TES10B Digital Tesla Meter Gaussmeter with 0-200mT/0-2000mT Range Auto-Switch | 0~100mT Accuracy ±1%/ 100~2000mT Accuracy ±2% Gauss Meter for DC Magnetic Field Testing | Includes NS Function & Probe

Had to learn the correct way to use it. With the numbers on the probe facing you, and the other side against the magnet it reads the proper polarity. Great tool to determine polarity and strength of various magnets and electromagnets.

Nice portable meter to test magnetic fields. Especially useful for me to compare the strength of different electromagnets. I was more interested in relative measurements than absolute, so I have the less accurate model. Not sure what the one reviewer is saying about "cutting the case to get to the batteries". The green protective cover is a flexible material. If you have trouble getting it off, just warm the unit up a bit and it should come off really easy. The screw for the battery cover is NOT captive though, so pay attention when removing so you don't lose it! All-in-all, I'm happy with the purchase.

I got this to check for magnetized heads on a tape recorder, and it seems to work just fine for that. It's not fancy, and the sensor is a bit fragile- looking but it got the job done. I have no idea if the accuracy is any good, but since I'm only interested in approximate measurements, it's ok for me.

You have to cut the F—-ing cover off to install the batteries.

Good product for the money

Bought this to inspect incoming magnets for strength, not amazing nor a million times accurate but it’s fine for relative measurements to confirm quality

check magnets from magnetic driven clocks

No min max hold. Instructions are completely in Chinese.