Orion® pH Buffer & Electrode Rinse Solution PouchesOrion pH Buffer & Electrode Rinse Solution Pouches Accurate calibration Sealed buffer pouch provides disposable convenience More accurate first time measurements Easier to use than conventional liquid buffers; no secondary reservoir required. All buffers are certified NIST traceable; used pouch can be attached to permanent batch records. Each buffer pouch contains lot code and expiration date. Rinse Solutions restore proper electrode performance and