Sensor unit comprising an air humidity sensor and an air temperature sensor

• US 20040007049A1
• Filed: 08/14/2003
• Published: 01/15/2004
• Est. Priority Date: 10/18/2000
• Status: Active Grant

• Current Assignee: Sitronic Gesellschaft Fur Elektrotechnische Ausrustung mbH & Company KG
• Original Assignee: Sitronic Gesellschaft Fur Elektrotechnische Ausrustung mbH & Company KG
• Inventors: Hoppach, Elmar
• Granted Patent: US 6,990,847 B2
• Time in Patent Office: Days
• US Class Current: 73/29.02
• CPC Class Codes: G01K 7/16 using resistive elements resistive elements per se H01C, H01L
• CPC Class Codes: G01N 25/66 by investigating dew-point
• CPC Class Codes: G01N 27/223 for determining moisture content, e.g. humidity rain detectors on vehicle windows B60S1/0825

Abstract

A sensor unit comprises a mounting base (1) on which an air moisture sensor (3) and an air temperature sensor (4) are disposed. The air moisture sensor (3) is disposed over a bore (5) of the mounting base and covers the bore (5) at least partially. An intensive thermal coupling between the air moisture sensor (3), air temperature sensor (4) and air mixture to be analysed is produced.

Claims

1. Sensor unit comprising sensors, disposed on a mounting base (1), an air moisture sensor (3) and an air temperature sensor (4), characterized in that a thermally conducting coating (2) of the mounting base (1) is provided for connection with the air moisture sensor (3) and the air temperature sensor (4).

2. Sensor unit according to claim 1, characterized in that the air moisture sensor (3) is designed as capacitive, flat structural element and is connected to the thermally conducting coating (2) of the mounting base (1) via flat contacts.

3. Sensor unit according to any one or several of the preceding claims, characterized in that the air temperature sensor (4) is disposed in the direct vicinity of the air moisture sensor (3).

4. Sensor unit according to any one or several of the preceding claims, characterized in that the inner surfaces of the bore (5) are provided with the thermally conducting coating (6).

5. Sensor unit according to any one or several of the preceding claims comprising a casing for receiving the sensor unit, characterized in that the casing has air passage openings which are disposed opposite to the bore (5).

6. Sensor unit according to any one or several of the preceding claims, characterized in that a casing (7, 8, 9) of the sensor unit (1) is provided which is climate-permeable on one or both sides.