The present invention relates to a fluid detection system which can be adapted for use in applications including liquid-level detection, pipeflow monitoring, and interstitial leakage in double-walled containers. The system operates on principles of optics and provides the capability of remotely differentiating...http://www.google.es/patents/US5452076?utm_source=gb-gplus-sharePatente US5452076 - Fluid detection system
