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Klein Tools TRMS Temp Auto-Ranging Digital Multimeter, 600V

Klein Tools MM420
SKU KLT-MM420
Klein's TRMS Temp Auto-Ranging Digital Multimeter is capable of measuring a wide multitude of electrical aspects. This unit is well suited for business, residential, and light industrial settings. See more useful tools at HomElectrical.com.
Klein Tools TRMS Temp Auto-Ranging Digital Multimeter, 600V

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Klein's TRMS Temp Auto-Ranging Digital Multimeter is capable of measuring a wide multitude of electrical aspects. This unit is well suited for business, residential, and light industrial settings. See more useful tools at HomElectrical.com.

TRMS Temp Auto-Ranging Digital MultimeterCAT III 600V safety ratingMeasures up to 600V AC/DC voltage, 10A AC/DC current & 50 MOhms resistance, test diodes, duty-cycle, continuity, temperature, and frequencyLED illumination for lead placementEasy-to-view backlit displayLead alert protectionLow battery indicatorDurable (withstands up to 6.6-ft)Requires 2 AAA batteries (included)Includes test leads and thermocouple with adapterFor use in residential, business, and light industrial settingsProduct

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Klein Tools MM420 Description

TRMS Temp Auto-Ranging Digital MultimeterCAT III 600V safety ratingMeasures up to 600V AC/DC voltage, 10A AC/DC current & 50 MOhms resistance, test diodes, duty-cycle, continuity, temperature, and frequencyLED illumination for lead placementEasy-to-view backlit displayLead alert protectionLow battery indicatorDurable (withstands up to 6.6-ft)Requires 2 AAA batteries (included)Includes test leads and thermocouple with adapterFor use in residential, business, and light industrial settingsProduct

Similar Multimeter/Voltmeter Products

Sperry GFCI Outlet Tester
Sperry GFCI Outlet Tester
$10.48Each
GFI6302N
Free Shipping Eligible
$64.98Each
In Stock-

Ships between 03/09/2026 - 03/17/2026

Klein Tools
Visit The Klein Tools Store
See more Klein Electrical Tester & Measurement

Product Specifications

Part NumberMM420
Application TypeAll Purposes
MaterialABS
Product Dimensions6-in X 3.16-in X 1.78-in
Weight0.52-lb
UPC092644693748

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Manufacturer Description

Klein Tools MM420 Multimeter is an auto-ranging, true root mean square (TRMS) multimeter that measures AC/DC voltage, AC/DC current, and resistance. It can also measure temperature, capacitance, frequency, duty-cycle, and test diodes and continuity. Klein Tools’ Test and Measurement product line was exclusively designed from the ground up by electricians for electricians. Years of field research, combined with extensive input from electricians across America, inspired the development of meters and electrical testers loaded with innovative, time-saving features.

Resources & Download

Specification Sheet
Installation Instruction

A PDF viewer is required to view this product's information. Download Adobe Acrobat Viewer

Prop65
Important PROP 65 InformationWarning: This product can expose you to chemicals, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov. to CA residents.
Klein's TRMS Temp Auto-Ranging Digital Multimeter is capable of measuring a wide multitude of electrical aspects. This unit is well suited for business, residential, and light industrial settings. See more useful tools at HomElectrical.com.
Klein Tools TRMS Temp Auto-Ranging Digital Multimeter, 600V
Free Shipping Eligible
$64.98Each
In Stock-

Ships between 03/09/2026 - 03/17/2026

Similar Multimeter/Voltmeter Products

Sperry GFCI Outlet Tester
Sperry GFCI Outlet Tester
$10.48Each
GFI6302N

Klein Tools MM420 Description

TRMS Temp Auto-Ranging Digital MultimeterCAT III 600V safety ratingMeasures up to 600V AC/DC voltage, 10A AC/DC current & 50 MOhms resistance, test diodes, duty-cycle, continuity, temperature, and frequencyLED illumination for lead placementEasy-to-view backlit displayLead alert protectionLow battery indicatorDurable (withstands up to 6.6-ft)Requires 2 AAA batteries (included)Includes test leads and thermocouple with adapterFor use in residential, business, and light industrial settingsProduct

Product Specifications

Klein Tools
Visit The Klein Tools Store
Part NumberMM420
Application TypeAll Purposes
MaterialABS
Product Dimensions6-in X 3.16-in X 1.78-in
Weight0.52-lb
UPC092644693748

Shop Top 100 Tools & Hardware Products.

View other Multimeter/Voltmeter Best Sellers.

Manufacturer Description

Klein Tools MM420 Multimeter is an auto-ranging, true root mean square (TRMS) multimeter that measures AC/DC voltage, AC/DC current, and resistance. It can also measure temperature, capacitance, frequency, duty-cycle, and test diodes and continuity. Klein Tools’ Test and Measurement product line was exclusively designed from the ground up by electricians for electricians. Years of field research, combined with extensive input from electricians across America, inspired the development of meters and electrical testers loaded with innovative, time-saving features.

Resources & Download

Specification Sheet
Installation Instruction

A PDF viewer is required to view this product's information. Download Adobe Acrobat Viewer

Prop65
Important PROP 65 InformationWarning: This product can expose you to chemicals, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov. to CA residents.

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