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Klein Tools MM400 Multimeter, Digital Auto Ranging, AC/DC Voltage, Current, Capacitance, Frequency, Duty-Cycle, Diode, Continuity, Temp 600V
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Purchase options and add-ons
Brand | Klein Tools |
Power Source | Battery Powered |
Style | Multimeter |
Color | Orange |
Item Weight | 8.2 Ounces |
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
Frequently bought together
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Product details
- 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
- ASIN : B018EXZO8M
- Country of Origin : China
- Best Sellers Rank: #12,863 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement)
- #29 in Multi Testers
- Customer Reviews:
Product 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.
Important information
Safety Information
Do not attempt to measure resistance or continuity on live circuits.Read, understand and follow all instructions, cautions and warnings attached to and /or packed with all test and measurement devices before each use.Before each use verify meter operation by measuring a known voltage or current.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.
From the manufacturer
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
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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 | |
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Customer Reviews |
4.5 out of 5 stars
248
|
4.7 out of 5 stars
5,795
|
4.7 out of 5 stars
2,537
|
4.8 out of 5 stars
4,022
|
4.7 out of 5 stars
1,581
|
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 | |
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Customer Reviews |
4.7 out of 5 stars
293
|
4.6 out of 5 stars
435
|
4.7 out of 5 stars
1,750
|
4.6 out of 5 stars
978
|
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 |
What's in the box
Product guides and documents
Videos
Videos for this product
0:37
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Should you buy the multimeter? My thoughts
✅ Cole Schwartz
Videos for this product
3:49
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Great entry level Klein tools meter mm450
Mechanicallyincleyend
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3:02
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How to check capacitor using Klein Tools MM400
Tools. Electro. DIY
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the performance, quality and value of the electric circuit testing device. For example, they mention it works well, is durable and feels solid. Some appreciate the readability and accuracy. That said, they say it's a reliable tool for the price.
AI-generated from the text of customer reviews
Customers like the performance of the electric circuit testing device. They mention that it works well for their needs, is incredibly useful, and has several functions that aren't found on most meters in this price range. Some appreciate the rubber case and kickstand. Overall, most are satisfied with the performance and functionality of the product.
"...Lastly, this meter is pretty feature-packed, having all the standard gizmos in addition to AC/DC current, frequency, duty cycle, thermocouple..." Read more
"It has everything for an HVAC tech. Capacitance and temperature. I haven't had any issues with it...." Read more
"Unpacked this and put it to use. It worked will, but then I accidentally left it outside and it got rained on...." Read more
"I liked the ruggedness and utility of it. I use it all the time. It stays in my tool bag." Read more
Customers like the quality of the electric circuit testing device. They say it has a great build quality, is durable, and reliable. The meter is sturdy, and the readout is easy to read. Customers also mention that it has nice quality probes, and is easy-to-handle. Overall, customers are satisfied with the quality and functionality of the product.
"...The continuity test is pretty decent, and it has a light and a beeper, which is great in environments where hearing protection is required...." Read more
"...I haven't had any issues with it. It's a very nice digital multimeter.. worth every penny." Read more
"...happy with the Klein MM400, it's small and easy to handle, has nice quality probes and feels solid...." Read more
"I liked the ruggedness and utility of it. I use it all the time. It stays in my tool bag." Read more
Customers appreciate the value of the electric circuit testing device. They say it is a reliable tool for the price, and is worth buying. Customers also mention that the padded zipper case is worth the extra money for the protection it provides.
"...It's a very nice digital multimeter.. worth every penny." Read more
"Good durable multi meter for the home handyman that is affordable." Read more
"Has the features I need at a good price" Read more
"...Great vaule for the money" Read more
Customers find the readability of the electric circuit testing device to be easy. They mention that the backlight is bright and the readout is easy to see. The meter is accurate and easy to use around the house. The back light makes the meter easy to read in the dark, which is a definite plus. Customers also appreciate the simple dial and auto range feature.
"...The readout is clear and crisp, and the backlight works wonderfully...." Read more
"...The simple dial and auto range feature makes it easy to use and the on demand back-light and auto-shutoff to save battery are features I was..." Read more
"FULL OF FEATURES, EASY TO USE." Read more
"...They are too short. This becomes extremely frustrating when trying to attach jumper wires that have alligator clips on the end...." Read more
Customers like the accuracy of the electric circuit testing device. They say it's accurate enough, the probe is accurate, and it'll read the ambient air temperature accurately. Some customers also mention that it'd be a good addition to have a heat sensor and a thermal couple for temperature checking.
"It has everything for an HVAC tech. Capacitance and temperature. I haven't had any issues with it...." Read more
"...The other nice feature on this particular unit is that it has a heat sensor...." Read more
"...This one seams to be as good, it is as accurate, compact, and does everything I need out of a electrical meter...." Read more
"...Mainly, it lacks range, overall accuracy, and true RMS functionality...." Read more
Customers like the backlight of the electric circuit testing device. They say it's useful, bright, and easy to read. Some say the screen lights up to make it easier to read, and some love the light option. Overall, most are satisfied with the back light and beeper functionality of the product.
"...The continuity test is pretty decent, and it has a light and a beeper, which is great in environments where hearing protection is required...." Read more
"...simple dial and auto range feature makes it easy to use and the on demand back-light and auto-shutoff to save battery are features I was looking..." Read more
"...that prevented it from getting 5 stars from me is the backlight will not stay on long enough and the probe ends are too short...." Read more
"...The meter seems sturdy, the backlight is bright and the readout is easy to see." Read more
Customers are mixed about the size of the electric circuit testing device. Some mention that it's compact size allows easy operations in tight locations, while others say that it lacks pockets and is too small.
"...from me is the backlight will not stay on long enough and the probe ends are too short...." Read more
"...I'm really happy with the Klein MM400, it's small and easy to handle, has nice quality probes and feels solid...." Read more
"...And, for the size of the housing, the rotary dial seems too small...." Read more
"...This one seams to be as good, it is as accurate, compact, and does everything I need out of a electrical meter...." Read more
Customers are dissatisfied with the voltage of the electric circuit testing device. They mention that it reads completely wrong, the reading is not consistent, and it wouldn't measure any voltage. Some say that the meter does not measure DC volts and that there is no low voltage or impedance calibration.
"...The one inconvenience is that the unit defaults to AC for and voltage and current measurements...." Read more
"...I'd known before I bought a Klein multimeter is that it defaults to AC in all current and voltage modes, and requires a press of the SEL button to..." Read more
"...but I testing today after got package in , not sure why is NOT read auto range DV volts I try changing see any manual switch from AV to DV there is..." Read more
"...The voltage reading is not consistant (competed against another meter) especially in DC voltage. The ohm reading is not consistant as well...." Read more
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Top reviews from the United States
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First off, this thing is pretty cheap, and I would not recommend it for a professional as a primary meter (obviously), or even the serious DIY'er. Mainly, it lacks range, overall accuracy, and true RMS functionality. However, for the home-gamer, or as a cheap backup to your Fluke, this little guy is pretty great.
The good:
The readout is clear and crisp, and the backlight works wonderfully. The lead wires are supple, and the ends do fit into household outlets once you remove the plastic CAT IV covers (duh). The included K-type thermocouple has a long (over 12-inch) reach, and it agrees to within 1 degree Fahrenheit with my other instrumentation up to about 400 degrees. The continuity test is pretty decent, and it has a light and a beeper, which is great in environments where hearing protection is required. The rubber case that surrounds most of the unit is grippy and seems fairly durable. It says the meter can be dropped up to a meter, which could get confusing, but I think I'll go with the metric interpretation in this case. The stand is pretty awesome as well; it pops out of the back and has rubber feet that effectively hold the meter in a good viewing position on most semi-level surfaces. Lastly, this meter is pretty feature-packed, having all the standard gizmos in addition to AC/DC current, frequency, duty cycle, thermocouple temperature, capacitance, and diode testing. It can do quite a bit, even if it can't do it as well as a $200 meter.
Safety:
This meter features two slow-blow ceramic fuses, which are the industry standard for safety, and will protect you from shrapnel should you accidentally touch the leads to a 1.21-gigawatt power source in continuity mode.
Caveats:
The HOLD function on this meter is a joke; you put the leads on the circuit, press the HOLD button, and the instantaneous reading is frozen in the display for you to read.
Contrast this to Fluke's feature where you push the HOLD button and then hook up the leads and the meter gives you a beep and holds your number on the display once the readings stabilize. Maybe Fluke has a pending patent on this technology - it would be interesting to find out why other companies aren't doing something similar.
Still, is this function worth the extra $150+ to someone who isn't a professional? Probably not.
Next, the continuity/low resistance tester has a small amount of lag in it. That is, you must create a complete circuit for more than about half a second for the unit to beep, indicating low resistance. This may not be an issue for you, but if you find yourself dragging a lead across a set of pins trying to trace a short, you'll quickly find the lag in the continuity indicator to be a bit of, well, a drag. Still, some of the higher-end meters also have this issue, so it definitely isn't a damnable offense for this little guy to be lacking in this area as well. But, it is something you ought to consider before making your purchase.
Overall:
This is a decent little meter that can do 90 percent of the things a DIY'er will ask of it.
I compared accuracy for measurements of voltage, current, capacitance and frequency between the Klein and my older Beckman and the readings were consistent with in a few tenths of a percent between the two. I couldn't verify the resistance accuracy as that's the feature that failed on my old Beckman. I wouldn't choose this basic unit for precise computer or circuitry troubleshooting but for electrician work, auto repair, or even typical home hobby electronics it would be fine.
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Und Superqualität