouts whether you are working in a dimly lit electrical vault or under the harsh glare of direct sunlight.

Designed for safety and performance, the MM720 includes a dedicated Low Impedance (LoZ) mode to identify and eliminate "ghost" or stray voltages that can lead to false readings. Beyond standard voltage and current sensing, this robust meter measures resistance up to 60 MOhms, temperature via the included thermocouple, capacitance, frequency, and duty cycle. Built to thrive on demanding jobsites, the MM720 features a rugged "Tough Meter" design that is drop-tested to 6.6 feet (2m) and rated IP42 for dust and water resistance. With its CAT IV 600V safety rating and ergonomic industrial housing, it delivers the laboratory-level data required for certifying electrical system integrity.

Key Features

  • Intelligent Reverse Contrast Display: Built-in optical sensor automatically optimizes screen viewability for any ambient lighting condition.
  • Advanced TRMS Technology: Automatically ranging True Root Mean Square measurement provides maximum accuracy on non-linear electrical loads.
  • Low Impedance (LoZ) Mode: Specialized setting for detecting and discarding phantom or stray voltages.
  • Comprehensive Diagnostic Range: Measures up to 1000V AC/DC voltage, 10A AC/DC current, resistance, and temperature.
  • Jobsite Durable: Industrial-strength housing is drop-tested to 6.6 feet (2m) with an IP42 ingress protection rating.
  • Professional Safety Certified: Rated CAT IV 600V and CAT III 1000V for high-level protection in basic and controlled electromagnetic environments.

What's Included

  • (1) MM720 Digital Multimeter
  • (1) Set of Test Leads with CAT III/CAT IV Safety Caps
  • (1) Thermocouple with Adapter
  • (2) AAA Alkaline Batteries
  • (1) Protective Carrying Pouch
  • (1) Instruction Manual

Specifications

Voltage Range 1000V AC / 1000V DC
Current Range 10A AC / 10A DC
Temperature Range -40° to 1832°F (-40° to 1000°C)
Resistance (Ohms) 60MΩ
Capacitance 6000 µF
Safety Rating CAT IV 600V / CAT III 1000V
Frequency Range 1 Hz - 500 KHz
Ingress Protection IP42
Drop Protection 6.6 ft (2 m)
Overall Length 6.94 in (17.6 cm)
Overall Width 3.37 in (8.6 cm)
Weight 12.2 oz (346 g)

Pro-Tip: Ghost voltages are often caused by the capacitive coupling between energized wires and adjacent dead wires. When checking for the presence of power in a conduit where wires run parallel, always use the LoZ (Low Impedance) mode first. If the voltage reading disappears in LoZ mode but was present in standard mode, you are likely dealing with a ghost voltage rather than a live circuit.