Tunkia TD8620 Gauss Meter

[joeqsmith]

I was in the need of a gauss meter and  bought one of these cheap Tunkia.  I've had it for a while now and no real issues.   Searching the forum, there's not a lot of info about it.  I suspect the one I have is 5% but I really have no wave to verify it.   I had ordered some magnets and the meter seems to read in the ballpark of what I expect.   May be a good solution if you are looking for something on the low end.   

https://www.tunkia.cn/TD8620-Handheld-Digital-Gauss-Meter-Tesla-Meter-pd783443888.html


https://www.eevblog.com/forum/testgear/gauss-meter-(0-2tesla)-lt$150/msg3962993/#msg3962993

[DaneLaw]

Was also in the market for a cheap Gauss/Tesla Meter a few years back..  there was a handful of "different" cheap models, but I was left with the impression it was mostly the casing that differed across them
They all came in 3 different tolerances 5%, 2%, and 1% - the UI & features were quite aligned.
One of the things I needed, was a running peak, but they all seem to manage that.
I went for this one below mainly because of the price, it seems to behave.. though I don't have reference-gear to question the readings it delivers, but they do seem consistent, and fall in line with what I expect.

It's a 5% model that went for a tad under 50$ at a sale. (incl. 25% EUVAT & delivery) with hall sensor-probe & casing, so it can't be a lot that is left to build the product with.
It's 5% rated in some of the range and 2% in the rest, while the more expensive 2% class, got 2% throughout the full range, and the same with the 1%.
Checked the manual on this 5% unit that indicates a measurement range from 0 to 2500mT.. its 2% from 0 to 1000mT and 5% from 1000mT to 2000mT
Bottom of the barrel from China will have to do for now, - I certainly don't have a need to wallet out for a LakeShore F71 multi-axis Teslameter but it does look like a very impressive Teslameter. https://www.lakeshore.com/products/categories/magnetic-products/gaussmeters-teslameters
Modern smartphones can also get you some of the way, as they are extremely sensor-packed, but often on a limited measurement range/span.

[Kean]

I've had a TD8620 in my shopping cart for a few weeks, but no immediate need other than to experiment so I haven't committed to it.
Good to hear some feedback of this class of devices.

[joeqsmith]

We have a decent meter where I work.  I should take this thing in and compare it.   Then again, I don't know how accurate that meter is. I know it cost a fair amount more.    I saw a company selling calibrated magnets that may work for a standard.