Apparatus for measuring temperature

• US 8,231,266 B2
• Filed: 07/13/2006
• Issued: 07/31/2012
• Est. Priority Date: 08/18/2005
• Status: Active Grant

• Current Assignee: Endress + Hauser Wetzer GmbH + Company KG (Endress+Hauser AG)
• Original Assignee: Endress + Hauser Wetzer GmbH + Company KG (Endress+Hauser AG)
• Inventors: Schulze, Stefan
• Primary Examiner(s): Caputo, Lisa
• Assistant Examiner(s): Jagan, Mirellys
• Application Number:
  US11/990,603
• Publication Number:
  US 20090201968A1
• Time in Patent Office: 2,210 Days
• Field of Search: 374/1, 374/148, 374/208
• US Class Current: 374/1
• CPC Class Codes: G01K 15/00 Testing or calibrating of thermometers

Abstract

An apparatus for ascertaining and/or monitoring at least one temperature. The apparatus includes, according to a first variable, at least one temperature sensor, at least one reference temperature sensor and at least one heating/cooling unit, which is thermally coupled with the temperature sensor and with the reference temperature sensor. According to a second variant, the invention includes that at least one reference temperature sensor and the temperature sensor and the reference temperature sensor are embodied and placed in such a manner that they measure essentially the same temperature. At least one head transmitter is provided, which connects the temperature sensor and the reference temperature sensor with the head transmitter in such a manner that the head transmitter receives the data measured by the temperature sensor and the reference temperature sensor. At least one memory unit is provided, in which the measured data of the temperature sensor and the reference temperature sensor are storable.

Claims

1. An apparatus for ascertaining and/or monitoring the temperature of a medium in a container or in a tube or pipe, comprising:

a housing;

at least one temperature sensor;

at least one reference temperature sensor; and

at least one heating/cooling unit, which is thermally coupled with said at least one temperature sensor and with said at least one reference temperature sensor,

wherein;

said at least one temperature sensor and said at least one heating/cooling unit are arranged in said housing, which housing protects against the medium;

in a calibration phase the measured temperature values from said at least one temperature sensor and said at least one reference temperature sensor resulting from corresponding temperatures that act on said at least one temperature sensor and said at least one reference temperature sensor are compared and used for a calibration of said at least one temperature sensor; and

the corresponding temperatures are achieved by way of specific temperatures that can be achieved via the heating/cooling unit.

2. The apparatus as claimed in claim 1, wherein:

said at least one reference temperature sensor is calibratable for at least one temperature value and/or one temperature range.

3. The apparatus as claimed in claim 1, further comprising:

at least one control unit, which controls said at least one heating/cooling unit at least with respect to temperature which said at least one heating/cooling unit produces.

4. The apparatus as claimed in claim 1, wherein:

said at least one reference temperature sensor is arranged releasably in said housing.

5. The apparatus as claimed in claim 1, further comprising:

at least one head transmitter; and

at least one memory unit, wherein;

said at least one temperature sensor and said at least one reference temperature sensor are connected with said at least one head transmitter in such a manner that said at least one head transmitter receives data measured by said at least one temperature sensor and by said at least one reference temperature sensor; and

the measured data of said at least one temperature sensor and said at least one reference temperature sensor are storable in said at least one memory unit.