Imedical Healthcare Solutions
The SleepSense Piezo Snore Sensor - Alice 5 (#1262) provides a signal proportional to the vibrations of the skin, and is immune to ambient noise. The sensor is especially robust, easy to use, and clean. 
Warranty: 6 Months - Free from Defects in Materials and Quality Workmanship.
The sensor responds to snoring and other sounds in the audio range picked up through the skin, and converts them to a small analog voltage that provides a clear, reliable indication of the presence of these sounds. It is designed with a large sensitive area to improve signal stability, a soft, flat surface to seal against ambient noises, and high friction material to minimize shifting.
Compatibility: The SleepSense Piezo Snore Sensor - Alice 5 is completely compatible with the Philips Respironics Alice 5 unit.
NOTE: SleepSense items are for professional use only, and are for sale by or on the order of a physician only.