A method and apparatus for determining selected fluid properties including thermal conductivity, pressure and/or temperature using a single heater element of the sensor, and in a relatively short period of time. This is accomplished by measuring a variable phase or time lag between an input signal provided...http://www.google.es/patents/US6079253?utm_source=gb-gplus-sharePatente US6079253 - Method and apparatus for measuring selected properties of a fluid of interest using a single heater element
Method and apparatus for measuring selected properties of a fluid of ...