3300 Hands-Free Digital Multimeter Black

I'm an engineer with access to a high-precision certified calibrator and decided to evaluate the Innova 3300a. It is one of thinnest, smallest, flat form-factor Volt-Ohm meters available. It easily fits into a shirt pocket (see picture). There is no case or cover over the display. The probes are permanently attached, but the connection seems sheltered by the wrap-around cable storage channels with probe clips. The probe tips have removable protectors for crowded test points. (See Picture) Also, it is easy to unfurl one lead and use the other while still stowed away snapped to the meter; or one can use both leads while the meter is held to your wrist by elastic bands. So, overall my first impression is that it is an improved design for a small volt-ohm meter. But, is it accurate? My old mini-meters are more guesstimate devices than measuring tools. The meter functions are Volts (AC & DC) and Ohms with the related diode (Applied voltage below 1.000 VDC) and continuity functions (beeps when resistance is below 60 Ohms). There are no functions for Amps, frequency, min/max, duty cycle, temperature, battery check, or anything else; just Volts and Ohms. However, Volts and ohms solves an amazing number of problems when troubleshooting. (And you could use a tiny amp probe or a shunt for amps if really needed.) The 3300a is low priced, with specifications typical of low-priced meters. I didn't expect much. However, it also is far more accurate than advertised. The specifications are a basic DC accuracy of 0.8% of Reading plus 5 least significant digits or counts (0.8% rdg + 5 cnts). I tested every range (200mV, 2V, 20V, 200V, & 600 VDC) at 10% and 95% of range. The worst DC error I observed was 0.3 mV at 190mV (that's 3 counts or 0.16%). ALL of the other DC test points were off by 1 count or less! (See pics at 12V and 1.5 V, common battery voltages) I tested in a similar fashion every Volts AC range at 50 & 60 Hz. Volts AC had more error than Volts DC, but none observed more than 7 counts with 120.0 VAC indicating 120.3 (3 counts) and 240 VAC indicating 238 VAC (no decimal place, so 2 counts error). There was no difference in measurements observed between 50 & 60 Hz. Resistance measured 3 counts high near the max of each range and better closer to 10% of range. The specification is (1% rdg + 5 cnt) but the actual performance was about (0.1%rdg + 1 cnt). The diode function seemed to have a bit more error than DCV, but was well within specification. (See Picture of 0.900000 V feed.) In summary, this is a delightful find - Inexpensive, well built, accurate, easy to carry and easy to use. I am ordering 3 more as gifts, and one for my desk. Disclaimer: I bought and paid for this myself. All statements are my observations and my opinions about the model 3300a, Lot number 220701 delivered to me - yours may be different. I have no relationship with the manufacturer, seller, or Amazon other than that of end user & customer.

This is a good choice if you're looking for a decent performing multimeter for a low price. No, you won't get the accuracy and durability of a Fluke, but it is much better than the other low-priced multimeters I've tried. Voltage and resistance readings are very accurate when checked using a high-end meter, and the probes are of better than usual quality for this price point. It also has a clear, easy to read display, probe holders, and an elastic band on the back for ease of use. I debated getting this or the next model up (3310) but found, after reading the specs on the Equus site, that the accuracy is the same for both. The 3310 does add some features, such as a continuity tone, but since I didn't need those, I went with the lower-priced 3300. The only significant complaint is the tough to open clamshell packaging. Hate that! It's a good choice for general homeowner usage, and better than the typical cheap multimeters out there. Highly recommend.

I really like this little device, price considered of course. I wouldn't expect it to be as dead-accurate as pricier models, so for true contractors/electricians/repairmen, this is at best a backup unit, but for the average homeowner this is a pretty nice little device. I've used it to check Ohms on speakers (they did fluctuate so I doubt it was completely accurate, but gave a general guideline at least), as well as to test for which line is "hot" while replacing a lightswitch with a timer lightswitch for our exterior lights. Our lightswitches use the two-blacks and a neutral, so it's important to identify which black is hot so the item isn't damaged (and also for safety to ensure the correct circuit is off). So, for the homeowner who's looking to do some mundane testing, making sure electrical lines are safely off, those sorts of things, this device seems very solidly built, and while perhaps not accurate for precise measurements, seems accurate enough for many uses (our AC line read at 122 volts for example). Also, the instructions aren't clear on how to use the device, but basically you use the red prod to connect to hot for testing, and the black to connect to ground or neutral (in case, like me, you don't know the basics of how to use a multimeter); for standard outlet AC testing, just turn the dial to 200 on the AC voltage setting. You can also watch some instructional videos on YouTube. The display is very clear and powers on instantly; it uses a 9v battery so it should last for a while. All in all, I like the device, it was very affordable and works well for my purposes. And of course, always be safe when working with electrical!

Ordered this to have an extra and it works perfectly. It stays in a hot vehicle during the summer heat and still performs like it should.

First off, I'm reviewing the INNOVA 3300. This is a manual-ranging multimeter with detachable probes that uses a 9V battery and does not have a continuity beep. Amazon is now showing pictures of the 3300A under the same product listing from which I originally ordered. The 3300A is an auto-ranging meter whose existence the INNOVA website doesn't even seem to acknowledge. The 3300A has permanently attached probes, a continuity beeper, and apparently uses two little alkaline button cell batteries (which I imagine would need changing more often, but I don't have direct experience with it). The 3300A also eliminates the battery-test modes which allow you to make sure the voltage you read on a battery is a voltage it can actually supply under at least a little bit load, and doesn’t measure current. I don't like it when multiple products are sold under the same Amazon listing like this. It makes it difficult to tell whether the reviews you're reading have any bearing on the product you'll actually receive. And I can offer no insight into which version of the product you'll receive if you place a purchase right now. I have the 3300 manual-ranging meter. I originally bought this multimeter for less than ten dollars in late 2013, for use on a relatively simple low-voltage DC electronics project that I was working on. It served me fine for that purpose. My only real complaint was that upon opening it up I found that one of the wires leading to the battery had been smashed between the housing and the circuit board when it was originally assembled, damaging the insulation. I put some electrical tape over it, but the meter seemed to be working fine, so I gave it a four-star rating here. In the following years I used it for general purposes that consisted mostly of checking voltages on batteries and power supplies to see if they were working. Occasionally checking for continuity to try to figure out how something works. It mostly performed fine, and the lack of a beep associated with the continuity test was the only feature I particularly found myself missing. Over time, though, the 20V DC range started acting funny, reading as much as 7V when the probes weren't touching anything. This forced me to use the 200V range, which was disappointing and cost me some resolution, although in truth I was never doing anything where a small fraction of a volt would make much difference. When changing the battery didn't fix the problem, I revised my rating from four stars to three. (I will also note that any multimeter should have a fuse inside it--that's another thing to check if it starts acting funny.) Eventually, however, I disassembled the entire unit and found yellow plastic shavings collecting mostly on the front of circuit board at the center of the rotary dial. I assume these shavings, shown in the attached picture, were gradually worn off the casing little by little each time I rotated that dial. Eventually, enough of them must have built up to affect the quality of the electrical contact, because after I cleared out those shavings my 20 V DC range was working properly again. This doesn't exactly speak highly of INNOVA's build quality, but it was a really cheap meter. (Although the current 3300A is not as cheap as the 3300 was.) I tested it against a Fluke 117 that I recently bought, and got similar readings from an old 9V battery that I had lying around (Also shown in an attached picture). So my INNOVA appears to be back in fighting shape for now. This leaves me with a bit of a conundrum. Is it a four-star meter again, given that the problem was fixable? Or is it a three-star meter because of the poor material quality that allowed this problem to occur in the first place? I'd probably give my 3300 it 3.5 stars if I could. But because you don't know if you'll receive a 3300 or 3300A, and because the 3300A strikes me as being a little bit cheaper in construction from what I've seen in an online disassembly video, I've decided to stick with three stars. When it was half the price of the 3320, it perhaps merited consideration for extremely low budget projects. But given current prices, you're probably better off paying five dollars more for the 3320. Now, any discussion of multimeters probably merits a little context. This is a cheap meter that's fine for doing low-consequence, low-voltage DC electronics work, but is probably not the safest thing to be using if you're operating on 120V or higher mains electrical items. I'll admit, back when this was the only meter I had, I used it a couple times to check a 120V outlet without any mishaps, but these cheap meters just don't have the input protection of more expensive meters in case something goes wrong. And some fairly dangerous things can happen in the event of operator error and/or unexpected surges. You'll see twenty-dollar meters with four-star ratings, and you'll see two-hundred-dollar meters with four-star ratings. The people rating those products are using them for different purposes. Please make sure that the tool you're using is appropriate to the job you're doing. The "Cat" rating will give you some indication of how much abuse a meter can take, but some shady manufacturers have been known to exaggerate their ratings, so use some common sense. And if you do need to poke around in the vicinity of mains electricity then (1) this meter is not the right one for the job, and (2) get yourself a non-contact voltage detector so you're not guessing as to whether a wire is live or not.

This is nice. It’s small enough to fit in my drawer. Great value for the money. Tests great and works well.

Pretty useless on all functions. The readings start high then keep dropping. Like, for a 1.5 v battery, it starts at 1.9v then maybe 30 seconds later it's down at 1.4v and still dropping. So it never really gives a reading at all. All over the map on a car battery. Impedence readings are a joke. Threw it out and got a Klein which is more but does give a solid usable reading.

Great working product. Easy to read and use. Very accurate. Item as described.

I only need it to do simple tests and I love it. No complicated menu and the straps are handy

Was looking for a simple but feature-full multimeter to have for the garage. Purchased this one, and am very happy with it. I only wish the prongs were slightly longer, however that's easy enough to modify if I ever get around to it.

المنتج سئ جدأ لايعمل بشكل جيد خسارة الفلوس على فاضي

Excellent pour électricité fusibles auto batteries AA AAA C D 9volts

Does what it's suppose to do. Very good for newbie DIYers like myself