What is a pH meter?
A pH meter is a handheld device that tests water for its level of acidity versus base or alkalinity. If water is equally acidic and alkaline, it registers as neutral on a pH meter. The pH meter utilizes a standard pH scale for measuring these aspects of water quality. The level of concentration of positive hydrogen ions in the water determines the result. The acidic side of the pH scale runs from 0 to 6.9, with 7.0 being neutral. Because 7.0 is neutral, 6.8 is considered only slightly acidic. Similarly, 7.2 is only slightly alkaline, with the base scale running to 10.0 or higher. Generally speaking, acidic water is soft while alkaline or base water is hard. Lacking a pH meter, water is pH-tested by adding chemical agents to a water sample. Depending on the agents used, a bright yellow result could indicate highly acidic water; blue, neutral; and deep brown, alkaline water. Hues are interpreted as positions along the scale. Liquid pH tests can be messy and they do require some guesswork
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 and displays the pH reading.
