The Rosemount Hx338+ Steam Sterilizable & Autoclavable pH Sensor provides the biotechnology and pharmaceutical industries with a unique pre-pressurized pH reference technology. The pre-pressurized reference stops contamination between batches by not allowing the process to leak into the pH sensor. The pH reference also features a triple barrier junction which works to maintain a drift-free pH signal and fight poisoning ions (i.e., sulfides, proteins, or sugars), even after numerous sterilization cycles.