Full copies of the original patent documents can be obtained from: The British Library, 96 Euston Road, London NW1 2DB, UK. US Patent and Trademark Office, 600 Dulany Street, Madison East, Concourse Level, Alexandria, VA 22314, USA. The Japanese Patent Office, 3-4-3 Kasumigaseki, Chiyoda-ku, Tokyo 100-8915, Japan. A system and method for monitoring a dry gas seal positionable between a stationary housing and a rotatable shaft. A plurality of sense elements may rotate in response to the rotation of the rotatable shaft and a speed sensor may sense the speed of the rotatable shaft at speeds below one thousand rotations per minute based on sensing the plurality of sense elements. A processor may receive output signals from the speed sensor and may establish a position of the dry gas seal or an operating condition of the dry gas seal based on the signal from the speed sensor.
展开▼
