Klein Tools MM400 Multimeter, Digital Auto Ranging, AC/DC Voltage, Current, Capacitance, Frequency, Duty-Cycle, Diode, Contin

4.6 4.6 out of 5 stars | 4,360 ratings

Price: 43.99

Last update: 10-12-2024


About this item

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


From the manufacturer

klein
Klein

klein
About Klein Tools

As an American manufacturer of hand tools for more than 160 years, Klein Tools makes premium-quality, professional-grade tools that deliver performance, durability and precision. Our team continues to put six generations of expertise into each tool by using the highest quality materials and superior workmanship.

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.

Digital Multimeter, Auto-Ranging, 600V

Klein Tools MM400 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.

  • Measures up to 600V AC/DC voltage, 10A AC/DC current and 40 MΩ resistance
  • 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 and batteries

FEATURES

Klein Tools

Klein Tools

Klein Tools

Auto-ranging multimeter is CAT III 600 V safety rated

Meter measures up to 600 VAC/VDC voltage and 10 A AC/DC current

Electrical Tester for residential and industrial use

69028 69401 69410 69417 MM300
Customer Reviews
4.5 out of 5 stars
265
4.7 out of 5 stars
5,821
4.7 out of 5 stars
2,735
4.8 out of 5 stars
4,776
4.7 out of 5 stars
1,599
Price $16.99 $16.97 $19.00 $13.98 $51.33
Mfg. No. 69028 69401 69410 69417 MM300
Description Replacement Thermocouple Multimeter Carrying Case Replacement Test Lead Set, Right Angle Rare Earth Magnetic Hanger Digital Multimeter, Manual-Ranging, 600V
ET900 CL900 MM600 MM700
See Details
Customer Reviews
4.5 out of 5 stars
1,447
4.6 out of 5 stars
465
4.7 out of 5 stars
1,767
4.6 out of 5 stars
1,052
Price $17.99 $161.08 $89.99
Mfg. No. ET900 CL900 MM600 MM700
Description USB Digital Meter, USB-A (Type A) Digital Clamp Meter, AC Auto-Range TRMS, Low Impedance (LoZ), 2000 Amp Digital Multimeter, Auto-Ranging, 1000V Digital Multimeter TRMS/Low Impedance, 1000V

Top reviews from the United States

WRKMAN57
5.0 out of 5 stars Good basic meter for the price
Reviewed in the United States on September 14, 2024
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.
GB
5.0 out of 5 stars Big Features Small Size
Reviewed in the United States on November 20, 2022
I purchased this meter primarily because of the size. It will easily fit in a shirt pocket. I was impressed with all the features that Klein packed into this meter. The oversized display is easy to read although I did note like a previous reviewer that it can be somewhat difficult to see from an angle. I like the side entry test lead jacks. The jacks even light up depending on which function is selected, which may be helpful for less experienced technicians. It has a milliamp function which makes it useful for instrumentation applications. The microamp function works for burner flame signal troubleshooting. The frequency and capacitance and temperature functions are useful for HVAC applications. This meter has just as many features as a Fluke meter costing 4 times as much! It has a ruggedized shell that should protect the meter from daily use and abuse. Overall I am extremely impressed with this thing. Time will tell how it stands up to industrial and home use
Sparetime
5.0 out of 5 stars Like it
Reviewed in the United States on September 7, 2024
It works. Easy to use
Razorback
4.0 out of 5 stars Pleased! There was no reason to spend 3 times as much for the big name. Perfect for DIYer
Reviewed in the United States on October 4, 2023
(See ratings explanation below the review)

I'm a DIYer. There was no reason to spend 3 times the money to get the big name brand. This is a quality product. I went through the instructions and the online videos (lots of info available) and put it to use the first day.

My ratings system:
5 stars...... I'm blown away by quality & value... a must buy! (I rarely give this)
4 stars..... Pleasantly surprised, better than expected
3 stars..... as advertised, got what I expected, any pros/cons balanced
2 stars..... a little disappointed, I had hoped for better
1 star ..... avoid, waste of time and money, junk (I rarely give this)
George Nicholas
5.0 out of 5 stars Good value!
Reviewed in the United States on October 10, 2022
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!
Ray
5.0 out of 5 stars Meter
Reviewed in the United States on October 4, 2024
Great meter for the price.
Archie MacDonald
5.0 out of 5 stars Does everything that I need.
Reviewed in the United States on October 4, 2024
I do not use it daily as some would do, only occasionally when on a job site do a project start-up. It does everything that I need to do.
There is nothing that I dislike about it, not even the color.
Kevin S
5.0 out of 5 stars Very Nice little all-around multimeter.
Reviewed in the United States on June 17, 2024
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.

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