Hella Kgaa Hueck and Company

Meas France

Hella Kgaa Hück & Co.

Hella Gmbh & Co Kgaa

Andreas Buhrdorf

Leonid Matsiev

Thomas Niemann

John F Varni

G Cameron Dales

Oleg Kolosov

Jürgen Palloks

Heiko Dobrinski

Olaf Ludtke

Dirk Wullner

Thomas Kück

Jörg Stürmann

Herbert Claassen

Alexander Wirth

Michael Sternberg

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.

Method of packaging a sensor

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.

Device for measuring the level of a liquid in a container with an ultrasonic transducer

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.

Resonator sensor assembly

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Bremen, Germany

Andreas Buhrdorf