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Klein Tools

Klein Tools MM400 Multimeter, Digital Auto Ranging, AC/DC Voltage, Current, Capacitance, Frequency, Duty-Cycle, Diode, Continuity, Temp 600V

  • Based on 4,370 reviews
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Returnable until Jan 31, 2025

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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Jun 28
Order within 22 hours and 49 minutes
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Style: Multimeter


Features

  • Multimeter measures up to 600V AC/DC voltage, 10A AC/DC current and 40 MOhms resistance
  • Electrical tester measures temperature, capacitance, frequency, duty-cycle, and test diodes and continuity
  • CAT III 600V safety rating
  • Built to withstand a 3.3-foot (1 m) drop and withstand daily wear and tear on the job site
  • Low battery indicator and easily accessible battery compartment
  • For use in basic and controlled electromagnetic environments such as residential, business and light-industrial locations
  • Includes test leads, thermocouple with adapter, batteries and user manual

Description

Klein Tools MM400 Multimeter is an auto-ranging multimeter that measures AC/DC voltage, AC/DC current, and resistance. It can also measure temperature, capacitance, frequency, duty-cycle, and test 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: Multimeter


Color: Orange


Item Weight: 8.2 Ounces


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 1.78 x 3.07 x 6 inches; 8.2 ounces


Item model number ‏ : ‎ MM400


Department ‏ : ‎ Unisex Adult


Batteries ‏ : ‎ 2 AAA batteries required.


Date First Available ‏ : ‎ November 23, 2015


Manufacturer ‏ : ‎ Klein Tools


Best Sellers Rank: #16,217 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #30 in Multi Testers


#30 in Multi Testers:


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jun 28

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.

Similar Products

Top Amazon Reviews

    • Works Great
Style: Multimeter
I've had this multimeter for about a year and I love it. It's very versatile and not too difficult to use. Very durable, nice looking, functional. Klein makes generally great products.
Reviewed in the United States on October 16, 2024 by Doug
    • Terrific multimeter, with excellent display
Style: w/Lead Alert
A friend gave me his Klein MM 1000. He is an electrician. It was pretty beat up and have been used for many years in a tough environment. I was really impressed with the capabilities of it. However the switch eventually gave up. I wanted to find something similar and was pleased to find the client MM 420. It can "only" deal with up to 600 V circuits, which is not going to be a problem for me. It measures all the important electrical requirements and also includes temperature with an included thermocouple. I bought this one because the display looked really nice, and it is. They changed the LCD color and it really stands out, especially when backlit. Klein multimeter are "bench tested." I put this in quotes because this particular bench test means that they can handle a 3 foot drop off of a bench. I have been happy with every Klein tool I've ever bought. They offer excellent quality at very competitive prices. You can buy very basic all the way up to professional. The fact that my friend, who has been a career electrician, uses Klein multimeter was certainly a plus to me. Very happy with this purchase. ... show more
Reviewed in the United States on October 18, 2024 by Steve-o
    • Good basic meter for the price
Style: w/Lead Alert
I got this meter and the Klein case as a replacement meter for work. At about half the cost of what it replaced, it does well. The switch seems solid enough. The rubber bumper housing is handy on the job. The back light is giving good visibility. I am pleased.
Reviewed in the United States on September 14, 2024 by WRKMAN57
    • Works great, but takes a second to get a reading.
Style: w/Lead Alert
I use this meter at work mainly for checking voltage on automobiles and for the continuity function. Works perfectly, but I dislike the amount of time it takes to beep when there's continuity. I'm used to instant responses with my older meter. I understand it's more accurate in all its other functions, but if I'm checking 30+ fuses on a car , I want to get it done quickly. Feels like a bad connection because of the delay even though it's not. ... show more
Reviewed in the United States on August 7, 2024 by Daniel Z
    • Good value!
Style: Slim Meter
I've been a fan of Klein Tools for years, so considering a Klein multimeter wasn't difficult at all. I've used mostly Fluke multimeters in my 40+ year carreer as a technician. They are considered the best of the best. With that accuracy, repeatability, and quality, you pay dearly! So I was looking for a second lower-cost meter. I was also looking for a reverse backlit display--white numerals on a black background. I'd looked at Milwaukee, but they do not include a diode check function. I chose the MM450 for it's features and price point. While I have not compared accuracy to other meters, published specs are similar to other more expensive meters. There is one minor issue in my review, and that is the white-on-black display needs to be viewed pretty much head-on for best quality. Depending on the tilt angle, there are positions where the display is very faded, almost to disappear. That might be an issue if you measuring in tight quarters or not able to look straight on otherwise. It comes with test and temperature probes, and fabric case. An optional rare-earth magnetic hanging strap is available. Besides voltage and current, it also measures resistance, capacitance and frequency, along with a peak hold function, making it an ideal meter for most service techs. One other minor detail...when in Auto scale mode, it can take up to 5 seconds for the reading to finally resolve. If you are troubleshooting something point to point and in a hurry, this may be an annoyance. However, if you turn off the Auto-scale mode, the readings display quite a bit faster. Given the display issue (and that might not be a problem for everyone) I'd give it a 4.5, if that were possible. But it's certainly better than a 4, so a 5 it is! ... show more
Reviewed in the United States on October 10, 2022 by George Nicholas
    • Meter
Style: Multimeter
Great meter for the price.
Reviewed in the United States on October 4, 2024 by Ray
    • Very Nice little all-around multimeter.
Style: w/Lead Alert
I haven't used it a lot yet, but from the few times I have used it, it appears to be accurate and definitely easy to use. I like the audible signal when checking for Continuity. This MM420 is capable of everything that I need it to do. Well, most things. It won't measure the mood of my wife, accurately indicate which stock I should invest in, or display warnings if I am in over my head. But for most electrical things, this is a nice little all-around multimeter. ... show more
Reviewed in the United States on June 17, 2024 by Kevin S
    • Works fine
Style: w/Lead Alert
Nice multimeter, good options and scales. Have used a few times and works well.
Reviewed in the United States on October 10, 2024 by A. Armstrong

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