pH meters automatically maintain the ideal pH of the pool water. For the comfort of bathers, the pH of the pool should be maintained between 7.2 and 7.4. Below this level, the water is aggressive and above it, more doses of disinfectant are needed to prevent algae development. How do automatic pH regulators work? The regulator measures the pH value of the water using a probe placed in the filtration system that permanently analyzes the pool water. Depending on the measured value, the regulator adjusts the pH of the pool using its dosing pump by adding corrective liquid product. In this way, the balance of the pool water is always maintained at the desired value without requiring any intervention.