The Paracube Sprint from Hummingbird Sensing Technology, Crowborough, U.K., is a paramagnetic oxygen sensor with a full measurement range of 0–100% O₂ and a size of 43.3 by 30 mm by 33.5 mm for use in medical oxygen monitoring applications. Features include industry-leading levels of linearity, accuracy, and reliability, a nonconsumable design that provides excellent measurement stability, analog and digital signal outputs, and a fast enough response time to reconstruct and monitor expired oxygen, enabling clinical decisions to be made. The sensor is suited for use in breath-by-breath applications such as anesthesia and pulmonary function testing.