High Quality Content by WIKIPEDIA articles! A pH meter is an electronic instrument used to measure the pH (acidity or alkalinity) of a liquid (though special probes are sometimes used to measure the pH of semi-solid substances) A typical pH meter consists of a special measuring probe (a glass electrode) connected to an electronic meter that measures ожныя and displays the pH reading The pH probe measures pH as the activity of hydrogen ions surrounding a thin-walled glass bulb at its tip The probe produces a small voltage (about 0 06 volt per pH unit) that is measured and displayed as pH units by the meter For more information about pH probes, see glass electrode.  применению2010 г Мягкая обложка, 76 стр ISBN 613050635X.