For regular calibration of electronic...
For regular calibration of electronic pH-meters. Content per bottle: 100 ml.
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What is pH?
pH is the measurement of the concentration of free hydrogen ions in a liquid. The pH of pure water is 7. Liquids having a larger concentration of hydrogen ions than water are acid and have a pH-value of less than 7. Liquids with a lower concentration of hydrogen ions, on the other hand, are base and have a pH value higher than 7. The pH scale runs from 1 to 14.
Maintaining a pH-meter
Your pH-meter is a precision instrument. Proper use and appropriate maintenance are important if you are to enjoy it for a long time. Here are some things to look out for: