Hope you are still around. After reading this post I decided to buy an Orion 301 to do my SO2 tests. My reds are too dark sometimes to see the color change so I hope this will help. I am still waiting to receive my new old pH analogs meters, but I have already a few questions. I would like to "tune" mine as well so I can see more easily the results and I hope you can help me with that. Also, can I include the starch and see both mV and change of color if I do it in H2O?
Thanks a lot