Klein Tools MM325 Digital Mult...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$39.67
Klein Tools MM325 Digital Multimeter, Manual-Ranging, 600V

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

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Model: MM325

In Stock (leaves warehouse same day if ordered before 3pm ET)

$39.67
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  • Warnings

    • Use personal protective equipment to prevent shock and arc blast injury where hazardous live conductors are exposed.
    • Do not use the meter during electrical storms or in wet weather, and do not use the meter or test leads if they appear to be damaged.
    • Before each use verify meter operation by measuring a known voltage or current.
    • Read, understand and follow all instructions, cautions and warnings attached to and /or packed with all test and measurement devices before each use.

  • Features

    • Includes carrying pouch, test leads, thermocouple with adapter, and batteries
    • High-Visibility Display with Optical Sensor; Auto-Range; Min/Max/Relative; Low Impedance (LoZ) Mode; Auto Power-Off; Data Hold
    • Low battery indicator and easily accessible battery and fuse compartment
    • For use in basic and controlled electromagnetic environments such as residential, business and light-industrial locations
    • Low Impedance (LoZ) mode for identifying and eliminating ghost or stray voltages
    • CAT IV 600V Safety Rating
    • High visibility, reverse contrast display with optical sensor to automatically optimize viewability in dark or bright ambient lighting
    • Tough meter built to withstand a 6.6-Foot (2 m) drop and is rated IP42
    • Multimeter with automatic ranging true root mean square (TRMS) technology for increased accuracy
    • Tester measures up to 1000V AC/DC voltage, 10A AC/DC current and 60 MOhms resistance plus temperature, capacitance, frequency, low impedance (LoZ), duty-cycle, test diodes and continuity


MM720 - spec sheet

Manufacturer Resources

Spec Sheet

Product Specs

Product Subgroup:
Multimeters
Product Group:
Test & Measurement
Product Details:
Digital Multimeter
Drop Protection:
6.6' (2 m)
Product Type:
Digital Multimeter
Department:
Electrical
Batteries:
2 x AAA

Klein Tools MM325 – Frequently Asked Questions

1) What's the difference between the Klein Tools MM325 and MM720 multimeters?
They're two different voltage classes of the same Klein digital multimeter family. The MM325 is the 600V model; the MM720 is the 1000V model. If you're working residential and light commercial branch circuits, 600V covers it. If you're touching 480V three-phase gear where transients and higher potentials are in play, order the MM720.
2) Will a Klein MM720 multimeter read ghost voltage on a long conductor run?
It won't be fooled by it. The MM720 has a Low Impedance (LoZ) mode specifically for identifying and eliminating ghost or stray voltages, which is the common headache when a high-impedance meter picks up induced voltage on an unloaded conductor sharing a raceway. Switch to LoZ and the reading collapses if the voltage isn't real.
3) Is the Klein MM720 multimeter rated CAT IV, and what environments is it meant for?
CAT IV 600V is the stated safety rating on the MM720. Klein calls it out for basic and controlled electromagnetic environments such as residential, business, and light-industrial locations. For work where hazardous live conductors are exposed, wear PPE against shock and arc blast, and verify the meter against a known voltage before each use.
4) What does the Klein MM720 multimeter actually measure besides volts and amps?
Measurement range on the MM720 runs to 1000V AC/DC, 10A AC/DC current, and 60 MOhms resistance, plus temperature, capacitance, frequency, low impedance (LoZ), duty-cycle, diode test, and continuity. The temperature function is usable out of the box because a thermocouple with adapter is included.
5) What comes in the box with the Klein MM720 multimeter, or do I need to buy leads separately?
Nothing else to buy to start testing. The MM720 ships with a carrying pouch, test leads, a thermocouple with adapter, and batteries. The meter runs on 2 x AAA cells, and the battery and fuse compartment is accessible without tearing the meter down, so a blown current fuse is a field fix.
6) Can this Klein multimeter survive a drop off a ladder, and is it rated for dust or water?
The MM720 is built to withstand a 6.6-foot (2 m) drop and carries an IP42 rating. IP42 means protection from solid objects over 1 mm and dripping water at a slight angle, so it tolerates jobsite dust and light drips but is not a wash-down or wet-weather tool. Klein specifically says not to use the meter during electrical storms or in wet weather.
7) Is the Klein MM720 auto-ranging or do I have to select the range manually?
Auto-ranging, with true RMS (TRMS) measurement for better accuracy on non-sinusoidal loads like VFD outputs and electronic ballasts. It also carries Min/Max/Relative, Data Hold, and auto power-off, so you can capture a motor inrush peak or hold a reading while you get out of a panel.
8) Can you read this multimeter's display inside a dark electrical room?
Yes. The MM720 uses a high visibility reverse contrast display with an optical sensor that automatically optimizes viewability in dark or bright ambient lighting, so you are not fighting glare on a rooftop unit or squinting in an unlit crawlspace. A low battery indicator is on the display as well.
How fast can I get the Klein Tools MM325 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Klein Tools MM325 come with a warranty?
Absolutely. The Klein Tools MM325 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Klein Tools MM325?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Klein Tools MM325 from ZenSupply?
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