Patent ID: 6776045
Filing Date: 2004-08-17
Classification: G01L

Abstract:
An industrial process control system for controlling a process pressure of a fluid moving in a pipe, said control system comprising:a pressure sensor disposed within said pipe in fluid communication with said fluid, said pressure sensor comprising: an optical sensing element, having at least one pressure reflective element disposed therein, said pressure reflective element having a pressure reflection wavelength; said sensing element being axially strained due to a change in external pressure, said axial strain causing a change in said pressure reflection wavelength, and said change in said pressure reflection wavelength being indicative of said change in pressure; and at least a portion of said sensing element having a transverse cross-section which is contiguous and made of substantially a single material and having an outer transverse dimension of at least 0.3 mm; wherein said pressure sensor provides a pressure signal indicative of said process pressure of said fluid; and a processor that provides a control sianal, in response to the pressure signal, to a device that controls a parameter that effects the process pressure of the fluid within the pipe.