Patent ID: 8272274

Claim:
A MEMS device for determining at least one property of a fluid, the device comprising: a substrate; a first base on the substrate; a tube structure extending from the first base and spaced apart from a surface of the substrate, the tube structure comprising at least one pair of geometrically parallel tube portions substantially lying in a plane, at least one continuous internal passage defined at least in part within the parallel tube portions, and an inlet and outlet of the internal passage fluidically connected to the first base, the tube structure being configured for vibrational movement in the plane of the tube structure; at least one drive element in proximity to the tube structure and operable to induce the vibrational movement of the tube structure in the plane of the tube structure and to induce resonant vibrational movements in the tube portions; and at least one sensing element in proximity to the tube structure and adapted to sense deflections of each of the tube portions when the tube structure is vibrated with the at least one drive element.