This product is the direct replacement for M2744A (989803144421). 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. For use with an ET tube > 4 mm. Including dehumidification tubing for high humidity environments.