Temperature sensor and method for its manufacture

• US 8,166,813 B2
• Filed: 03/12/2009
• Issued: 05/01/2012
• Est. Priority Date: 03/20/2008
• Status: Active Grant

• Current Assignee: Endress+Hauser Flowtec AG (Endress+Hauser AG)
• Original Assignee: Endress+Hauser Flowtec AG (Endress+Hauser AG)
• Inventors: Boghun, Dirk, Holoubek, Jiri, Polak, Jiri, Popp, Oliver, Pfau, Axel
• Primary Examiner(s): THOMPSON, JEWEL VERGIE
• Application Number:
  US12/736,190
• Publication Number:
  US 20110005311A1
• Time in Patent Office: 1,146 Days
• Field of Search: 732/042.2, 732/042.4, 732/042.1, 732/041.1
• US Class Current: 73/204.11
• CPC Class Codes: G01F 1/684 Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
• CPC Class Codes: G01F 1/69 of resistive type
• CPC Class Codes: Y10T 29/49002 Electrical device making
• CPC Class Codes: Y10T 29/49826 Assembling or joining
• CPC Class Codes: Y10T 29/49936 Surface interlocking

Abstract

A thermal, flow measuring device for determining and/or monitoring flow of a measured medium through a measuring tube. The thermal, flow measuring device includes: a first pin-shaped shell and at least a second pin-shaped shell; a first resistance thermometer and at least a second resistance thermometer. At least the first resistance thermometer is embodied so as to be heatable, wherein the resistance thermometers, in each case, have a first surface, and at least a second surface, which lies opposite the first surface. The first pin-shaped shell surrounds the first resistance thermometer, and the second pin-shaped shell surrounds the second resistance thermometer. The pin-shaped shells are fillable with a fill material; wherein, in each case, at least one spacer is placeable between the pin-shaped shell and the first surface of the resistance thermometer, and the second surface of the resistance thermometer is at least partially covered with fill material.

Claims

1. A thermal, flow measuring device for determining and/or monitoring the flow of a measured medium through a measuring tube, comprising:

a first pin-shaped shell;

at least a second pin-shaped shell;

a first resistance thermometer; and

at least a second resistance thermometer;

wherein;

at least said first resistance thermometer is embodied so as to be heatable;

said resistance thermometers, in each case, have a first surface, and at least a second surface, which lies opposite the first surface;

said first pin-shaped shell surrounds the first resistance thermometer,

said second pin-shaped shell surrounds said second resistance thermometer;

said pin-shaped shells are fillable with a fill material;

in each case, at least one spacer is placeable between said pin-shaped shell and said first surface of said resistance thermometer; and

said second surface of said resistance thermometer is at least partially covered with the fill material.

2. The thermal, flow measuring device as claimed in claim 1, wherein:

said pin-shaped shells have a first end and a second end;

said pin-shaped shells are securable at their first end in a sensor holder; and

said second end of said pin-shaped shells is, in each case, sealable by a plug.

3. The thermal, flow measuring device as claimed in claim 2, wherein:

said first end of said pin-shaped shells is open, and said second end of said pin-shaped shells is open;

said pin-shaped shells, in each case, are fillable via their first open ends with fill material; and

said spacers, in each case, are insertable into said pin-shaped shells through said second open end of said pin-shaped shells.

4. The thermal, flow measuring device as claimed in claim 1, wherein:

said plug is connectable with said pin-shaped shell in a material-bonding manner.

5. The thermal, flow measuring device as claimed in claim 1, wherein:

said spacer is connectable with said plug in a material-bonding manner.

6. The thermal, flow measuring device as claimed in claim 1, wherein:

said spacer and said pin-shaped shell form a press fit.

7. The thermal, flow measuring device as claimed in claim 1, wherein:

said spacer is cylindrical and has a groove.

8. The thermal, flow measuring device as claimed in claim 1, wherein:

said resistance thermometer is connectable with said spacer in a material-bonding manner.