Sensor package for harsh environments

Details Sensor package for harsh environments Sensor package for harsh environments

2005-06-28

2005-06-28

Easthom, Karl D. (Department: 2832)

Electrical resistors

Resistance value responsive to a condition

Ambient temperature

C073S204120, C073S204130, C073S204250

Reexamination Certificate

active

06911894

ABSTRACT:
A sensor can be configured to generally include a flow channel block having a flow channel formed therein, and a sensor chip for sensing fluid flow, wherein a fluid in the flow channel surrounds the sensor chip. Alternatively, the sensor chip can be fastened at one side to a substrate and on another side of the substrate to a core tube inserted into the flow channel. This core tube provides electrical insulation and corrosion protection to the sensor chip, reduces flow noise, (and by the non-intrusive nature of the measurement) essentially eliminates the risk of fluid leakage, and maintains the fluid super-clean and contamination-free while improving structural integrity for the thermal measurements derived from the sensor chip. The use of such a core tube configuration also can protect the sensor from corrosion, radioactive or bacterial contamination, overheating, or freeze-ups. Such a core tube configuration also enables the core tube to be detachable and disposable, without requiring the replacement of the more costly sensor chip with its electronics and calibration.

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