WaterWorks Extended Range pH Test Strips accurately detect pH values of water between 2 and 12 in a matter of seconds.
Product manufactured in the United States by Industrial Test Systems, Inc.
Relationship between pH & Alkalinity?
Think of pH as a measure of quality (how good is the acid or base) and think of alkalinity as a physical count of acidic or basic compounds in a sample.
If you have very few acidic or basic molecules present (low alkalinity), you can easily influence the pH up or down by the addition of more acidic or basic compounds.
Conversely, if you have a lot of acidic or basic compounds in a sample (high alkalinity), you have to add a lot more acidic or basic compounds to influence the pH up or down.