These test strips are ideal for checking whether a solution is acid or base; or for checking pH measurements of food, drinks, urine, saliva and water.
33811-0114 strips measure pH 1 step increments; best used when you are unsure if your solution is acid or base. Test acid and base pH 1-14.
33811-4510 strips are ideal for accurate measurement of most food, drinks, urine, saliva and water. May also be used for checking correct positioning of a nasogastric tube or stomach acid. Test 4.5-10 acid or alkaline levels.
Both have an easy-to-read chart on package. Can be used for testing your water pH and concentrated chemicals.
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