This product is the direct replacement for 989803144471. Sidestream monitoring is a good option for non-intubated spontaneously breathing patients as well as patients requiring intubation during short-term procedural sedation or anesthesia. LoFlo sidestream EtCO₂ sensors use a common extension server, providing clinical versatility to use with the same monitor. No calibration is required. The sensors remain stable over time with continual and automatic validated calibration information.