Sensor for liquid and/or gas analysis directly connectable to a higher-ranking control system

• US 8,766,168 B2
• Filed: 07/14/2011
• Issued: 07/01/2014
• Est. Priority Date: 07/14/2010
• Status: Active Grant

• Current Assignee: Krohne Messtechnik GmbH & Co. KG
• Original Assignee: Krohne Messtechnik GmbH & Co. KG, Wolfgang Babel
• Inventors: Babel, Wolfgang
• Primary Examiner(s): LUU, THANH X
• Application Number:
  US13/182,602
• Publication Number:
  US 20120038917A1
• Time in Patent Office: 1,083 Days
• Field of Search: 250/239
• US Class Current: 250/239
• CPC Class Codes: G01N 27/286 Power or signal connectors associated therewith
• CPC Class Codes: G01N 33/00 Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
• CPC Class Codes: G01N 33/0009 General constructional details of gas analysers, e.g. portable test equipment G01N1/22 takes precedence
• CPC Class Codes: G01N 33/0073 Control unit therefor

Abstract

A sensor of the type for liquid and/or gas analysis, which is connected to a measuring and/or evaluating system or, respectively, to a higher-ranking control system and has a sensor housing. The circuit for the collecting, processing and transmitting measured values to the measuring and/or evaluating system or to the control system (19) are provided in the sensor housing (2). This circuit has analog sensor electronics (3), an analog-digital converter (14) for converting the detected analog measured values into digital measured values, a processing unit (15) and communication device (17) for processing and transmitting the digital measured values to the measuring and/or evaluating system or to the control system (19) according to a standard communication protocol of process technology.

Claims

1. Sensor for at least one of liquid and gas analysis, which is connected directly to a higher-ranking control system, comprising:

a sensor housing, and

circuit means for collecting, processing and transmitting measured values to the higher-ranking control system provided in the sensor housing,

the circuit means comprising means for measuring a pH-value, analog sensor electronics, an analog-digital converter for converting detected analog measured values into digital measured values, a processing unit and communication means for processing and transmitting the digital measured values to said higher-ranking control system according to a communication protocol, and

wherein means for galvanic separation are provided both between said analog-digital converter and the processing unit and between the processing unit and said communication means.

2. Sensor according to claim 1, wherein the communication means is adapted for transmitting the digital measured values to said higher-ranking control system according to the HART field bus communication protocol in two-wire technology.

3. Sensor according to claim 1, wherein the sensor housing is in the shape of a hollow cylinder having a diameter of 12 mm.