Extech EX330 Multimeter Full Review

Extech Ex330
  • 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

Extech Ex330 Overview

On to our next product in the budget multimeter category, we have the Extech Ex330. Extech are well known for producing multimeters that are both versatile and durable, two key components for any good multimeter.

Another key element with Extech is that they cater not only to professionals but newcomers and those who simply wish to conduct some DIY work. With the Ex330, they’ve created a model that has a staggering 12 functions in total.

We’ll be exploring more about this shortly, and to get a complete picture of this product, we will firstly begin with an overview, detailing what the item is. This will be followed by the key features, before moving on to our pros and cons. We’ll also take a look at what other users found when buying the product before giving our final verdict.

Extech Ex330 Review

You’re probably keen to know what the 12 functions we mentioned above entail. To give you an idea, it has AC/DC and voltage, capacitance, resistance, temperature, frequency, and pulse radio.

This is combined with an easy to read and big screen, which is a huge plus for a model in this category as often, the screens are too small, and the data becomes unreadable. What is also impressive is how simple this multimeter is to use.  The multiple functions offer the ability to troubleshoot and repair a whole host of problems such as home computers and cameras.

Due to these extensive features, it also appeals to professionals as well as newcomers. Its intuitive design means that even someone new to this world can pick it up and get going in short time. So without hesitation, let’s get a deeper look into the multiple features this product has.


Well priced at $52.93 (on Amazon.com) you would assume there wouldn’t be as many features as there are. By now you’ve picked up that one of the main selling points of this product is the fact it has so many options to help it stand out from the crowd, so let’s break these down.

  • Built-in non-contact AC voltage detector (NCV)
  • 4000 count auto-ranging 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
  • Data Hold
  • Low Battery Indicator
  • Auto Power-Off
  • Lightweight and compact


To expand further, here are some quick-fire functions to be analyzed.

1. Temperature Sensor

Commonplace amongst high-end multimeters, it would normally not be something to highlight. However, in the categories of the best home multimeter and best cheap multimeter, it’s somewhat of an anomaly, in a good way.

In line with the rest of the model, measuring temperature is a simple process. Simply select the temperature mode, and without anything being plugged into the multimeter, you will see the room temperature appear.

2. Multiple Attachments

A great feature here is the ability for the device to have plenty of attachments. This includes things such as test instruments and accessory heads being easily adopted and fixed to the unit.

Saving on space and the number of tools you need to carry around with you, it’s another well thought out design element.

3. Low Battery Indicator

Another feature that probably seems insignificant on its own, but when you add it all into the mix, it creates a great product that ticks a lot of boxes.

It’s another simple idea and execution; many people forget to buy or replace batteries, particularly when no visual reminder is given. Just like your smartphone, you pay attention to the battery meter displayed on the screen, and it’s the same concept here. Keep an eye on it and replace as required.

Pros & Cons

As you can see, the multiple features present with this multimeter make it a very attractive prospect. The great diversity and usability of all of these components make it a great unit to buy and certainly one that we like.

When you collect together all of the things it can do and look at the price, it’s outstanding. One of the best things about this is the screen. However, despite its large size and easily interpreted data, it still lacks a backlight, which can irritate certain conditions.

Ease of use for the product, in general, is a massive plus point as it appeals to DIY occasional users as well as the everyday professional. One downside, however, is that the metal tips on the test leads are quite short and longer tips would solve the situation a lot more efficiently. Here’s how we break down the good and the bad.

  • Priced well
  • Easy to use
  • Many great features and functions
  • Durable
  • Test leads have short tips
  • No backlight on the screen

User Reviews:

As you may expect, user experiences, on the whole, are positive, but there were negative reviews as well.

But first, let’s look at a positive review, which is as follows; “Just out of the box you can already tell this thing is built solid. I tested all the features of this tester, and so far they suit my needs. The contactless voltage sensor makes you feel like a Ghostbuster!”

This points to the fact that anyone can pick up the unit and get going with what they need to do, which is something we agreed with. However, there are a few reviews where people didn’t get their test leads or temperature probe.

One such example said the following, ” The meter seems good, like new in fact, but I am missing my Type K Thermocouple probes.”

By contrast, though, another positive review gushed, ” I have had this meter fit several months now. It is well built and has handled all expected bumps and falls. The accuracy is better than expected. I work on scales and load cells for my job, so I have a fluke meter that was over $500 – I bought this meter in one day fur a side to side comparison. The results were that this ex-tech meter matched the flukes readings very closely.”


This is a well thought out, multi-use and multipurpose multimeter. Ticking plenty of boxes and performing well in most areas, there’s a lot to like about it.

Being user-friendly and intuitive goes a long way to making a product like this a joy or a burden to bear and this falls into the former. A veteran can pick this up and use it well, as we saw with the last user review and then a relative newcomer (the first review) can also get everything they need out of it.

However, one downside to note that occurred a few times is in relation to the quality of the company, not the product. To specify, a lot of people didn’t get the test leads and the temperature probe even though the description clearly states they’re included.

Sadly, the only thing you can do is return the product and wait for a new one. We would still recommend this product though, as it’s fairly priced and comes packed with features that will make your job easier.

Should you be looking for something a little different, be it more specialized or more in your budget range, be sure to check out our multiple other reviews on Santa’s Reviews, as you will surly find what you need!

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