SENSOR FOR DETERMINING THE THERMAL CAPACITY OF NATURAL GASES

The disclosure concerns a sensor device for determining the thermal capacity of a target fluid, in particular a natural gas. The sensor device comprises a substrate (1), a recess or opening (2) arranged in the substrate (1), a first heating component (11) and a first sensing component (31). The first heating component (11) comprises a first heating structure (21) and a temperature sensor and the first sensing component (31) comprises a temperature sensor. The sensor device is configured to measure the thermal conductivity of the target fluid at a first measuring temperature and at a second measuring temperature. The sensor device is configured to determine a first, in particular a constant, and a second, in particular a linear temperature coefficient of a temperature dependency function of the thermal conductivity and to determine the thermal capacity of the target fluid based on a fitting function. The fitting function is dependent on the first and the second temperature coefficient.