This product is the direct replacement for M2772A (989803144541). Sidestream monitoring is a good option for 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.