Are the liquid type Ph test kits accurate?

420pharms;1189001 said:

I should also add that the meter or p.h. pen that I like best is the Milwaukee ph51, it a single point calibration model, it's got screws next to batteries for calibrating, it's very user friendly and has been durable. The digital calibration type's are junk in my opinion and combo units are questionable as well.

Click to expand...