The Rosemount 550 Single-Use pH Sensor is designed to provide high measurement stability for single-use bioprocessing applications. The pH sensor stability of <0.005 pH change per day enables users to do a one-point calibration at the start of the batch and operate for 30 days without any required maintenance or recalibration. Our patented wet storage technique enables a two-year shelf life as well as immediate sensor verification and calibration, eliminating the initial stabilization process.