Which instrument is used for pH measurement?

Which instrument is used for pH measurement?

• A. pH indicator strips
• B. Refractometer
• C. Electrometric meter
• D. Thermometer

Answer: (C)

Measuring pH relies on detecting hydrogen ion activity with an electrode-based device. An electrometric meter, commonly called a pH meter, uses a glass electrode and a reference electrode to sense voltage changes that correspond to different pH levels. It provides a direct, precise pH reading after calibration with buffer solutions, which is essential for accurate water treatment analysis. pH indicator strips can give a quick, approximate pH through color change but aren’t as precise. A refractometer measures how light bends to estimate concentration, not pH. A thermometer measures temperature, which can influence pH readings but does not measure pH itself.

Measuring pH relies on detecting hydrogen ion activity with an electrode-based device. An electrometric meter, commonly called a pH meter, uses a glass electrode and a reference electrode to sense voltage changes that correspond to different pH levels. It provides a direct, precise pH reading after calibration with buffer solutions, which is essential for accurate water treatment analysis.

pH indicator strips can give a quick, approximate pH through color change but aren’t as precise. A refractometer measures how light bends to estimate concentration, not pH. A thermometer measures temperature, which can influence pH readings but does not measure pH itself.