Patent ID: 6726360
Filing Date: 2004-04-27
Classification: G01K

Abstract:
An intensity modulated optic fiber temperature switching immersion probe device for remote sensing of temperature, said device comprising:(a) a Y-shaped optical fiber light guide encased in a metallic sleeve terminated with a metallic end cap and a common end cap; (b) the Y-shaped light guide having a source arm, a detector arm a Y-coupler and a common arm; (c) a light source coupled to the source arm; (d) a photo-detector aligned to the detector arm; (e) the Y-shaped light guide fitting into the common end cap of the metallic sleeve; (f) an evacuated cell containing a chemical and being attached to an end of the common arm of Y-shaped light guide for sensing temperature; (g) the evacuated cell having a aluminum coating on an outside of a bottom surface forming a concave mirror; (h) the evacuated cell being covered with a glass plate on an upper side; (i) the evacuated cell being bonded and coupled to the metallic sleeve by a metallic ring; and (j) a power meter connected to said photo-detector for the processing of an electrical signal.