![]() ![]() “Moog Sub 37 (2014-) potentiometer are plastic shaft, but are bolted to the panel” By Pete Brown from Gambrills, MD, USA – Sub 37 potentiometer (CC BY 2.Metrical patterning and rhyme are frequently employed in poetry but also in infant-directed speech, play, rites, and festive events. “PH Meter” By Datamax – Own work (Public Domain) via Commons WikimediaĢ. “PH Meter.” Wikipedia, Wikimedia Foundation, 3 June 2019, Available here. However, the key difference between pH meter and potentiometer is that the pH meter measures the hydrogen ion activity in aqueous solutions, whereas the potentiometer measures the voltage by comparing an unknown voltage to a known voltage. In summary, the pH meter is a type of potentiometer. The below infographic details more information related to the difference between pH meter and potentiometer. So, this is the difference between pH meter and potentiometer in terms of the principle behind their function. However, the principle of a potentiometer is that the potential dropped across a segment of wire (which has a uniform cross-section and carries a constant current) is directly proportional to the length of the wire. Moreover, the pH meter measures the voltage between two electrodes (indicator and reference electrodes) and display the result as a pH value. ![]() The key difference between pH meter and potentiometer is that the pH meter measures hydrogen ion activity in aqueous solutions, whereas the potentiometer measures the voltage by comparing an unknown voltage to a known voltage. What is the Difference Between pH Meter and Potentiometer? A potentiometer can give very accurate results if we use an accurately calibrated voltage diver. The known voltage is “the reference voltage”. If we use a highly sensitive instrument, then we have to draw a little current through the source having the unknown voltage. It measures the voltage by comparing a known voltage with an unknown voltage. What is Potentiometer?Ī potentiometer is an instrument we use to measure voltages. Besides, it is also important in soil pH measurement for agricultural purposes. Moreover, it is important in laboratory analysis. Then, the electronic amplifier can detect this potential difference and converts it into pH units.įurthermore, we commonly use pH meters for the determination of acidity and alkalinity of water, i.e. It creates an electrochemical potential across the glass bulb. When we immerse the probe in the test solution, the hydrogen ions in the solution are exchanged with the positively charged ions in the glass bulb. The glass electrode specifically contains a glass bulb that is sensitive to the hydrogen ion concentration. The probe contains a bulb as the sensor at the terminal. Usually, manufacturers make these probes using glass. The electrodes in this instrument are rod-like structures. To measure the pH, we need to immerse the probe into the test solution. Moreover, it has a display that is calibrated with pH units and a probe, which contains the pH electrode. The meter contains a simple electronic amplifier and two electrodes for this purpose. ![]() When considering the principle behind the pH meter, it measures the voltage between two electrodes and displays the result as a pH value. However, this difference in electric potential relates to the pH of the solution. Besides, it is a type of potentiometer because it measures the potential difference between the pH electrode and a reference electrode. The lower the pH value, the more acidic the solution is. The higher the pH value, the more the alkaline is the solution. The instrument can indicate the acidity and basicity of solutions as a pH value. ![]() PH meter is a type of potentiometer we can use to measure the hydrogen ion activity in aqueous solutions. Side by Side Comparison – pH Meter vs Potentiometer in Tabular Form Generally, potentiometers have a wide variety of uses in the electric industry other than measuring the pH of a solution. However, it is a type of potentiometer because it measures the potential difference between the pH electrode and a reference electrode. PH meter is often used in chemical analysis for the measurement of pH of water-based solutions. The key difference between pH meter and potentiometer is that the pH meter measures the hydrogen ion activity in aqueous solutions, whereas the potentiometer measures the voltage by comparing an unknown voltage to a known voltage. ![]()
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