Review on 🔍 Homend WT10A LCD Gaussmeter Tesla Meter: Improved Surface Magnetic Field Tester with NS Function and Metal Probe by Patrick Pearson

I bought this meter primarily to measure the strong fields generated by permanent magnets used in the local college physics lab. I don't have a way to easily verify the accuracy, but the readings are about what I expected. When the sensor is placed between two magnets as shown in the photo, it will read the same in both directions, but when placed against the face of a magnet the reading will be 10% higher in one direction. Since this problem doesn't exist in more uniform fields, it's probably because the field strength decreases very quickly with distance from the magnet and the sensor doesn't have a perfectly symmetrical housing/design. I noticed a mini-USB port on the meter that isn't mentioned in the manual. When I connected it to my PC desktop, I didn't find any functions at all. It will not turn off USB power or charge NiMH batteries when installed in the meter, nor will it show up as a device on the computer. The Check/Measure button doesn't seem to serve any useful purpose. In the validation settings, the display shows 20 or 200. The manual doesn't explain what the validation setting is for, so I think it can be ignored. I measured the meter current draw at around 12mA (this was at negligible field and in the 2T range I think, not sure if the current draw will change much under other settings/conditions I don't think) so should disposable AAs last 200 hours. I am happy with our new Teslameter!