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Yellow digital multimeter with backlit LCD display, test leads, and kickstand

Klein Tools MM325 Multimeter 600V AC/DC

SKU CH-3Q0Q-TSRE5

Measures AC/DC voltage to 600V, 10A DC current and 2M resistance with lead-alert LEDs and backlit display

  • FeaturesMultimeter, Voltage Tester, Cat Iii 600v Safety Rating, Batt
  • Height9.33 L x 5.08 W x 3.82 H inches
  • Width9.33 L x 5.08 W x 3.82 H inches
  • Length9.33 L x 5.08 W x 3.82 H inches
  • Weight0.87 pounds
  • Sports Team1 Piece
  • Measures AC/DC voltage up to 600V for electrical safety
  • Lead-alert LEDs show correct test-lead placement to prevent errors
  • Backlit LCD gives clear readings in low-light conditions
  • Built to survive a 6.6-foot drop for job-site durability
  • Includes test leads with CAT III/IV caps plus two AAA batteries

Professional multimeter for electricians

The Klein Tools MM325 is a manual-ranging multimeter designed for electricians who need reliable AC/DC voltage, DC current and resistance measurements in residential, business and light-industrial environments. It also tests batteries, diodes and continuity, covering the core tasks of daily electrical work.

Sustained-use safety and durability

The meter carries a CAT III 600 V safety rating and is built to survive a 6.6-foot drop, so it remains accurate after repeated jobsite handling. Lead-Alert LEDs warn of incorrect test-lead placement during extended sessions, while the backlit LCD keeps readings visible in low-light conditions without eye strain.

Manual-ranging operation defines the workflow

This model requires the user to select the correct range for each measurement, which suits technicians who prefer direct control over auto-ranging convenience. Buyers who need automatic range selection or true-RMS accuracy for distorted waveforms should consider a different instrument.

Highlights

  • Measures AC/DC voltage up to 600V for electrical safety
  • Lead-alert LEDs show correct test-lead placement to prevent errors
  • Backlit LCD gives clear readings in low-light conditions
  • Built to survive a 6.6-foot drop for job-site durability
  • Includes test leads with CAT III/IV caps plus two AAA batteries

Specifications

BrandaFe Power
FeaturesMultimeter, Voltage Tester, Cat Iii 600v Safety Rating, Battery Powered, true
Height9.33 L x 5.08 W x 3.82 H inches
Width9.33 L x 5.08 W x 3.82 H inches
Length9.33 L x 5.08 W x 3.82 H inches
Weight0.87 pounds
Sports Team1 Piece
TypeMultimeters, Tach & Dwell Meters

Questions about this item

How much power does the MM325 draw when it is left on all day?

The meter runs on two AAA batteries and includes a low-battery indicator; typical current draw is very low so a set of cells lasts through extended daily use.

What must I already own to start measuring with the MM325?

The package ships with test leads, CAT III/CAT IV safety caps, instructions and two AAA batteries, so no extra items are required for basic voltage, current, resistance, diode, continuity or battery tests.

Can I use the MM325 with the magnetic hanger accessories I already have from earlier Klein kits?

Yes, the meter accepts the optional magnetic hangers catalog numbers 69445 and 69417 for hands-free operation.

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