DE938276C - Measurement arrangement for pH measurement in media that are under overpressure or underpressure - Google Patents

Measurement arrangement for pH measurement in media that are under overpressure or underpressure

Info

Publication number
DE938276C
DE938276C DER9214A DER0009214A DE938276C DE 938276 C DE938276 C DE 938276C DE R9214 A DER9214 A DE R9214A DE R0009214 A DER0009214 A DE R0009214A DE 938276 C DE938276 C DE 938276C
Authority
DE
Germany
Prior art keywords
measurement
underpressure
pressure
media
under overpressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DER9214A
Other languages
German (de)
Inventor
Martin Dr-Ing Roever
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DER9214A priority Critical patent/DE938276C/en
Application granted granted Critical
Publication of DE938276C publication Critical patent/DE938276C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G01N27/4166—Systems measuring a particular property of an electrolyte
    • G01N27/4167—Systems measuring a particular property of an electrolyte pH

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measuring Fluid Pressure (AREA)

Description

Bei der Messung der Wasserstoffionenkonzentration (pn-Wert) von Lösungen ist es oft erforderlich oder erwünscht, die Meßelektrodenkette in Leitungen einzubauen, die gegenüber der Umgebung unter einem tSber- oder Unterdruck stehen. In diesen Fällen wird das Eindringen der zu messenden Flüssigkeit in die Elektroden bzw. die Zerstörung der Elektroden durch die Druckkräfte dadurch verhindert, daß man die Elektroden unter einen Gasdruck setzt, der gleich dem Druck der zu messenden Flüssigkeit ist oder etwas über dem Druck der zu messenden Flüssigkeit liegt. Dieser Druck wird erfindungsgemäß dadurch erhalten, daß man einen der an sich bekannten Druckwandler benutzt, mit deren Hilfe sich der Druck eines beliebigen Mediums in einen gleichen, proportionalen oder im allgemeineren Fall der Gleichung Pg = PL a a + b folgenden Druck P, eines anderen, meistens gasförmigen Mediums umwandeln läßt, um eine oder beide Elektroden der Meßkette unter einen geeigneten Uber- oder Unterdruck zu setzen. When measuring the hydrogen ion concentration (pn value) of solutions it is often necessary or desirable to install the measuring electrode chain in cables, which are under an overpressure or underpressure in relation to the environment. In these Cases will be the penetration of the liquid to be measured into the electrodes or the Destruction of the electrodes by the pressure forces is prevented by the Puts electrodes under a gas pressure that is equal to the pressure of the liquid to be measured or is slightly above the pressure of the liquid to be measured. This pressure will obtained according to the invention by using one of the pressure transducers known per se used, with the help of which the pressure of any medium is converted into an equal, proportional or in the more general case following the equation Pg = PL a a + b Pressure P, another, mostly gaseous medium can be converted to an or to put both electrodes of the electrode under a suitable positive or negative pressure.

In der Gleichung bedeutet a eine unbenannte Konstante, die Werte zwischen I und etwa 2, b einen konstanten Druck, der Werte zwischen o und etwa Io m WS annehmen kann. In the equation, a means an unnamed constant, the values between I and about 2, b a constant pressure, the values between o and about Io m WS can accept.

In der Zeichnung ist eine Ausführung in einem schematischen Beispiel dargestellt. The drawing shows an embodiment in a schematic example shown.

Der Druckwandler Tr wird von dem Druck p eines in diesem Beispiel gasförmigen Mediums gespeist und verwandelt den Druck einer Flüssigkeit in einer Leitung oder einem Gefäß p1 in einen Druck eines gasförmigen Mediums Pg, der auf den abgeschlossenen Raum H gegeben wird und sich auf die Füllung der Meßelektrode G und der Vergleichselektrode V überträgt. Im Beispiel sind beide Elektroden offen gezeichnet. Eine der beiden Elektroden kann auch geschlossen sein. The pressure transducer Tr is from the pressure p one in this example gaseous medium and transforms the pressure of a liquid into a Line or a vessel p1 in a pressure of a gaseous medium Pg, which on the closed space H is given and on the filling of the measuring electrode G and the comparison electrode V transmits. In the example, both electrodes are open drawn. One of the two electrodes can also be closed.

Claims (1)

PATENTANSPRUCH: Meßkette zur Messung der Wasserstoffionenkonzentration in Medien, die unter Uber- oder Unterdruck stehen und die zum Ausgleich dieses tSber- oder Unterdruckes unter einen geeignet gewählten Uber- oder Unterdruck gesetzt werden, dadurch gekennzeichnet, daß dieser Über-oder Unterdruck mittels eines in der Regel gasgesteuerten DruckwandLers erzeugbar ist. PATENT CLAIM: Electrode for measuring the hydrogen ion concentration in media that are under overpressure or underpressure and which are used to compensate for this excess pressure or negative pressure can be set under a suitably selected positive or negative pressure, characterized in that this overpressure or underpressure is usually by means of a gas-controlled pressure transducer can be generated.
DER9214A 1952-06-10 1952-06-10 Measurement arrangement for pH measurement in media that are under overpressure or underpressure Expired DE938276C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER9214A DE938276C (en) 1952-06-10 1952-06-10 Measurement arrangement for pH measurement in media that are under overpressure or underpressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER9214A DE938276C (en) 1952-06-10 1952-06-10 Measurement arrangement for pH measurement in media that are under overpressure or underpressure

Publications (1)

Publication Number Publication Date
DE938276C true DE938276C (en) 1956-01-26

Family

ID=7398068

Family Applications (1)

Application Number Title Priority Date Filing Date
DER9214A Expired DE938276C (en) 1952-06-10 1952-06-10 Measurement arrangement for pH measurement in media that are under overpressure or underpressure

Country Status (1)

Country Link
DE (1) DE938276C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1172448B (en) * 1960-07-21 1964-06-18 Univ Dresden Tech Pressure-resistant electrode for measuring electrochemical potentials

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1172448B (en) * 1960-07-21 1964-06-18 Univ Dresden Tech Pressure-resistant electrode for measuring electrochemical potentials

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