A capsule casing of a capsule medical device has a chemical sensor inside, used for sensing operation. The chemical sensor has a recovery device which resets the chemical sensor to an initial state thereof so as to use the chemical sensor for the sensing operation a plurality of times or continuously....http://www.google.com.au/patents/US20050177069?utm_source=gb-gplus-sharePatent US20050177069 - Capsule medical device
