คุณลักษณะ

• The test paper is immersed in the sample liquid and immediately removed to compare with the color chart to read the pH value.
• Since the launch of Micro-Essential Laboratory (MEL) in 1934, the company has gained experience with dyes used, and efforts to expand the range of pH measurement use have paid off, establishing the Hydrion brand, whose quality, accuracy and reliability have now made MEL's quality the standard.
• For unknown samples, it is recommended to measure the pH value beforehand for safety.
• It is a book type with a fixed length of test paper.