Ag/AgCl Reference Electrode

Description

This Ag/AgCl reference electrode provides a stable, well-defined potential for aqueous electrochemistry without mercury. In saturated KCl at 25 °C its practical potential is ~+0.197 V vs NHE; other KCl concentrations (e.g., 3 M, 1 M) shift the potential slightly, letting you match literature or method requirements. The fritted junction ensures good ionic contact, and refillable designs support long service life. Use Ag/AgCl in corrosion, sensors, electrocatalysis, and routine voltammetry where chloride is acceptable. For chloride-sensitive systems (e.g., certain plating baths or chloride-free mediators), consider a double-junction variant or Hg/Hg2SO4. Compatible with standard three-electrode cells, potentiostats, and Luggin capillaries; maintain the junction free of bubbles and keep the fill level above the sample to avoid back-diffusion. Store per manufacturer guidance (typically in KCl solution).