This ion-selective electrode (ISE) features a sensitive membrane that generates membrane potential through ion exchange or diffusion processes. The sensor consists of an ion-selective membrane, internal reference electrode (Ag/AgCl), and internal reference solution containing chloride and target ion electrolytes. It measures electrical potential relative to a reference electrode, with the potential difference dependent on specific ion activity in solution, enabling precise quantitative analysis.

• Reagent-free operation eliminates pollution and reduces operational costs
• Redox potential measurement ensures fast response and signal stability
• Polypropylene electrode construction for chemical resistance
• High-quality sensor-specific cables enhance measurement accuracy

1. Remove protective cap from electrode tip (avoid touching sensitive area)
2. Shake electrode downward to remove internal air bubbles
3. Activate new or unused electrodes by soaking in 1 ppm standard solution for 24 hours
4. Rinse with deionized water, blot dry, then immerse in deionized water for 5 minutes with stirring before testing

1. Connect electrode to meter and set to mV mode
2. Place 100 mL deionized water in 150 mL beaker with stirring
3. Add 1 mL of 1000 ppm standard solution, record stable reading (E₁)
4. Add 10 mL of same standard solution, record stable reading (E₂)
5. Calculate slope at 25°C as E₂ - E₁ and compare with specifications

• If slope deviates from specifications, prepare fresh diluted standard solution
• Soak electrode in diluted solution for 10 minutes before retesting
• Repeat calibration procedure or contact technical support if issues persist

• Short-term: Store in deionized water or 1 ppm standard solution
• Long-term: Rinse, dry thoroughly, and store in original packaging
• Reactivate in 1 mg/L standard solution for 2+ hours before reuse