8103 Gauss Meter, Rechargeable Tesla Meter 0-2500mT, Magnetometer with Data Logging and Alarm, Magnetic Field Strength and Pole Tester, ±2% Industrial Accuracy for Quality Control, Labs

This is a very good instrument for the price point. I'm working on a passion project in spintronics. This meter is incredible for under $100.

This seems like a good tool to have around the house, especially when I charge my EV at home. I did a test on my Tesla, when it’s not being charged, bd while it’s charging. The reading did increase while it’s being charged. Especially in the undercarriage area. Which kind of make sense, since all the batteries are located in that area. I am not an expert on using a gauss meter, but nice to have this round to get some readings when needed.

Though I am still learning just how to use and interpret the data, this is a really well built, solid, feature rich measurement device. With my limited experience the measurements seem to line up with what I expect based on what my magnets are rated at.

There are many exciting features included in this meter. It looks to be well coveted already so I’ll just briefly mention my favorites.One, its ability to detect minute changes in the magnetic field near the probe. It can tell polarity as well as its strength, which is nicely plotted on a running scale. I have no way to confirm its precision but I give no reason to doubt its tolerance that’s listed.Two, and oddly enough, it can be used as a device to measure rotation. It counts the number of times the magnetic field changes and can give you a reliable speed or RPM of the device under measure.It comes in a standard carrying case and happily, is rechargeable. You would thing just about anything electronic these days would be but some are not. Fortunately, this is.Anyway, I’m sure there are industrial uses for this but where I see it bringing the most joy would be to that upcoming science major, who can’t get enough physics and electricity in their lives. I would have loved something like this when I was a young nerd instead of an old nerd.

While this meter isn't going to get used every day, when you need it...well, you need it. I was immediately impressed with the build quality and especially the carrying case, which is very robustly designed and offers excellent padding for the meter, probe, and so on. The manual is very well written and readable--at least the English version, anyway! It's also printed in 5 other languages, none of which I'm qualified to read and evaluate.As far as the functioning of the meter goes, it worked very well once I figured out how to position the Hall sensor. It's helpful at identifying the polarity of a magnet, and its accuracy is well within my needs. There's a very interesting mode available where the meter will count RPMs (how often a magnet attached to a wheel passes by the meter) and even more interesting was an additional capability of being able to enter the circumference of the wheel in use and having the meter tell me the speed (in MPH or KPH) that the wheel is turning.All in all this is a great device if you need to measure magnetism.

This is very sensitive and is able to detect weak fields with a hall-effect sensor. I'm having fun seeing which of my magnets is really stronger. I have a kit of engineering toys to demonstrate magnets, big magnets that can crush your hand, so now I have a tool to add to that kit for making actual measurements, how cool is that?I work with a lot of magnets and motors in my hobbies, so having this gauss meter gives me the ability to quantify something I have always had to guess at before. I had a magnetic pointer on a gimble for tracking field orientation, and one of the field viewing sheets, and now I can actually measure and put a number on field strength, how cool is that?!I got the 5% precision model, which is at a sweat spot for value, the other ones are for the people that need their measurements to be traceable for accountability, but for my purposes there is no need to spend the extra money. The build quality is excellent, the probe has a nice protective sheath and you can keep it covered unless you need to get into a smaller location.I will be using this frequently in my use of magnets.

I was immediately impressed when I opened this. It comes in a well-fitted carrying case that almost looks like a small pistol case. The latches on it actually work well, compared to many carrying cases I've received that are a waste of plastic. The padding is shaped exactly for the gauss meter, and there's space for the charging cable and probe. Getting started was a breeze: I just had to rotate the connector until it found the correct orientation, then I pulled back on the release ring, which enabled it to plug in and click into locked position. Turning it on was relatively intuitive, I just held the big button in the middle until it turned on. The only thing I needed to refer to the manual about was the readings. I didn't realize the black plastic unit is the cover over the probe, not the probe itself (I hadn't referred to the photo or manual yet). Once I did, I realized I needed to unscrew and remove it. Then, I zeroed it by holding the zero button until it read about 0. It fluctuates a little around 0 rather than staying locked on 0, but the manual says that's normal. It's very small values, and I'd rather see some activity indicating it's actually working. I tested it on a magnet and saw results immediately, so it's working. I don't have any calibration devices to use as a baseline to compare against, but the readings seemed consistent when the probe is the same distance from the same magnetic field, so that's a good sign. Overall, I'm pleasantly surprised by this little meter.