GOYOJO Handheld Digital Gauss Meter with Metal Probe & Auto Data Recorder, High-Accuracy Magnetic Tester for Industrial Motors, Permanent Magnets, Medical Equipment, N/S Polarity Detection

Product performed exactly as described

A Reliable and Accurate Handheld Digital Gauss MeterI recently had the opportunity to try out the Handheld Digital Gauss Meter 0-2400mT with Metal Probe, and I must say that I'm impressed with its performance. Although I don't have a reference point to compare its accuracy, the readings it provides seem to be reliable and consistent.The meter's high accuracy of ±5% is a major advantage, providing confidence in the measurements taken. The metal probe is also a great feature, allowing for precise measurements of surface magnetic fields. The automatic/manual data recording function is convenient and easy to use, making it simple to collect and store data.One of the standout features of this gauss meter is its N/S function, which allows for easy identification of the magnetic field's polarity. This feature is particularly useful in applications where understanding the polarity of the magnetic field is crucial.Overall, I'm pleased with the performance of this handheld digital gauss meter. While I don't have a benchmark to compare it against, the readings it provides seem accurate and reliable. If you're in the market for a high-quality gauss meter, I would definitely consider this one.Rating: 4.5/5 starsPros:High accuracy of ±5%Metal probe for precise measurementsAutomatic/manual data recording functionN/S function for easy polarity identificationCompact and portable designCons:No reference point to compare accuracy (although it seems to be accurate)Recommendation:I would recommend this handheld digital gauss meter to anyone in need of a reliable and accurate tool for measuring surface magnetic fields. Its high accuracy, convenient features, and compact design make it an excellent choice for a variety of applications.

A plastic storage case and probe with cover. 9v battery. Very small font in instructions

All the features are intuitive and work well, I look forward to testing it out in the field and do hope it performs to expectations.Just wish they would have included a chart for all the different readings.

Did not work. Would not stay at zero and slowly crept upwards. Would read a value in open space.

I misunderstood what this meter actually measured. I was expecting it to tell me how strong the magnetic pull was of the entire magnet. That's not what it does. Rather it measures what I think of as a density function, how strong the magnetic field is.Look at the photos measuring two neodymium magnets. The large one is a so-called fishing magnet and will hold many pounds of weight. The small one is just a small accessory magnet I use to keep papers and whatnot in place on my whiteboard. Yet the small magnet actually has a higher measurement (378.1 mT) than the fishing magnet (364.3 mT).My mistake was not understanding that the gauss/Tesla units are based on surface area, per square centimeter. So to compute the overall magnet's strength, multiple the reading from this meter by the surface area.I did measure a couple of regular magnets and they were in the 60-70 mT range.Looking at the product photos on product page it's not clear to me whether I should be using the sensor from inside the plastic housing, or taken out as I did.

I make electric motor kits for school STEM classes. I use permanent magnets for some models and field windings for others, depending upon what the teacher wishes to convey to the students.My designs all worked great, but were a bit hit and miss with the permanent magnets as I did not know the gauss rating. So I got this meter to roughly check the gauss rating for the permanent magnets and was then able to better balance the field coil gauss rating for my armatures, Turned out they only need 3 layers of windings, not 4 to balance the permanent magnet field.Each batch of magnets is a little different. They are supposed to be a certain size, but the different manufacturers cheat and make them a tad smaller. Very annoying.The gauss meter has allowed me to refine my designs and save a lot of copper magnet wire that was redundant.

Out-of-box experience with this wasn't great - when I first turned it on (after inserting the included battery), the battery indicator went from 3 bars to 2 bars in a few seconds, then to 1 bar after 10 or 20 more seconds, then to no bars at all within the first minute or two.But the unit did NOT shut down, and the next time I powered it up, it dropped to two bars of battery and stayed there. The included battery was a cheap not-even-alkaline unit, so it may do better with an alkaline battery (or, better still, lithium) -- but this is NOT the way to make a good first impression on customers.Be all that as it may, the unit gives plausible readings, I think. I tried it with several magnets salvaged from old hard drives, and it gave readings from 300 mT to 800 mT. I had expected this to detect Earth's magnetic field when properly oriented, but it's not quite sensitive enough to do that. (That means it's less sensitive than a DC current clamp meter I have, which DOES easily detect Earth's field.)Another concern I have about this meter is that when you remove the plastic cover from the probe (which you're supposed to do), the board with the Hall sensor is directly exposed, as are the metal legs of the sensor itself. It seems like they could have at LEAST put a coating of epoxy or silicone on the end for protection. I expect this probe will fail due to damage long before the rest of the unit wears out.I'm hesitant to deduct more than one star, because this is the first dedicated magnetic field strength meter I've used, and there may be good reasons for these issues. But I'm not left with a great feeling about the unit's durability or battery life, and that makes it hard for me to recommend this.