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KLEIN TOOLS

Klein Tools MM325 Multimeter, Digital Manual-Ranging 600V AC/DC Voltage Tester, Tests Batteries, Current, Resistance, Diodes, and Continuity

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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Sep 24
Order within 11 hours and 41 minutes
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Features

  • VERSATILE FUNCTIONALITY: Measures AC/DC voltage up to 600V, 10A DC current, 2M resistance; additional features include continuity, diode test and battery test
  • LEAD-ALERT PROTECTION: LEDs on the meter illuminate to indicate proper test lead placement, enhancing accuracy and safety during measurements
  • BACKLIT DISPLAY: LCD shows clear readings in low-light conditions for enhanced visibility
  • BATTERY TEST: Battery test mode can be used for checking if batteries are working
  • CONVENIENT FEATURES: Test lead holders on the back of the meter, kickstand and optional magnetic hanger (Cat. Nos. 69445 or 69417) for hands-free operation
  • DURABLE CONSTRUCTION: Built to withstand a 6.6-Foot (2 m) drop, for use in basic and controlled electromagnetic environments such as residential, business and light-industrial locations
  • COMPLETE PACKAGE: Includes test leads with CAT III/CAT IV safety caps, instructions, and 2 x AAA batteries

Description

Klein Tools MM325 Multimeter is a manual-ranging multimeter that measures AC/DC voltage, DC current, and resistance. It can also test batteries, 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. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857.

Brand: KLEIN TOOLS


Power Source: Battery Powered


Style: Protection,Safety


Color: Orange/ Black


Item Weight: 13.92 ounces


Brand: ‎KLEIN TOOLS


Power Source: ‎Battery Powered


Style: ‎Protection,Safety


Color: ‎Orange/ Black


Item Weight: ‎13.92 ounces


Item dimensions L x W x H: ‎9.33 x 5.08 x 3.82 inches


Min. Operating Voltage: ‎9 Volts


Specification Met: ‎Cat Iii 600v Safety Rating


Upper Temperature Rating: ‎60 Degrees Celsius


Measurement Type: ‎Multimeter


Maximum Operating Voltage: ‎600 Volts


UPC: ‎092644693731


Manufacturer: ‎Klein Tools


Global Trade Identification Number: ‎31


Part Number: ‎MM325


Item Weight: ‎13.9 ounces


Product Dimensions: ‎9.33 x 5.08 x 3.82 inches


Item model number: ‎MM325


Batteries: ‎2 AAA batteries required. (included)


Is Discontinued By Manufacturer: ‎No


Size: ‎One Size


Finish: ‎Brushed


Material: ‎Blend


Pattern: ‎Tester


Shape: ‎Rectangular


Item Package Quantity: ‎1


Measurement Accuracy: ‎+/- 2%


Special Features: ‎Lead Alert; Backlight; Auto Power-Off; Data Hold


Included Components: ‎Multimeter, Voltage Tester


Batteries Included?: ‎Yes


Batteries Required?: ‎Yes


Battery Cell Type: ‎Alkaline


Date First Available: June 27, 2022


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Sep 24

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Great price for a quality product. Pays for itself and then some.
Perfect for home use. Paid for itself with first use. Fixed my robot vacuum saving hundreds in replacement cost and kept it out of the landfill as a bonus. A simple $20 part and we were back up and running like a cleaning warrior. Simple and safe. Compact, lightweight with an nicely organized design. ... show more
Reviewed in the United States on April 21, 2025 by MYC61
    • Excellent Meter and a Great Value
This unit is very high quality with great features. Even little things like the lead holder on the back are great. The switch knob has a good feel to it and strong detents. Easy to operate. I like the green lights that ensure I've connected the leads correctly. Klein in known to be the best and they proved it again with this meter. ... show more
Reviewed in the United States on July 2, 2025 by Operations Rick
    • Works fine.
Easy to use and seems sturdy. Time will tell when I try to measure the voltage of the next lightning bolt that hits my house.
Reviewed in the United States on August 31, 2025 by Chris Field
    • Works Well
This tester is much higher quality than what you’d get at local auto places. It reads good and is efficient in testing. Well worth the money for the quality. No issues yet but I’ll update with any that come up. Awesome look to it!
Reviewed in the United States on August 5, 2025 by Kole Davis
    • Great thing to have around the house to even use on your car.
The media could not be loaded. It’s very robust good switches. It did what I wanted to, which is check voltage and resistance and everything and has the light to know when the leads are connected. This is good for checking the voltage of small batteries or even a 12 V car battery or even something bigger on a hybrid. It’s cat three rated so I believe it’s red for 1000 V. The only drawback to this is the back plate getting the batteries out is a pain. It doesn’t come with a screwdriver. You have to have a Phillips screwdriver and it’s really hard to get in and out of but overall it’s a good Multimeter. ... show more
Reviewed in the United States on October 2, 2024 by James Carlson
    • Great meter
Great investment, easy to use and great features. The only improvement I would add is having better views of the display screen on different angles.
Reviewed in the United States on September 10, 2025 by Coolcal
    • Great for DIYers!
First, this ~$20 machine easily saved me $500. I have no experience in electrical panels either. I watched a quick youtube video on how to check circuit breaker power and bingo. I had power missing in part of my house and no breakers were tripped. All the breakers had power, or at least inside the house. Checked the outside breaker box, no breakers were labeled btw. Four switches didn't have power, and I discovered a separate trip switch. Turned that trip switch off, got power to the four. Then my stove didn't have power (the only thing left without power). I used the multimeter to check the plug-in for the stove and it didn't have power either. Used the multimeter to check the current in the power cord of the stove just in case, power cord was fine. Went back to the outside breaker box, turns out the "trip switch" wasn't a trip switch. Turned that back on, and boom power back to everything. Long story short, I used this multimeter with ease. It did the job, helped me trial and error breakers, wires and plug ins with no problem. Highly recommend for routine house electrical problems. ... show more
Reviewed in the United States on August 15, 2025 by Amazon Customer
    • It's a great piece of test equipment.
Nice meter. I like the rubberized shell. I own a Fluke meter, but it's hundreds of miles away and needed somethin now. I like that it powers up on 2 AAA batteries. Not a 9v like the Fluke. It has all the same functions and after some testing, it seems to be very accurate. I like the ease of the battery compartment and in that same place, is where the 2 safety fuses are located. The compartment is held shut by a single Phillips screw. Light and not too large. I think that I shall enjoy this meter. ... show more
Reviewed in the United States on September 3, 2025 by Richard Brewton

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