non-magnetic mechanical stylus force gauge

Hi,
Need to get myself the stylus force gauge and after reading what other people say decided to buy the simple Shure SFG-2 but then realized from one of the reviews on Amazon (as well as here) that it is still a magnetic one? Just curious - if Sure does know that this feature can cause problems why they wouldn't fix it or is there already another one from them which is non-magnetic? I looked at Ortofon as well but that one seems a little too simplistic with only limited number of scale grades. Since I have some MC carts the magnetism I guess can cause a problem, just wondering if this is correct? Appreciate the feedback.
Thank you
Anatoliy