We are counted among the renowned manufacturers, suppliers and exporters of the city engaged in offering optimum functioning Refurbished Philips Respironics CPAP St auto model. Refurbished Philips Respironics CPAP St auto model can adjust the CPAP pressures automatically. Refurbished Philips Respironics CPAP St auto model machines have sensors embedded and keep monitoring your breathing events. If they find you do not snore or you do not stop breathing, your CPAP machine will use a lower pressure (still higher than the minimum pressure). If it detects you start sleep apnea, it will automatically increase the pressure (it won't exceed your CPAP settings' up limit) until you are back to normal breathing.