|Item Weight||9.9 ounces|
|Product Dimensions||5.7 x 1.6 x 2.9 inches|
|Item model number||EX330|
|Batteries||2 AAA batteries required. (included)|
|Is Discontinued By Manufacturer||No|
|Size||Autorange Multimeter with Thermometer|
|Color||Orange and green|
|Style||Auto Ranging with Advanced Features|
|Power Source||Battery Powered|
|Item Package Quantity||1|
|Number Of Pieces||1|
|Warranty Description||1 year parts and labor|
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Extech EX330 Autoranging Mini Multimeter with NCV and Type K Temperature
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From the manufacturer
- 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
Ideal for electrical troubleshooting, the EX300 series of Digital Multimeters from Extech Instruments includes two meters in one easy-read, conveniently-sized device: a fully featured digital multimeter and a non-contact voltage (NCV) detector. The EX330 measures DC/AC voltage to 600 volts with a 0.5 percent basic accuracy, along with DC/AC current to 10 amps. This feature-rich digital multimeter measures resistance, performs diode testing and continuity testing, has an easy-read LED display, an audible beeper and red LED indicator, and low battery indicator.
Featuring a big digit 4000-count display, the auto-ranging EX330 offers 12 total functions, including frequency, duty cycle, capacitance, and temperature. A built-in thermometer with Type K probe can switch between Fahrenheit and Celsius readings.
AC Voltage Detector
The built-in, non-contact AC Voltage Detector uses a combination of audible beeper and red LED indicator lights to alert you to the presence of voltage when placed near live wires, outlets, switches and more.
Large One-Inch Digits
The EX330's 2000-count LED display features large 1-inch digits for easy reading even in dark or dimly-lit testing environments
The convenient auto-ranging operation allows you to select the right measurement range when working on a variety of components, from small electronics to main electrical sources.
Max Hold & Data Hold
The Max Hold function allows you to capture the multimeter's highest reading. The display will update each time a higher reading is reached.
The Data Hold function allows you to freeze the current display so you can review and take notes on your current reading.
Auto Power Off
The Auto Power Off function powers down your multimeter after 15 minutes of inactivity to help conserve battery life.
Type K Temperature
The EX330 comes with a built-in thermometer and Type K bead wire probe for temperature measurements. Temperature measurements can be displayed in either Fahrenheit or Celsius.
Capacitance & Frequency
The capacitance option allows you to charge a capacitor with a known current and measure the resulting voltage when performing electrical troubleshooting.
The EX330 measures frequency between 0.001Hz to 10MHz for quick and easy diagnostics when testing circuits.
The relative measurement mode makes measurements relative to a stored reference value so you can compare one stored value with another.
Test an AC wall outlet by inserting a test lead into each slot to measure the line voltage.
Indoor Household Use
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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.
Top reviews from the United States
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I can't say enough good things about it, but I'll try to focus on the highest of the highlights: the NCV button! It's so nice to be able to diagnose so many electrical problems just by holding down a button and gently moving the device along a cable or a wall, listening for the spot where the current stops. And it's a great relief to be able to flip an unlabeled (of course) breaker, press the NCV button, and know if that was the switch for the circuit I'm about to work on.
Say I'm on the outside of a trailer, working on the water heater that's only accessible by removing an exterior wall panel. As described above, I've found the breaker that goes to this circuit. But that was yesterday; did my father-in-law flip it back on in the meantime? I'd better get down off of the ladder, walk around the house, and have the lady who lives here walk me back to the bedroom (awkward) where the breaker box is so I can check it, right? No way! I can just hit the NCV button and find out. (And then, just because I've been stung too many times by "disconnected" electric fences back on the farm, I go ahead and test it with the probes to confirm. But it's good.)
I've also used the NCV function to find faults in power cords on sump pumps, among other things. One little nick in the insulation, it turns out, can corrode an entire length of wire... But I digress.
Another great feature is the... What is it called? The one where you switch it to measure resistance and then toggle the mode a couple of times. Then you touch points with the probes and if they're connected (i.e., sufficiently low resistance), it makes a noise. You don't even have to look at the meter! It's great. I use that all the time to see which points in one place match up to which points in another place. Handy for when wires change colors on the other side of something that would be a pain to move, and the audible signal means I can focus on touching the right points instead of trying to watch the display.
I've used most of the functions at one time or another, but those are the most common ones for me. At work yesterday, I fixed a multi-thousand-dollar refrigerated centrifuge with it by using a combination of the DC voltmeter, ohmmeter, and frequency functions. I've fixed a lot of other things with it, too, but that was all for yesterday.
I'm not an electrician or anything, just a guy who likes to tinker with stuff and works in a laboratory. I really ought to have my boss invest in one of these for the lab so that I won't have to keep carrying mine back and forth from home. I've gotten to the point where I look at it and think, "If I don't take it with me, I'm sure to need it." And it's true.
Despite my enthusiasm for it, there are a few things I would change about it if I could:
1. I would include some leads with alligator clips with it. Come on, those are just too handy not to have. I suppose I can buy them separately, but it would have been nice to include them.
2. I really wish it had some little clips on the side to hold the probes. I have to wrap the wires around it or let them dangle; neither is satisfactory, and both leave you with surprisingly sharp points sticking out. I guess I should invest in a nice rubber band, and maybe something to cap the points. I don't know, like I said, I'm not a professional or anything.
3. The temperature probe is a separate attachment that I almost never have with me, because who wants to carry that, too? I don't know how to fix this, but it would be nice if it could be improved somehow. Also, the cable for the temp probe is really stiff. I don't know how necessary that is for the functionality of it, but if it could be as pliable as the two contact probes (or leads, whatever; I'm an amateur), that would be a step in the right direction. I'm kind of worried about it snapping due to metal fatigue, honestly. It's that stiff.
-Clipping battery connector is fragile, no contacts embedded in case.
-The sensitivity of NCV, even in HI, is poor.
-Microampere shunt is 3000 ohms, it gives very high burden voltage.
-The maximum voltage in DIODE is just 1,55V, so it can not turn on an LED.
-Slow autorrange, specially in ohms.
-Holster is slippery. Meter slips in table when turning knob with one hand.
-You must remove holster to change battery.
-Flimsy tilting bail.
-There is no AWG reference on the cables of the probes.
-The first left position of the selector is not OFF.
-By default, the microampere position is AC, not DC.
-Peak-min-max operates only in ACV
-Beeps when changing function.
-HOLD function is very basic.
-Smart-Hold not convincing.
-Too basic quick-start manual in paper for several models.
It should be given full specifications in paper, not CD.
-Backlight should stay on indefinitely.
-Heatshrinked PTCs and MOVs, also blast shields, give confidence on input protection and CAT ratings.
-Screwed banana-jacks for the probes.
-Continuity is audible and visual for noisy environments.
-Very good viewing angles of LCD.
-Cat IV probes with caps to use them as CAT II.
-Battery cover is held in place with two screws that don't fall.
-REL key is good feature.
-Backlight stays on a long time.
-Very good bargraph.
-VDC and VAC are separated functions.
-Turning force for the knob is high.
-Capacitance goes as high as 10 millifarads.
-Well crafted thermocouple.
-No 10A fuse to blow.
There are photos and video to form your own opinion.
The NCV detector was another selling point for me, but would regularly show no voltage is present when used within 1/2 inch from a powered outlet. When you're working with 120v house wiring, I'd rather have a tester error on the side of my personal safety, THIS ONE DOES NOT.
I decided to exchange the unit since it had all of these issues, which is normally fine. Lemons happen. A day or so after shipping it back, I received my new replacement multimeter. IT HAD ALL OF THE SAME PROBLEMS. I'm very disgusted with Extech's standard of quality. Needless to say, this meter is getting returned as well and I'll be buying something else.
Top reviews from other countries
Update after a month use:
There are two issues below and I decided to return it to buy a Fluke.
- The socket for red lead have poor connection, see the video
- The beeping continuity function works in a weird way, when it detect a closed circuit, it will beep two shorts and and then constantly beep. It always like this. I swap another set of lead in to make sure it isn't about the poor connection. I also put a fresh battery set in but it the problem persists.
UPDATE: After 5 years the rotary switch has become unreliable and the selection changes at random, which I suppose could prove dangerous...
Secondly, it can only read electrolytic caps up to 200uF.
I feel that for the price, these two features should exist/improve.
Quality device but the continuity buzzer could do with being a bit louder. Also gets good reviews on multi-meter websites. Good value for money.