I've read a few post about PH meters and many point to the Hanna PH meter model "HI 98128". Unfortunately, can't ship north of border so when looking online there are many available on eBay but they are all Hanna HI 98128 and not the "HI 98128W" model. Apparently the HI 98128W model is specifically one Hanna makes for wine testing but don't know what the difference would be. Anyone have any experience with this or does the standard model work fine?