Stylus force digital scales


Digital scales from Clearaudio and others range from $200-500. Amazon has 'em for $20. Why cant I use one of these instead and save big bucks?
tbromgard
Is that Audio Additives scale truly non-magnetic?

I have the identical one from Acoustic Sounds (provably made by the same manufacturer) and its magnetic and still needs taring when I put my cart hovering over the weigh scale area.
Philb7777, the audio additives scale is completely non magnetic. I double checked last night.
After nearly 2 years use my Ortofon DS-3 has become unstable. Adjusting tare cannot solve the problem as it will not maintain zero and starts to display 0.01... 0.20 values. Anyone having the same issue... please advice. Thanks