Extech Ex330 Multimeter Review

Do you need a reliable and versatile multimeter for your electrical projects? If so, you’ll likely be interested in the Extech EX330 Autoranging Mini Multimeter. This feature-filled device is precise and designed to take on various testing tasks. It’s ideal for home DIYers, auto electricians, technicians – anyone who regularly needs to measure voltage levels or test current flow. Read on as we thoroughly explore this invaluable tool’s impressive features and capabilities!

Extech EX330 Review

The Extech EX330 Autoranging Mini Multimeter is the perfect device to have on hand for various tasks. From car wiring to basic electronics, this multimeter offers 0.5% accuracy and non-contact voltage detection in addition to all the standard features like current, resistance, continuity checks, capacitance readings, and frequency testing. The NCV helps you to be more efficient and safe when working on electrical systems, making it a must-have for any electrician.

EX330 multimeter is lightweight and fits easily into most pockets, yet still offers protection with its included rubber holster. The transmitter and receiver also snap together for easy storage. It is UL listed with a Cat III 600V safety rating, so you can be sure you are using the best device for the job. And with the included Type K temperature probe, you can measure more than just voltage and current.

  • Non-contact AC voltage detector (NCV)
  • Measures temperature, frequency, capacitance, etc.
  • Automatic power off.
  • The transmitter and receiver snap together for easy storage.
  • Relative mode readings

Included Item:

  • Extech EX330 Auto-Ranging Mini Multimeter
  • Test leads
  • Tilt stand
  • Impact-resistant rubber holster
  • General purpose Type K bead wire probe
  • Two AAA batteries
  • User manual

Extech EX330 Pros and Cons:


  • Autoranging feature for easy measurement range selection.
  • Compact and portable design for convenient use in tight spaces.
  • Non-Contact Voltage Detector (NCV) enhances safety during testing.
  • Measures various electrical parameters, including temperature, with a Type K probe.
  • Large 4000-count display and data hold function for precise readings.


  • Limited resolution compared to some other multimeters.
  • No backlight, making it challenging to read in low-light conditions.
  • It may lack advanced features for specialized professional applications.


Non-contact voltage detector (NCV)

The NCV feature allows you to detect specific voltages without physically contacting what you’re analyzing. This is a great safety measure as it helps to prevent short circuits and other electrical mishaps.

Max Hold & Data Hold

The Extech EX330 features a Max/Min mode that lets you capture peaks and valleys in your readings, while the Data Hold function lets you freeze reading on display for easy viewing.

Auto power off

The automatic power-off feature ensures that your multimeter has a long battery life. It automatically turns off when it is not in use.

Type K Temperature

The included Type K thermocouple allows you to measure temperature with precision and accuracy.

Auto-ranging feature

The auto-ranging feature lets you easily switch between various measurement ranges without manually adjusting settings. This makes it easier and faster for you to take readings accurately.

Capacitance & Frequency

The Extech EX330 features a capacitance and frequency measurement function, allowing you to accurately measure devices with these components.

Relative Function

This proper function allows you to take measurements relative to a known reference point, making it easier to compare readings without recalibrating constantly.

Large One-Inch Digits

The large one-inch digits make it easier to read the readings on display, even in low light.

Low Battery Indicator

A low battery indicator tells you when your battery is running low on power, and it’s time for a replacement.

UL Tested & Listed

This mini multimeter is UL tested and listed, which ensures it meets the highest safety standards.

Final Note

Finally, the Extech EX330 Multimeter is a solid, accurate choice for anyone looking to measure voltage or other electrical properties. Its design and user-friendly features make it an ideal device for professionals and hobbyists. With its good accuracy tolerances, mains current detection, temperature input, and competitive price point, the Extech EX330 Multimeter is an excellent value for any electrical application. The Extech EX330 is a great choice for anyone interested in electrical measurement and analysis. Whether you’re an experienced electrician, a home DIY enthusiast, or someone just getting into the industry, the Extech EX330 Multimeter always provides reliable results.

Helpful Resources:


Related Posts
How to use a multimeter
How to use a multimeter

Are you a DIYer who wants to learn how to use a multimeter? Are you an electrician needing to brush Read more

What is a Digital Multimeter

Are you a DIY enthusiast or an electrician looking to advance your projects? A digital multimeter is an important tool Read more

What is True RMS

Are you an electrician or DIY enthusiast who needs to understand the basics of True RMS? Well, understanding what it Read more

Clamp Meter VS Multimeter
Clamp Meter Vs Multimeter

Are you looking to do some electrical work around the house? It can be intimidating to tackle a big project, Read more

Leave a Comment