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Extech EX330 Autoranging Mini Multimeter with Built In Thermometer with Type K Remote Probe

4.2 out of 5 stars 232 customer reviews
| 32 answered questions

List Price: $59.99
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Auto Ranging with Advanced Features
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  • Built-in non-contact AC voltage detector (NCV)
  • 4000 count autoranging multimeter measures AC/DC voltage and current, resistance, frequency, duty cycle and temperature
  • Cat III - 600V UL listed
  • Includes Type K temperature probe
  • Rubber holster protects meter
25 new from $53.99 6 used from $34.30

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Frequently Bought Together

  • Extech EX330 Autoranging Mini Multimeter with Built In Thermometer with Type K Remote Probe
  • +
  • Extech TL809 Electronic Test Lead Kit
  • +
  • Elenco TL-6 Alligator Lead Set, 10-Piece, 14 inches
Total price: $73.52
Buy the selected items together

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Style: Auto Ranging with Advanced Features
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Technical Details

Style: Auto Ranging with Advanced Features
  • Portable

Product Description

Style: Auto Ranging with Advanced Features

Product Description

Extech EX330 Autoranging Mini Multimeter with Built In Thermometer with Type ...

From the Manufacturer

Compact autoranging multimeter features extra large 4000 count display and built-in non-contact AC voltage detector. Advanced function include Frequency, Duty Cycle, Capacitance and Temperature. Diode test and continuity. Rubber holster protects meter. UL listed Cat III - 600V. Includes test leads, Type K temperature probe, two AA batteries and tilt stand.

Product Information

Style:Auto Ranging with Advanced Features

Technical Details

Part Number EX330
Item Weight 1.1 pounds
Product Dimensions 5.7 x 1.6 x 2.9 inches
Item model number EX330
Batteries 2 AAA batteries required. (included)
Color orange and green
Style Auto Ranging with Advanced Features
Item Package Quantity 1
Number Of Pieces 1
Special Features Portable
Batteries Included? Yes
Batteries Required? Yes
Warranty Description 1 year parts and labor

Technical Specification

Additional Information

ASIN B000EX0AE4
Customer Reviews
4.2 out of 5 stars 232 customer reviews

4.2 out of 5 stars
Best Sellers Rank #10,686 in Home Improvements (See top 100)
#16 in Automotive > Tools & Equipment > Diagnostic & Test Tools > Multimeters & Analyzers
#18 in Home Improvement > Electrical > Testers > Voltage Testers
Shipping Weight 1.1 pounds (View shipping rates and policies)
Date First Available March 8, 2006

Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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From the Manufacturer

Testing Outlets

Test an AC wall outlet by inserting a test lead into each slot to measure the line voltage.

Testing Outlets

Testing Appliances

Indoor Household Use


Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Style Name: Auto Ranging with Advanced Features
I've had this meter for a bit over a year now and am very happy with it. It has a good number of features along with the temperature probe which is a nice bonus. Have used on quite a bit of items. House, Auto, Computers, even some standard batteries that got mixed up. Only reason I didn't give this meter 5-stars is because it didn't come with any alligator clips. As a couple others commented, the meter does fluctuate and skip around a bit using the normal straight contact tipped wires until you get your hand steady and have it on good contact sites. However this is due from just getting a good connection not really the meter itself. I highly suggest buying a set of alligator clips if you have this or plan to buy this multimeter. It totally solved / stopped the contact issues and I get a fast solid reading every time I use it using the alligator clips. Yes Fluke brand multimeter's are considered the best ones out there. Also the most expensive, so save 2-3x your money and be more then satisfied with this unit.

edit: I just wanted to add in, I should of gave it 5-stars originally. Was 4 stars, added a proper 5th star. Alligator clips would of been nice, but lack of didn't deserve a star reduced. Alligator clips are not always included. If your using the standard probe tips just make sure your contact spot(s) are cleaned well and maintain a steady hand. Or again use some kind of clamps or clips, you can buy them for a few dollars here. Once the probe has made good contact for second or 2 with no movement it has never failed me and given a good read out. I didn't re-edit my original post just added this as I felt it was needed.
8 Comments 44 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Style Name: Auto Ranging with Advanced Features Verified Purchase
Just got it today so can't testify to its longevity. I gave it 5 stars as I do all products that do what they are advertised to do. So far I have checked every function with the exception of capacitance. They all worked and the readouts were as expected and seem to be well within the product's specs for accuracy.

The no contact voltage detection worked at all places where there was voltage but if the meter couldn't get close enough to the conductor the buzzer and light were a bit anemic but they did react.

The temp probe isn't much of a "probe", There is just a sensor at the of the wire. It does work though and gave accurate readings in both F and C.

Hz and duty cycle registered 60Hz and 50% on household utility power.

I didn't like the fact that the batteries were already installed, hope they are fresh but will probably replace them if I need the meter for anything important.

The auto-ranging feature is great and will probably save me and many others from operator head-space disasters.

Not a complaint since the product wasn't described as having a back-lit display but sure would be nice if it did. I am somewhat mystified as to why manufacturers don't just go ahead and stick in an LED.

This has been mentioned before in other reviews but if you buy this product before you send it back or to the trash can for the "OL" problem make sure the leads are fully inserted into their respective receptacles. When fully seated the terminals will be flush with the meter case and won't go any further into the mete. There was significant resistance the first time I inserted the leads into the meter and I did get the "OL" greeting until I fully seated the leads.
2 Comments 17 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Style Name: Auto Ranging with Advanced Features Verified Purchase
I haven't tested this device much but in general it looks fine to me. Though, I was tempting to remove one star for the poor product advertisement. The description says "The EX330 measures DC/AC voltage to 600 volts with a 0.5 percent basic accuracy" which may make you believe this accuracy is for any mode and any range. It's not truth. 0.5% basic accuracy applies only to DC range 400mV. Other modes/ranges have worse accuracy. Attached is an accuracy table from the manual.
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The manufacturer commented on the review below
Style Name: Auto Ranging with Advanced Features Verified Purchase
I am a Bench Tech, and wanted a small auto-ranging Meter for checking Resistances and Capacitance's of discreet electronics components. Resistances, it does well. It is reasonably accurate, compared to my other Bench Meters. But, for checking Capacitance's, it fails miserably. For very small value Electrolytic's, it gets close to the printed values. For Larger Electrolytic's like 47uf and larger, it can't get an accurate reading. With Disk Caps, it can't lock in on a value. Not even close to the correct range. Over 50 bucks for this dog, and it can't read Capacitances. The Range button has no effect in the auto-range mode, and Capacitances appear to only be permitted to be detected in the auto-range mode. The display reads PF values for what I know are UF Caps. I read the other reviews before buying, and thought I was getting a GREAT Meter. But nobody even mentions their experience with the Capacitance feature on various Caps. They just boast about the "Available" features, not true experiences. You can do much better than this model for half the price.
3 Comments 22 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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The manufacturer commented on this review(What's this?)
Hello Buyer Bob,
My name is Jamie Cohen and I am the Product Support Manager at Extech. Thank you for your detailed feedback. I am sorry the Capacitor function on the EX330 was not functioning as expected. I would be happy to help arrange a tested replacement for you. If you would like to pursue this, please email me at feedback@extech.com.

Best Regards,
Jamie Cohen
Product Support Manager
Extech Instruments
The manufacturer commented on the review below
Style Name: Auto Ranging with Advanced Features Verified Purchase
I tried my best to like this thing but about 25% of the time I could not get it to work or work properly. About the only thing I really like that I think is done very well is the display. The AC sensor also works ok and is a nice feature to have sometimes. The temperature sensor wasn't even close so I'm glad I didn't need it. When it did work I thought it was very slow and I was comparing it to a $5 unit I have had for 5 years. I finally warmed up to the price of a near new Fluke 87v and I'm glad I did.
3 Comments 4 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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The manufacturer commented on this review(What's this?)
Hello J. Lambert,
Than you for your review of the EX330. I am sorry that the unit you received was defective. This is not the product experience Extech wants for our customers. My apologies for the frustration you must have experienced. While I see you have ordered a competitor's unit, I would be happy to arrange a tested replacement for you. If you would like to pursue this, you can email me at feedback@extech.com. I would be happy to make the necessary arrangements.

Best Regards,
Jamie Cohen
Product Support Manager
Extech Instruments

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