Nope. Whatever it reads after a quick shake in the water is correct. UNLESS you bought a meter off of ebay for under 50$. Those are never right. I bought one off ebay and it gave me 12 different readings from the same buffer solution. Spend the 100$ on a real ph meter it is worth it as those cheaper meters dont actually work and its like throwing 30$ away!! I just re-checked my oakton after almost 14 months and it still reads 7.0 exactly on the 7.0 buffer solution I have! Oh if you add ph up or down, make sure you mix well before re-checking, there's pockets of low and high if not!
AllforMe Reviewed by AllforMe on . Ph meter Does the tip need to sit in the buffer solution or distilled water? Rating: 5