pH Measurement in Corn Processing

Corn wet milling is one of the most common methods used to process corn. pH measurements are made throughout the wet milling and starch conversion processes to control product quality, maximize product yield and minimize water consumption. The bulk of the water used for rinsing and washing usually needs pH adjustment to prevent altering the nominally acidic pH present during the various steps. pH measurements throughout the process can be challenging as corn solutions tend to plug the sensor reference junction, and high concentrations of non-conductive sugars and starches can diffuse through the reference junction and poison the sensor. The Rosemount™ 396P pH/ORP Sensor is a reliable solution in wet corn milling applications. The pH sensor's large area helical reference junction design resists coating and plugging while also providing sufficient protection of the reference electrode against being poisoned by the sugars and starches.