12720-DIGITAL PH METERS

Features:

• Measures pH & mV
• Highly Stable and Accurate
• Auto Temperature Compensation Facility
• 3 ½ digit LED Display
• Auto Polarity & Decimal Indication
• Battery & Mains Operated Available
• Slope Control
• Rugged and Reliable design
• Highly Stable and Accurate
• ATC Facility (101)
• Slope Control

Specifications:

Here’s a brief overview of how digital pH meters work:

1. Electrode System:
   • A digital pH meter typically consists of a probe or electrode system. The electrode contains a special glass membrane that is sensitive to hydrogen ions (H+). There is also a reference electrode that maintains a stable potential.
2. Ion-Selective Electrode (ISE):
   • The glass membrane of the pH electrode is an ion-selective electrode, specifically selective to H+ ions. When immersed in a solution, the glass membrane allows H+ ions to pass through, generating a potential difference.
3. Reference Electrode:
   • The reference electrode provides a stable reference potential against which the potential generated by the ion-selective electrode is measured.
4. Potential Difference Measurement:
   • The potential difference between the ion-selective electrode and the reference electrode is proportional to the concentration of H+ ions in the solution. This potential difference is converted into a pH value by the pH meter.
5. Calibration:
   • Digital pH meters need to be calibrated regularly to ensure accurate measurements. Calibration involves adjusting the meter based on known standard solutions with defined pH values. This establishes a reference point for the meter to accurately measure pH in unknown solutions.