pH Measurement in Refining Crude Unit Overhead

pH is monitored on the separator outlet and used to control the addition of neutralization chemicals to maintain the distillate pH at acceptable levels. Salt impurities accumulate in distillate and create corrosive acidic conditions, leading to short sensor life and frequent cleanings due to the trace oil in the water. Rosemount™ 3500P pH Sensors have oil resistant electrolyte and refillable reference for maximum sensor life. Retractable sensor options are also available for easy cleaning and replacement. The Rosement 3500P pH Sensor features high-temperature glass, poison-resistant electrolyte and a double reference junction to provide maximum sensor life.