Interface between a sensor unit and an explosion resistant housing

Patent metadata

Field	Value
Publication number	US-9541428-B2
Application number	US-201314425677-A
Country	US
Kind code	B2
Filing date	Aug 28, 2013
Priority date	Sep 10, 2012
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

An interface between a sensor unit and an explosion resistant housing, wherein arranged in the explosion resistant housing is a measurement amplifier. In the interface, which is simply manufacturable and, despite that, meets the requirements of explosion protection, the measurement amplifier is arranged on a plug unit formed in the sensor unit and preferably protruding inwardly into the explosion resistant housing.

First claim

The invention claimed is:

1. An interface between a sensor unit and an explosion resistant housing, wherein:
arranged in said explosion resistant housing is a measurement amplifier;
said measurement amplifier is arranged on a plug unit formed in said sensor unit;
a sensor unit housing part surrounding said plug unit bears a screw thread, on which said explosion resistant housing is screwed on; and
a locking element is provided on said housing for setting a predetermined twist position between sensor unit and said explosion resistant housing.

2. The interface as claimed in claim 1 , wherein:
said plug unit is embodied plug- or socket like for manufacture of an electrical connection; and
a socket carrying said measurement amplifier, or a plug carrying said measurement amplifier, is placed on said plug unit.

3. The interface as claimed in claim 1 , wherein:
said plug unit includes at least two chambers for spatial isolation of conductors with different signals.

4. The interface as claimed in claim 3 , wherein:
said conductors are arranged grouped or isolated for positioning in said at least two chambers.

5. The interface as claimed in claim 3 , wherein:
said conductors are embodied as pin contacts, which are soldered in the region of said sensor unit with signal lines of a sensor.

6. An interface between a sensor unit and an explosion resistant housing, wherein:
arranged in said explosion resistant housing is a measurement amplifier;
said measurement amplifier is arranged on a plug unit formed in said sensor unit;
said plug unit includes at least two chambers for spatial isolation of conductors with different signals; and
said conductors in said plug unit are potted for pressure resistant encapsulation.

7. An interface between a sensor unit and an explosion resistant housing, wherein:
arranged in said explosion resistant housing is a measurement amplifier;
said measurement amplifier is arranged on a plug unit formed in said sensor unit;
said plug unit includes at least two chambers for spatial isolation of conductors with different signals;
said conductors are led through a metal plate for achieving a pressure resistant encapsulation and a gas-sealed connection; and
said conductors are insulated from said metal plate by means of welded glass.

8. An interface between a sensor unit and an explosion resistant housing, wherein:
arranged in said explosion resistant housing is a measurement amplifier;
said measurement amplifier is arranged on a plug unit formed in said sensor unit;
said plug unit includes at least two chambers for spatial isolation of conductors with different signals; and
said conductors are electrically shielded from one another by at least one metal web.

9. The interface as claimed in claim 6 , wherein:
a sensor unit housing part surrounding said plug unit bears a screw thread, on which said explosion resistant housing is screwed on.

10. The interface as claimed in claim 9 , wherein:
a locking element is provided on said housing for setting a predetermined twist position between sensor unit and said explosion resistant housing.

11. The interface as claimed in claim 1 , wherein the plug unit protrudes inwardly into said explosion resistant housing.

12. The interface as claimed in claim 1 , wherein:
said plug unit is embodied plug like for manufacture of an electrical connection; and
a socket carrying said measurement amplifier carrying said measurement amplifier is placed on said plug unit.

13. An interface between a sensor unit and an explosion resistant housing, wherein:
arranged in said explosion resistant housing is a measurement amplifier;
said measurement amplifier is arranged on a plug unit formed in said sensor unit;
said plug unit is embodied socket like for manufacture of an electrical connection; and
a plug carrying said measurement amplifier, is placed on said plug unit.

14. The interface as claimed in claim 3 , wherein:
said conductors are embodied as pin contacts, which accept said socket carrying said measurement amplifier.

15. The interface as claimed in claim 3 , wherein:
said conductors are embodied as pin contacts, which accept said plug carrying said measurement amplifier.

16. The interface as claimed in claim 3 , wherein:
said conductors are arranged isolated for positioning in said at least two chambers.

17. The interface as claimed in claim 8 , wherein:
the at least one metal web is connected with ground.

18. The interface as claimed in claim 1 , wherein:
the screw thread is embodied explosion-resistantly.

Assignees

• Endress & Hauser Flowtec Ag

Inventors

• Fink Nikolai
• Beissert Markus
• Bonschab Sr Frank
• Larsson Bjorn
• Worreth Bruno

Classifications

• H01R4/023

  between cables or wires and terminals · CPC title

• G01F15/14

  Casings, e.g. of special material · CPC title

• H01R13/5216

  characterised by the sealing material, e.g. gels or resins · CPC title

• G01D11/245 Primary

  Housings for sensors · CPC title

• H01R13/6588

  with through openings for individual contacts · CPC title