4-electrode conductivity measurement

Four-electrode conductivity measurement is a technique used to determine how well a solution conducts electric current. It involves inserting four electrodes into the liquid: two supply a small electrical current, while the other two measure the resulting voltage. By knowing the current and voltage, the system calculates the solution’s conductivity, which indicates ion concentration. Using four electrodes reduces errors caused by resistance at the electrode-contact points, providing a more accurate measurement. This method is common in laboratory and industrial settings for analyzing solutions like water, chemicals, and biological environments.