Indigo 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. 33811-4510 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 · Easy-to-read chart on package · Can be used for testing your water pH and concentrated chemicals · Remove one test strip from package