Intended use The Beckman Coulter Reference Electrode is a replacement / service part for Beckman Coulter AU / Olympus AU series clinical chemistry analyzers. Each item provides the stable reference potential against which the sodium, potassium and chloride electrodes are measured. Fitting an incorrect or worn part can affect sample and reagent delivery, optical performance or fluidics integrity, so replacement must follow the interval and procedure given in the instrument service documentation. Storage & shelf life Store at 15-30 C in a dry area in the original packaging. No temperature-sensitive or date-limited components; shelf life is indefinite when stored as directed. COLD CHAIN: NO - ships ambient. Regulatory status Replacement / service part for the in vitro diagnostic system identified above. Not a diagnostic reagent; carries no independent diagnostic claim and measures no analyte. Installation, replacement interval and use per the instrument service and operator documentation.