G202A – To measure the pH of any surface, wet or dry.
Can detect acid o r alkali residues in 15-30 second. Reads from 0-13 pH with included color chart. Long lasting, use for thousands of individual tests.
Also measures pH of solutions when used with a neutral surface such as glass or porcelain.
Supplied in packs of 3 mechanical pencils and 2 charts.
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