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Apparatus for determining and/or monitoring process variable

A technology of process variable and monitoring unit, which is applied in the direction of measuring device, application of electrical device to test fluid tightness, heat measurement, etc., and can solve problems such as measurement is no longer accurate, medium leakage, etc.

Inactive Publication Date: 2010-09-01
EHNDRESS KHAUZER GMBKH KO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to such damage, on the one hand the measurement is no longer precise and on the other hand eg media can also escape from the process

Method used

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  • Apparatus for determining and/or monitoring process variable
  • Apparatus for determining and/or monitoring process variable
  • Apparatus for determining and/or monitoring process variable

Examples

Experimental program
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Embodiment Construction

[0020] exist figure 1 A measuring device is described in , which is used as an example to measure the temperature of the medium 12 in the container 11 . As an alternative, the process variables can be: level, density, flow, viscosity or pH-value. The measuring instrument is connected to the container 11 via a process connection 7 (eg a flange). The measuring device essentially consists of a protective tube as protective unit 2 or as monitored housing 10 and an electronics unit 6 in the same housing. Here, the electronics unit 6 (not shown here) is connected, for example, to a superordinate control console or to a fieldbus system.

[0021] Such as figure 2 As shown, there are two temperature sensors 1 , 4 in a protective tube 2 , which here is the monitored housing 10 . Wherein, each temperature sensor is, for example, a (eg PT100) resistance temperature sensor. In another embodiment, at least one temperature sensor is a thermocouple.

[0022] The two temperature sensors...

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PUM

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Abstract

The invention relates to an apparatus for determining and / or monitoring at least one process variable, having at least one housing (10, 2). The invention provides at least one monitoring unit (3) which monitors a state of the housing (10, 2).

Description

technical field [0001] The invention relates to a device for determining and / or monitoring at least one process variable, which device has at least one housing. The process variable is, for example, temperature, level, density, flow, viscosity or pH-value. Background technique [0002] For example, temperature measuring devices are known in the prior art in which a temperature sensor is protected in a protective tube against direct contact with the medium or the process. Through possibly very rough loads, the protection tube may still be damaged or it is also possible that the protection tube is completely torn. Due to such damage, on the one hand the measurement is no longer precise and on the other hand eg medium can also escape from the process. This does not only concern the protective unit, but possibly also the housing in which the actual sensor unit and electronics unit are arranged. Contents of the invention [0003] The invention is based on the task of proposi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D23/19G01M3/00G01M3/40G01K1/08G21C17/00
CPCG01K2213/00G01K3/14G05D23/1928
Inventor 马杜卡尔·普尼亚尼
Owner EHNDRESS KHAUZER GMBKH KO KG