A pH meter is basically an electronic device that canappropriately measure the acidity of a particular liquid byutilizing specific probes that are often used to examine the pH ofsubstances of a semi-solid nature. In most cases, a standard pHmeter will have within it a measuring rod, made of glass, whichconnects to a meter detailing the pH outcome.The hydrogen ions are covering the thin glass bulb of the probe,and the overall activity is measured. Only a tiny voltage isproduced, namely 0.05 per pH unit, which can be found on themeter.As far as the meter circuit is concerned, pH units show up onthe voltmeter instead of the common volt measurement. When it comesto the circuitry involved, basically several operational amplifiersare in a backward setup and consists of a voltage around -17, atwh