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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

  • Team affiliation1 Piece
  • Key featuresMultimeter, Voltage Tester, Cat Iii 600v Safety Rating, Batt
  • Overall height9.33 L x 5.08 W x 3.82 H inches
  • Overall width9.33 L x 5.08 W x 3.82 H inches
  • Overall length9.33 L x 5.08 W x 3.82 H inches
  • Product weight0.87 lb (0.39 kg)
  • 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.

How it compares

Measured against everything we stock in Multimeters & Electrical Testers, at today’s prices. Recalculated every night.

Price $41.99
Pricier than about 66% of the 971 comparable items (median $30.99).

Specifications

Product
Brand nameaFe Power
Product typeMultimeters, Tach & Dwell Meters
Size & build
Overall height9.33 L x 5.08 W x 3.82 H inches
Overall width9.33 L x 5.08 W x 3.82 H inches
Overall length9.33 L x 5.08 W x 3.82 H inches
Product weight0.87 lb (0.39 kg)
More details
Team affiliation1 Piece

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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