14830 / AC Pressure Sensor / Safety DIN Connector SleepSense Pressure Sensors are designed to detect respiratory airflow and snoring for recording onto a polygraph, EEG or similar type of physiological recorder.  The internal Piezo Crystal senses minute pressure changes and filters them into two bands; one for slow waves to the flow channel and one for fast waves into the snore channel.  The sensor plugs directly into the electrode jack box, (no external power source is required), and a nasal or oral/nasal cannula is attached to the patient. 1 Year Warranty