Pressure Converter
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Continuous Positive Airway Pressure (CPAP)

Continuous Positive Airway Pressure (CPAP): Sleep apnea is a sleep disorder affecting millions of people characterized by abnormal pauses in breathing or instances of abnormally low breathing during sleep. CPAP machines use mild air pressure to keep an airway open to enable regular breathing patterns.

SMI is a world market leader in sensors utilized for CPAP machines. We offer a variety of pressure sensors that supply feedback of the applied air pressure in the mask/delivery hose to a microcontroller. This includes our ultra-low pressure sensor technology that can be used to measure flow rates of the CPAP blower.  Lastly, SMI has barometric pressure sensors that can be used to calibrate for altitude and barometric changes in the environment.

Application FunctionRecommended Products
Pressure SensingSM6X21 1% Accuracy, 14-Bit Digital Output
SM6X91 1% Accuracy, 16-Bit Digital or Analog Output
SM9D/G Uncompensated
Barometric SensingSM1131 1% Accuracy
SM5420E Uncompensated
Flow SensingSM9543 500Pa, 1.5% Accuracy
SM9X31 250Pa, 1% Accuracy