Slickdeals is community-supported.  We may get paid by brands or deals, including promoted items.
Sorry, this deal has expired. Get notified of deals like this in the future. Add Deal Alert for this Item
Frontpage

Klein Tools MM400 600V Auto-Ranging Digital Multimeter Expired

$35
$81.66
+ Free Shipping
+60 Deal Score
61,132 Views
Home Depot has Klein Tools MM400 600V Auto-Ranging Digital Multimeter on sale for $34.97. Shipping is free.

Thanks to community member jkilez for finding this deal.

Product Details:
  • Multimeter measures up to 600V AC/DC voltage, 10A DC current, 2 MOhms resistance, continuity, batteries, and diodes
  • Lead Alert protection with LED's for test lead placement
  • Easy-to-view backlit display for low light environments
  • Low battery indicator and easily accessible battery and fuse compartment
  • Durable meter built to withstand a 6.6-Foot (2 m) drop
  • Includes test leads, batteries and user manual
  • CAT III 600V safety rating
  • For use in basic and controlled electromagnetic environments such as residential, business and light-industrial locations

Editor's Notes & Price Research

Written by
  • About this deal:
    • This price matches a previous Frontpage Deal that received over +150 thumbs up from our community.
    • See the forum thread for additional discussion of this deal.
  • About this product:
    • This multimeter has received an average rating of 4.7 stars out of 5 based on over 3,200 Amazon customer reviews.
  • About this store:
    • Amazon offers free returns for this item. You can return the item for any reason in new and unused condition: no shipping charges.
    • Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
    • If you're not a student, there's also a free 1-Month Amazon Prime trial available.
No Longer Available:
Amazon has Klein Tools MM400 600V Auto-Ranging Digital Multimeter on sale for $34.97Shipping is free.

Good Deal?

Original Post

Written by
Edited December 27, 2022 at 03:51 PM by
https://www.amazon.com/Multimeter...B018EXZO8M -OOS

This meter has hit this price a few times over the last few months, but nevertheless, this is the lowest non-coupon price.
  • 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

QA note: Now OOS on Amazon. See Frontpage post for other purchasing options.
in Tools (8)
If you purchase something through a post on our site, Slickdeals may get a small share of the sale.
Deal
Score
+60
61,132 Views
$35
$81.66

Community Wiki

Last Edited by Pizzahut December 27, 2022 at 07:56 PM
Same price on amazon for the model linked to in OP: Klein Tools MM325 $34.97 https://www.amazon.com/Klein-Tool...B0B57L9FNL

-- Pizzahut

Your comment cannot be blank.

Featured Comments

Clamp meter cannot test low current in milliamps which is very common in computer electronics.
Googled it and TRMS seems to be useful for measuring modern AC current waveforms, so if you work with AC voltage you probably need that.

Edit: some smarter people corrected me downthread and basically you won't need this unless you really need accurate AC voltage readouts, which you don't most of the time.
To give you some ideas of where TrueRMS is necessary is when the AC output becomes non-sinusoidal.

In laymans terms, non-inverter and things that aren't "true sinewave" outputs. These include:

Generators without an inverter output
Battery generators that you're pushing beyond its rated power (the waveform tends to stop being sinusoidal after its max range)
Bad power quality / poor wiring situations
Output a battery based ac inverter that isn't a "true sine" such as the stuff that connects to your car battery, UPS, etc.

There are many situations where a TrueRMS output is useful for the everyday layman but many laymans and professionals don't know when those occur.

I have a background in power electronics, power quality, and was a utility engineer.

Sign up for a Slickdeals account to remove this ad.

Joined Aug 2018
L7: Teacher
> bubble2 8,747 Posts
1,457 Reputation
Pro
TodayOnly
12-25-2022 at 07:33 AM.
12-25-2022 at 07:33 AM.
does this one have that much-needed RMS
3
3
Like
Funny
>
Helpful
Not helpful
Reply
Joined Nov 2012
L6: Expert
> bubble2 1,954 Posts
1,896 Reputation
Original Poster
jkilez
12-25-2022 at 07:43 AM.
12-25-2022 at 07:43 AM.
Quote from TodayOnly :
does this one have that much-needed RMS
No TrueRMS on this model. For that you would need at least the MM420 which usually sells for about $60.
5
1
Like
Funny
>
Helpful
Not helpful
Reply
Joined Jan 2015
L8: Grand Teacher
> bubble2 3,275 Posts
521 Reputation
Pro
kevinaaa
12-25-2022 at 12:32 PM.
12-25-2022 at 12:32 PM.
There was an additional 10% clip coupon yesterday
Like
Funny
>
Helpful
Not helpful
Reply
Joined May 2018
L4: Apprentice
> bubble2 358 Posts
176 Reputation
tmitim1983
12-25-2022 at 12:33 PM.
12-25-2022 at 12:33 PM.
What is that TrueRMS, and why do we need it? And I never understand, why not just but a clamp meter that can test both amperage and voltage? What does this have in advantage?
11
2
Like
Funny
>
Helpful
Not helpful
Reply
Joined Sep 2017
L4: Apprentice
> bubble2 494 Posts
38 Reputation
Nojistic
12-25-2022 at 12:41 PM.
12-25-2022 at 12:41 PM.
Too much for basic home electric stuff? New to DIY for electrical at home so open to recommendations. TIA
Like
Funny
>
Helpful
Not helpful
Reply
Joined Jan 2007
Natural Bunny Killer
> bubble2 11,739 Posts
MadPup
12-25-2022 at 12:43 PM.
12-25-2022 at 12:43 PM.
The MM600 is $18 at HD B&M if you can find one. It also comes with a case.

https://slickdeals.net/f/16275322
6
1
Like
Funny
>
Helpful
Not helpful
Reply
Last edited by MadPup December 25, 2022 at 12:45 PM.
Joined Jan 2015
L8: Grand Teacher
> bubble2 3,275 Posts
521 Reputation
Pro
kevinaaa
12-25-2022 at 12:43 PM.

Our community has rated this post as helpful. If you agree, why not thank kevinaaa

12-25-2022 at 12:43 PM.
Quote from tmitim1983 :
What is that TrueRMS, and why do we need it? And I never understand, why not just but a clamp meter that can test both amperage and voltage? What does this have in advantage?

Clamp meter cannot test low current in milliamps which is very common in computer electronics.
5
>
4
1
Like
Funny
>
Helpful
Not helpful
Reply
Last edited by kevinaaa December 25, 2022 at 01:16 PM.

Sign up for a Slickdeals account to remove this ad.

Joined Jan 2015
L8: Grand Teacher
> bubble2 3,275 Posts
521 Reputation
Pro
kevinaaa
12-25-2022 at 12:46 PM.
12-25-2022 at 12:46 PM.
Quote from MadPup :
The MM600 is $18 at HD B&M if you can find one. It also comes with a case.

https://slickdeals.net/f/16275322

That's a big if
5
Like
Funny
>
Helpful
Not helpful
Reply
Joined Jan 2009
Head Honcho
> bubble2 133 Posts
89 Reputation
CalamityJoe
12-25-2022 at 01:28 PM.
12-25-2022 at 01:28 PM.
Bought this a few weeks back and the one I received was refurbished. Sent it back.
>
1
Like
Funny
>
Helpful
Not helpful
Reply
Joined May 2007
L7: Teacher
> bubble2 2,045 Posts
427 Reputation
eeagle
12-25-2022 at 01:31 PM.
12-25-2022 at 01:31 PM.
Quote from Nojistic :
Too much for basic home electric stuff? New to DIY for electrical at home so open to recommendations. TIA
KAIWEETS Digital Multimeter TRMS 6000https://www.amazon.com/dp/B07SHLS...ct_details clip the coupon for $20
10
2
Like
Funny
>
Helpful
Not helpful
Reply
Joined Feb 2018
L5: Journeyman
> bubble2 806 Posts
62 Reputation
ThriftyHalibut921
12-25-2022 at 01:38 PM.
12-25-2022 at 01:38 PM.
Quote from eeagle :
KAIWEETS Digital Multimeter TRMS 6000https://www.amazon.com/dp/B07SHLS...ct_details clip the coupon for $20
I got that a couple weeks ago, not bad for $19.32
1
1
Like
Funny
>
Helpful
Not helpful
Reply
Joined Jun 2022
L2: Beginner
> bubble2 50 Posts
10 Reputation
Jchavezjr92
12-25-2022 at 02:15 PM.
12-25-2022 at 02:15 PM.
This good for checking basic voltage?
2
Like
Funny
>
Helpful
Not helpful
Reply
Page 1 of 5
Start the Conversation
 

More Home Depot Deals

More Klein Tools Deals

Link Copied

The link has been copied to the clipboard.