This is probably a question for other sigma pmv original owners.
Having recently acquired a sigma pmv original I was keen to put it through it paces and find out what it could and couldn't do.
I found it worked well with all the gold I could throw at it, including capsules and blister packs. Although I did have some difficulty with a rattley Baird blister pack. The air gap confused the sensor, so I put one of the wands under the bar and got a positive reading.
Next I tried it on 999 + 9999 silver rounds and bars which worked great. However it does struggle with high relief coins, but in most cases taking the coin out of the capsule and using the wands works.
I have yet to test platinum, palladium and rhodium or have any success with copper. Does anyone have any experience testing these metals?
Also I haven't had much success with the calibration disk, which I understand also helps with using thin samples, any suggestions?