Sensor for a thermal flow meter, a thermal flowmeter and a method for producing a sensor of a thermal flow meter
First Claim
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1. A sensor for a thermal flow measuring device, comprising:
- a sensor thimble, wherein the sensor thimble has a first longitudinal axis, a lateral surface, an open first end, and a closed second end with a thimble floor, wherein the first longitudinal axis perpendicularly intersects the first end and the second end, and wherein a surface of the thimble floor facing toward the first end is flat;
at least one sensor element, wherein the sensor element is positioned in the sensor thimble at the thimble floor; and
a solder layer thermally connecting the sensor element with the thimble floor,whereinthe sensor element being positioned relative to the surface as defined by at least one spacer, andwherein the at least one spacer includes a cured sinter paste.
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Abstract
The present disclosure relates to a sensor for a thermal flow measuring device, to a thermal flow measuring device, as well as to a method for the manufacture of such a sensor. The sensor includes a sensor thimble, wherein a defined separation of a sensor element from a thimble floor of the sensor thimble is provided by spacers so that a temperature transfer between the sensor and a liquid flowing around the sensor is provided. Thermal contact between the thimble floor and the sensor element is provided by a solder layer.
8 Citations
15 Claims
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1. A sensor for a thermal flow measuring device, comprising:
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a sensor thimble, wherein the sensor thimble has a first longitudinal axis, a lateral surface, an open first end, and a closed second end with a thimble floor, wherein the first longitudinal axis perpendicularly intersects the first end and the second end, and wherein a surface of the thimble floor facing toward the first end is flat; at least one sensor element, wherein the sensor element is positioned in the sensor thimble at the thimble floor; and a solder layer thermally connecting the sensor element with the thimble floor, wherein the sensor element being positioned relative to the surface as defined by at least one spacer, and wherein the at least one spacer includes a cured sinter paste. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A thermal flow measuring device for measuring mass flow of a liquid in a measuring tube having at least one sensor,
comprising: -
the measuring tube having a second longitudinal axis; the at least one sensor positioned in the measuring tube; and an electronic operating circuit equipped to operate the at least one sensor, wherein the at least one sensor includes; a sensor thimble, wherein the sensor thimble has a first longitudinal axis, a lateral surface, an open first end, and a closed second end with a thimble floor, wherein the first longitudinal axis perpendicularly intersects the first end and the second end, and wherein a surface of the thimble floor facing toward the first end is flat; at least one sensor element, wherein the sensor element is positioned in the sensor thimble at the thimble floor; and a solder layer thermally connecting the sensor element with the thimble floor, wherein the sensor element is positioned relative to the surface as defined by at least one spacer, and wherein the at least one spacer includes a cured sinter paste. - View Dependent Claims (11)
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12. A method for manufacturing a sensor for a thermal flow measuring device for measuring mass flow of a liquid in a measuring tube,
wherein the method comprises steps as follows: -
providing a sensor element with a sensor element face; providing at least one spacer on the sensor element face to be oriented to face a thimble floor of a sensor thimble, wherein the at least one spacer is a curable sinter paste; curing the at least one spacer; applying a solder layer on the thimble floor; and melting the solder layer and pressing the sensor element with the spacer against the thimble floor. - View Dependent Claims (13, 14, 15)
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Specification