Patent ID: 8776582

Claim:
A sensor device for measuring the flow of a fluid and/or the presence or level of a substance comprising: a support being equipped with a sensor of a temperature difference based on the Seebeck thermoelectric effect and being a multi-layer printed circuit board support which includes: at least one first insulating support, a second insulating support, an inner conductive layer of a first conductive material separating the first and second insulating supports, the first and second insulating supports having their respective exposed surfaces coated with a first conductive layer of a second conductive material and with a second conductive layer of the second conductive material, first conductive tracks which are obtained in the first and second conductive layers, and second conductive tracks which are realized in the inner conductive layer through and metalized holes being provided in the first and second support elements to connect the first conductive tracks with the second conductive tracks, thus creating at least one thermocouple of the sensor, a heating element being also associated to the sensor and being internally realized in the multi-layer printed circuit board support in the inner conductive layer of the first conductive material.