Patent ID: 7729567

Claim:
An optical fiber transducer for simultaneous determination of pressure and temperature of a flowing fluid, comprising: a hollow tube for receiving the flowing fluid therethrough, wherein said tube contains: an optical fiber; two gratings on said fiber; a strain inducing device connected to the optical fiber between the two gratings, where the strain inducing device is configured so that fluid flowing through the hollow tube exerts pressure on the strain inducing device; and a plurality of clamps mounted within the tube and configured to hold the optical fiber in position within the hollow tube; and a fiber head connector configured to connect the optical fiber to a light source and a detector, where the fiber head connector is configured to direct light from the light source to the two gratings and to direct a reflected light signal indicative of geometric changes of the two gratings associated with the pressure and temperature of the flowing fluid to the detector; wherein the two gratings and the strain inducing device are arranged to be immersed in and contacting the flowing fluid.