Determining the full scope and incremental pressure and air flow to be detected is the primary factor to be considered. Sensors in the diagnostic field hospital may also require the clean, dry air to other media except compatibility. In some diagnostic apparatus, releasing the gas from the plastic or adhesive, although the number of minimal contamination of samples and the test results will vary. Precision, especially in terms of linearity and hysteresis error, are very important. Because the sensitivity of the sensitivity of the entire system and sensors to be used is concerned, it should minimize hysteresis. 0.25% accuracy error is the best (non-linear and hysteresis error), and 0.5% is usually the maximum permissible value exist.
Stability is very important, because the drift may unexpectedly affect the sensor reading. If the sensor drift occurs after the device is made (before the device shipped complete calibration), the result will be biased. Sensors enable the manufacture and installation process, you must consider how to prevent the effects of heat and mechanical stress, because it will affect the stability of device performance. In hospital diagnostic applications, for the drift and instability associated error terms, 0.5% or less is acceptable maximum.