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Klein Tools

Klein Tools MM325

Actual products · maker photographs

Klein Tools MM325 Digital Multimeter, Manual-Ranging, 600V
Klein MM325MM325
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Klein Tools MM420 Auto-Ranging True RMS Digital Multimeter (600V)
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Inspect the actual tool

Marked measurement category

CAT III 600V

The category and its voltage belong together. Match both to the installation; the voltage range alone does not establish the category.

The buying trap. A capability or category marking does not approve the leads, setup or a live procedure.

Open the source rows
Safety rating
CAT III 600V; CE and UKCA certified

Source record: MM325

Manufacturer specifications recorded by thisMETER. These are not our own measurements. References belong to this product record; a field-by-field source mapping is not claimed.

Safety rating
CAT III 600V; CE and UKCA certified

Record checked 2026-11-05.

Klein MM325. CAT III 600V

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Manual-ranging multimeter with test leads and batteries.

MM325 meter only

A verified retailer offer is not recorded.

Specifications checked November 5, 2026. Full product details

Klein Tools MM325 Digital Multimeter, Manual-Ranging, 600V

A manual-ranging digital multimeter that measures up to 600V AC/DC, 10A DC current and 2MΩ of resistance, and tests batteries, diodes and continuity.

Which version should you buy?

Selected package: MM325 meter only.

Selected package

  • MM325 meter only

    This page

    Model: MM325

    What differs
    Manual-ranging multimeter with test leads and batteries.

Bundles and accessories

  • MM320KIT test kitModel: MM320KIT

    Contents and availability

    Bundles the meter with additional testers in a kit.

Purchase links appear where the exact offer is verified. Confirm the named model, quantity and accessories before ordering.

Watch out

  • MM325 is the bare manual-ranging meter; a listing with extra testers is the MM320KIT.

Why people pick it

  • CAT III 600V rating with capped test leads, a real safety rating at a basic multimeter price point
  • Lead Alert warns when the leads are in the wrong jack for the selected function
  • Covers the whole home-and-auto checklist: AC/DC volts, DC amps, ohms, diodes, continuity and battery tests
  • Designed with electricians' input, with 6.6 ft drop protection and auto power-off

Know before you buy

  • Manual ranging: you pick each range on the dial, which teaches the ranges but slows casual checks
  • DC current only; it does not measure AC current (a clamp meter adds that)
  • Voltage accuracy is ±2%, coarser than mid-range meters
  • 2000 counts and no true RMS

Full specifications

TypeDigital multimeter, manual-ranging
FunctionsAC/DC voltage up to 600V, DC current up to 10A, resistance up to 2MΩ; tests batteries, diodes and continuity
Display2000-count LCD with backlight
Special featuresLead Alert, backlight, auto power-off, data hold
AccuracyVoltage ±2% (Klein's published figure)
Safety ratingCAT III 600V; CE and UKCA certified
Drop protection6.6 ft (2 m)
ColorOrange / black
Batteries2 x AAA (included)
IncludedMultimeter, test leads with CAT III/CAT IV safety caps, instructions, 2 x AAA batteries
Size6.41 x 3.13 x 1.83 in (16.3 x 8 x 4.6 cm)
Weight8.8 oz (249 g)

From manufacturer documentation, checked November 5, 2026. Spotted an error? Tell us.

Alternatives to consider

Fluke 107 Pocket Digital Multimeter

Fluke 107

Max voltage
600 V
Display counts
6,000 counts
Specifications & conditions
Safety rating
CAT III 600V
Max current
10 A

A palm-size 6,000-count multimeter rated CAT III 600V that measures AC and DC voltage and current to 600 V and 10 A, plus resistance, capacitance, frequency and duty cycle; it is not True RMS.

Check package and model options

  • Home DIY
  • Beginners
  • Budget
KAIWEETS HT118A True RMS Auto-Ranging Digital Multimeter

KAIWEETS HT118A

Max voltage
1,000 V
Display counts
6,000 counts
Specifications & conditions
Safety rating
CAT III 1000V, CAT IV 600V
Max current
10 A

A 6,000-count auto-ranging True RMS multimeter with non-contact voltage and live-wire detection, LED-lit input jacks, a flashlight and temperature measurement, rated CAT III 1000V and CAT IV 600V.

  • Home DIY
  • Beginners
  • Budget