General Tools 400 Amp AC/DC Auto Ranging Clamp Meter with True RMS-DAMP68 at The Home Depot
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General Tools

Model # DAMP68

Internet # 204379889

400 Amp AC/DC Auto Ranging Clamp Meter with True RMS

General Tools 400 Amp AC/DC Auto Ranging Clamp Meter with True RMS

This item has been discontinued.
The Home Depot no longer carries this specific product.

$99.99 / each
Item cannot be shipped to the following state(s): GU,PR,VI


In Stock



Model # DAMP68

Internet # 204379889

Since 1910, General Tools has grown to become the recognized industry leader for specialty hand tools and instruments. The DAMP68 is a versatile, auto-ranging AC/DC True RMS Clamp Meter. It can tackle most residential and commercial electrical system installation and troubleshooting. Lightweight and hand-held with 11 functions and 34 ranges, it can be used by professional contractors and do-it-yourselfers.

  • Measures AC/DC voltage, AC/DC current, resistance, capacitance and frequency
  • Also measures temperature with included "K" type thermocouple
  • Jumbo 3-3/4 digit (4000 count) backlit LCD + analog bar graph
  • Hall effect clamp jaw
  • Auto ranging or manual ranging

Info & Guides

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Assembled Depth (in.)  11.38 in  Assembled Height (in.)  2.75 in 
Assembled Width (in.)  6.25 in  Electrical Product Type  Tool 
Electrical Tool Type  Specialty Tool  Manufacturer Warranty  1 Year 
Returnable  90-Day 


Rated 3.7 out of 5 by 6 reviewers.
Rated 5 out of 5 by Accurate meter This handy meter is quite accurate. I tested current, frequency, temperature and voltage and all were spot on accurate. The clamp is handy on electrical panels or exposed wire. It also has an auto shutoff feature if you're like me and always forget to switch it off after you finish measuring. October 26, 2013
Rated 2 out of 5 by Underwhelming The user manual is for two different models, making many paragraphs difficult to read since each place where the models differ contains different text for the two models. Saving printing costs at the expense of consumability is not good for the consumer. Lead wires are way too short to use the meter in many circumstances. (Anything more than 18" from the meter.) Often the meter ends up hanging by the test leads because they are too short. The switch selector has too few settings, so one has to use the shift button in conjunction with the mode selector to select the desired mode. This makes the interface more difficult to use and one needs good eyes to see the tiny mode indicator on the screen. Frequency measurement is a main setting yet switching between AC and DC current readings needs the shift key! It seems to be designed to be economically engineered rather than for ease of use. The batteries that came with it lasted just a few minutes. They are just a waste of shipping. The audible tone for circuit continuity is very soft, almost impossible to hear where fans are running or there is any background noise. Continuity testing is one of the most important functions of a multimeter and the I find the audio confirmation a critical aspect of that. Unit weight and surface feel fine. I compared the amperage reading of some DC current against a Sears multimeter. The DAMP68 measured .9A and the Sears read 1.2 A. I am not sure which is correct. I placed the temperature probe in a hot tub and the reading agreed with the tub thermometer. I held the probe on a wood stove which had a thermometer reading over 400°F and the DAMP68 suggested the temperature was 316°F. Overall I did not find any of the features great, I would only recommend this if you really need a clamp meter for measuring current, otherwise just get a regular digital multimeter. November 11, 2013
Rated 4 out of 5 by Easy to read and handy carrying case inductive DC amps reading is my main usage. True RMS reading.Fast friendly shipping and pickup at my store. January 14, 2014
Rated 4 out of 5 by Descent General purpose meter General: Found this to be a descent, general purpose meter. Nothing over the top special about it, but not a piece of junk either. Without going into all the specifications of the meter, which you will find online already, it performs within its specifications. When tested against highly calibrated equipment in my lab, I found that the meter posted results within its +/- % making it useable for most applications. The meter includes a carrying pouch, set of probes and a Type K thermocouple temperature probe rated for -40 to 752° F. The "feel" of the meter: Didn't have that robust, sturdy feeling that I get with other meters I own. Has a "plastic" feel to it that I had a hard time getting past with my observation & opinions of the item. Granted the price point of the item, it is well worth it's cost for the general DIY or homeowner .... which, in my opinion, EVERYONE should own one and be able to understand how to use it. USES: A/C voltages up to 600V Most homeowners will use it for 110/220v D/C Voltages up to 600V Most users will test loads between 12-36v for auto & boat use. Having a clamp-on meter is worth is weight in gold for anyone trying to troubleshoot loads without having to remove wires from panels. Clamp the meter around 1 lead & check voltages. The RMS: My only real dislike is the "settling time" this meter took. When I test a load, it takes about 5 seconds for the meter to "settle" on the voltage, amperage, etc... Most comparable meters I use reach the true number almost instantaneous. Safety First: Practice safety. Never attemt to test hot electrical current/wires if you are uncertain what you are doing or how to properly do it. Refer to the manual as needed! Once you understand how to use this meter, you can troubleshoot most electrical issues around the home, shop, car or boat! October 28, 2013
Rated 4 out of 5 by Good full-featured multimeter This was a pretty good multimeter with lots of features. In addition to the standard measurements, I especially appreciated its ability to measure capacitance and temperature. I had no problems with its performance or accuracy. It came with a nice carrying case too. The quality and design seemed to be okay but could have been better. The tone on the continuity tester should be louder and the wire leads should be longer. Also, the display screen was warped at the edges causing a lot of glare and making it hard to read without activating the backlight all the time. Overall, I was mostly happy with this solid and full-featured multimeter. February 5, 2014
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