pH meters are electric appliances used for measuring the- alkalinity or acidity of a solution. pH is measured using potentiometric methods or pH indicators such as indicator solutions or strips ...

We have just begun to learn how to use nature's pH meter. Modi, S. et al. A DNA nanomachine that maps spatial and temporal pH changes inside living cells. Nat. Nanotechnol. 4, 325–330 (2009).

The most accurate method of determining soil pH is by a pH meter. A second method which is simple and easy but less accurate then using a pH meter, consists of using certain indicators or dyes. Many ...

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pH meters are used to determine the pH of a water sample or solution. There are four pH meters in the engineering laboratories. pH meters use electrodes to determine the difference in electrical ...