Patent ID: 8727613
Filing Date: 2014-05-20
Classification: G01D,G01K,G01L

Abstract:
1. A method of determining a value of a parameter comprising: a) providing a high temperature sensor capable of withstanding a temperature of at least 650degrees C., wherein the sensor includes a wavelength dependent element; b) placing the high temperature sensor at a location where a black body radiation is generated about the wavelength dependent element wherein the black body temperature does not exceed the glass transition temperature for the wavelength dependent element; c) detecting black body radiation by the sensor at a location a distance away from the sensor and determining a temperature value from said radiation; d) detecting a signal from the wavelength dependent element which corresponds to a wavelength dependent shift corresponding to the temperature and a wavelength shift due to the parameter; e) using the value of the temperature determined in step (c) to calculate a wavelength shift due to temperature variation; f) subtracting the wavelength shift due to temperature variation from the wavelength shift from the wavelength dependent element to determine a wavelength shift due to the parameter; and g) determining the value of the parameter due to the determined wavelength shift due to the parameter.