The fully calibrated SFM3400 proximal flow sensor is available in a single-use and reusable version. It handles flow rates up to 33 slm, making it suitable for use in the neonatology and pediatric care segments. The digital SFM3400 is fully bi-directionally calibrated, extremely accurate and robust, and has a fast signal processing time. The special design of the flow channel results in minimal dead space (<1 ml), while the slightly increased pressure drop ensures extremely high stability in varying inlet conditions. The sensor can also be connected via medical cones to establish a pneumatic connection to the respiratory cycle. It has a mechanical interface for setting up a user-friendly electrical connection. Combined, these features make the new neonatal proximal flow sensor particularly suitable for proximal flow measurements in medical ventilation and anesthesia. It is also ideal for other neonatal OEM applications requiring proximal flow measurements.