Patent ID: 9091601
Filing Date: 2015-07-28
Classification: G01C,G01K

Abstract:
1. An apparatus for calibrating or validating a thermometer in situ, having: a temperature sensor in the form of a resistance element for determining a temperature, wherein an electrical resistance of said resistance element is measured and thereby the temperature is determined; and a reference element for calibrating said resistance element, wherein: said reference element at least partially comprises a ferroelectric material, which experiences a phase transformation at least at one predetermined temperature in a temperature range relevant for calibrating or validating said resistance element; and said resistance element and said reference element are integrated in a thermometer component and wherein said reference element is arranged next to the resistance element and is sufficiently close to the same temperature as the resistance element; wherein said reference element comprises a capacitor element with a dielectric, and said ferroelectric material at least partially comprises the dielectric of said capacitor element.