The Portapres Automated Blood Pressure (ABP) device is a continuous, non-invasive beat-to-beat blood pressure and heart rate measurement device. The device, used during ground baseline data collection, does not contain a pressure transducer; instead it has a reference transducer. This transducer adjusts for variances in pressure in the event the hand is moved below heart level. The Portapres uses a finger cuff to measure systolic and diastolic arterial pressure waveform. A built-in alarm sounds whenever pressures exceed designated values.