A multi-element fluid sensor system for determining the health state of a fluid. The sensor system includes at least two sensors for collecting data relating to a particular parameter (e.g., pH, temperature, conductivity, chemistry, viscosity) of the fluid. The at least two sensors may be integrated...http://www.google.de/patents/US6286363?utm_source=gb-gplus-sharePatent US6286363 - Integrated multi-element lubrication sensor and health lubricant assessment system
