MEASURING TRANSDUCER, IN PARTICULAR FOR MEDICAL APPLICATIONS

摘要

A measuring transducer for medical applications comprises a two part housing (6, 7) with a fluid inlet (1) and a fluid outlet (2) along a common axis (4). A solid state sensor chip is exposed with its sensing portion (19) to the fluid. Another portion of the sensor chip is sealed against the fluid and is provided with electrically conductive connector pads (22). The sensor chip (8) is held in a first part (6) of the housing and a second part (7) is in sealed contact with the first part and closes a chamber (11) in which the sensing portion (19) is exposed to the fluid. Electrical connectors (10) are provided in the first part (6) of the housing and are adapted to connect the connector pads (22) of the sensor chip (8) to an external circuitry. In case of a solid state pressure sensor, the chip (8) is fixed to a substrate (17) having a coefficient of thermal expansion matched to the coefficient of the sensor chip.