Abstract: An improved method of packaging a sensor is provided. The method includes the step of affixing a tuning fork to a platform. The tuning fork includes tines comprising one or more surfaces, with each tine further comprising an electrode and a piezoelectric material. An application specific integrated circuit (ASIC) is affixed to the platform. Electrical communication between the ASIC and the electrode of each tine is established for providing stimulus to the tuning fork and for receiving a response signal from the tuning fork. A protective layer is applied to cover the platform and a portion of the tuning fork while maintaining a portion of a surface of each tine free from the protective layer such that the surface can displace the fluid in contact therewith.

Abstract: The invention relates to a device for measuring the level of liquid in a container by means of an ultrasonic converter, comprising an ultrasonic converter which is disposed at a distance from the base such that it radiates towards the surface of the liquid and also towards a lower reflector. The ultrasonic converter is, preferably, integrated into a housing which has a large upper opening and a small lower opening. A cavity is arranged in the base of the device below the lower opening.

Abstract: An improved method and assembly, wherein the method generally includes the steps of providing a coated or uncoated sensor element having an exposed sensing surface; attaching the sensor element to a platform so that the exposed sensing surface is spaced from the platform; and optionally applying a protective layer over the platform while maintaining the sensing surface as exposed. The assembly includes a resonator having a free portion with a sensing surface is incorporated onto a platform, components of the sensor are physically shielded from harsh operating conditions, the requisite space is maintained between the free portion of the resonator and the platform, and the sensing surface of the resonator remains exposed for sensing.

Abstract: An improved method and assembly, wherein the method generally includes the steps of providing a coated or uncoated sensor element having an exposed sensing surface; attaching the sensor element to a platform so that the exposed sensing surface is spaced from the platform; and optionally applying a protective layer over the platform while maintaining the sensing surface as exposed. The assembly includes a resonator having a free portion with a sensing surface is incorporated onto a platform, components of the sensor are physically shielded from harsh operating conditions, the requisite space is maintained between the free portion of the resonator and the platform, and the sensing surface of the resonator remains exposed for sensing.

Abstract: The invention relates to a device for measuring the level of liquid in a container by means of an ultrasonic converter, comprising an ultrasonic converter which is disposed at a distance from the base such that it radiates towards the surface of the liquid and also towards a lower reflector. The ultrasonic converter is, preferably, integrated into a housing which has a large upper opening and a small lower opening. A cavity is arranged in the base of the device below the lower opening.

Abstract: An improved method and assembly, wherein the method generally includes the steps of providing a coated or uncoated sensor element having an exposed sensing surface; attaching the sensor element to a platform so that the exposed sensing surface is spaced from the platform; and optionally applying a protective layer over the platform while maintaining the sensing surface as exposed. The assembly includes a resonator having a free portion with a sensing surface is incorporated onto a platform, components of the sensor are physically shielded from harsh operating conditions, the requisite space is maintained between the free portion of the resonator and the platform, and the sensing surface of the resonator remains exposed for sensing.

Abstract: To make available to the vehicle control systems more information on the forces and directions of the forces which act on the individual tires, in order to determine these forces, the displacements between the outer ring and inner ring in the wheel bearings are measured in a contactless fashion using ultrasound. Displacements are measured by one or more sets of an ultrasound transmitter and a receiver on the stationary ring and a reflection surface on the rotating ring for reflecting back the ultrasound energy. The measured time until the signal is received enables displacement to be determined. It is possible to use these displacements to calculate the forces acting from a knowledge of the spring characteristic of the wheel bearings.