Review on 📏 KWODE Accurate Household Drinking Measurement by Maxwell Thomas

I've finally figured out how to calibrate it. inadvertently. The first attempt I tried with the leaflet, which I spent too much time on, was unsuccessful. Sometimes it was possible to calibrate it with two solutions but not with the third. I finally gave up, but before putting everything away, I poured some 6.86 solution into the lid—just enough to soak the bottom of the meter. - and held it so that it stood at the end of the lid. The next day I was ready to put in another portion of the time but it calibrated well. Or at least it seemed so. 6.86, 4.01 and 9.18 are all recorded on the meter when immersed in buffer solutions. But when I tried to take measurements a little later, they were all wrong for every solution. They weren't ridiculous, mostly within 1/10 and 4/10 of a unit, but if you buy a pH meter you probably know that the difference in pH unit is 10 times the difference in concentration. A pH difference of 4/10 is a disaster.