Flow sensor apparatus installed in a fluid path

Details Flow sensor apparatus installed in a fluid path Flow sensor apparatus installed in a fluid path

1996-04-15

1999-03-09

Chilcot, Richard

Measuring and testing

Volume or rate of flow

Thermal type

G01F 168

Patent

active

058803661

ABSTRACT:
A novel flow sensor which includes a wall in a fluid path, a substrate installed on the wall, a flow sensor constructed with at least one electric resistor formed on the substrate, and a construction for reducing turbulence caused by an existence of the flow sensor. The construction for reducing turbulence may be that an upstream side edge of the substrate is formed into a slope shape, a stair shape or a streamline. The construction for reducing turbulence may also be that the substrate is embedded into the wall. In a case that the substrate of the sensor is installed on a support board set in the fluid path, at least an upstream side edge of the support board may be formed into an acute angle or a streamline. Using the apparatus, the turbulence caused by the existence of a vertical wall is reduced because a size of vertical wall portions is small.

REFERENCES:
patent: 4624138 (1986-11-01), Ona et al.
patent: 4688424 (1987-08-01), Handtmann et al.
patent: 5392647 (1995-02-01), Manaka
patent: 5423212 (1995-06-01), Manaka
patent: 5553497 (1996-09-01), Doi et al.

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