Device for measurement of viscosity in liquid by issuing stable boundary surface wave, has substrate with two superficial diaphragm cells positioned at substrate in adjacent manner

摘要

The device has a substrate with two superficial diaphragm cells (1) positioned at the substrate in adjacent manner. The boundary surface wave is laterally limited by an acoustically hard edge or by a physical edge, and the viscosity of the liquid or the density is assigned to the periodical propagation behavior of the wave. An independent claim is included for a method for operating the device.