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US 2009/0260431 A1Published application
Mass flow meter with solder/braze-flow secured spacer
AssigneeSierra Insturments, Inc.
InventorsJohn G. Olin, John P. Smitherman
Life of this patent
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AssigneeSierra Insturments, Inc.
InventorsJohn G. Olin, John P. Smitherman
Estimating the term…
A thermal anemometer or mass flow meter typically having temperature and flow velocity sensor elements is provided in which a thin film temperature sensor is used in the heated sensor of the fluid velocity sensor element of the system. At least one thin-film RTD sensor is held within a spacer or interface member and the spacer, optionally, received within a housing. The thermal anemometer is preferably constructed to offer sufficient precision and accuracy in its design to be suitable for sensitive scientific and industrial applications. This goal is achieved while using cost effective parts by employing a construction approach in which the spacer and RTD sensor(s) is secured in place by solder, braze or another compound flowed into place while inserting the spacer and/or sensor(s).
An apparatus for use in a mass flow meter for immersion in a fluid including a velocity sensor element, the velocity sensor element, comprising:
An apparatus for use as a mass flow meter in a fluid, comprising a metal spacer having cross-section defining a circular diameter and a hole, the hole sized to fit at least one thin-film RTD temperature sensor with a gap up to about 0.020 inches around the at least one sensor, and a fill material at least substantially filling the gap.
A method of making an apparatus for use as a mass flow meter in a fluid, the method comprising:
Dependencies are inferred from the claim text.