Fluid flow rate measuring element

Details Fluid flow rate measuring element Fluid flow rate measuring element

1992-05-08

1993-12-21

Chilcot, Jr., Richard E.

Measuring and testing

Volume or rate of flow

Thermal type

731182, G01F 168

Patent

active

052712729

ABSTRACT:
A measuring element for a device for determining the mass of a flowing medium. The measuring element has a plurality of resistor tracks exposed to the flowing medium, and a substrate carrying the resistor tracks, on the surface of which substrate the resistor tracks are disposed, separated from one another. To prevent alteration of the characteristic curve of the measuring element as a consequence of the provision of temperature decoupling slits in the substrate, transversely to the flow direction, the resistor tracks are disposed in succession, as viewed in the flow direction, in stairstep fashion with steps that protrude past the respective preceding resistor track. The substrate is notched in accordance with the stairstep shape of the resistor tracks, in such a manner that one leading edge is formed along each step of the resistor tracks, so that the oncoming flow to the various resistor tracks is unaffected by the preceding step.

REFERENCES:
patent: 4498337 (1985-02-01), Gruner
patent: 4624138 (1986-11-01), Ono et al.
patent: 4777820 (1988-10-01), Hecht et al.
patent: 4831876 (1989-05-01), Porth et al.
patent: 4841769 (1989-06-01), Porth et al.
patent: 5038610 (1991-08-01), Diehl et al.

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