a sophisticated volt meter capable of reading small millivolt changes from the pH electrode system
a very sensitive potentiometer that is used to measure voltage, without the worry of an electrical current
tool used to measure the pH of a sample. pH meters come in a variety of prices and accuracies.
A sensitive volt meter used to measure pH via an electrode placed in the water.
An instrument with a digital display that measures the PH of a solution. The device must be calibrated with a solution of known PH. A properly calibrated PH meter is more accurate than PH paper because visual comparison of colors is not required.
A pH meter is an electronic instrument used to measure the p H (acidity or basicity) of a liquid (though special probes are sometimes used to measure the pH of semi-solid substances, such as cheese). A typical pH meter consists of a special measuring probe (a glass electrode) connected to an electronic meter that measures and displays the pH reading.