+

WO2003034001A2 - Dispositif de fixation d'un detecteur de ph - Google Patents

Dispositif de fixation d'un detecteur de ph Download PDF

Info

Publication number
WO2003034001A2
WO2003034001A2 PCT/EP2002/011450 EP0211450W WO03034001A2 WO 2003034001 A2 WO2003034001 A2 WO 2003034001A2 EP 0211450 W EP0211450 W EP 0211450W WO 03034001 A2 WO03034001 A2 WO 03034001A2
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
probe
liquid
liquid container
receiving device
Prior art date
Application number
PCT/EP2002/011450
Other languages
German (de)
English (en)
Other versions
WO2003034001A3 (fr
Inventor
Andreas Derr
Patrick Zahn
Original Assignee
Testo Gmbh & Co.
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 Testo Gmbh & Co. filed Critical Testo Gmbh & Co.
Publication of WO2003034001A2 publication Critical patent/WO2003034001A2/fr
Publication of WO2003034001A3 publication Critical patent/WO2003034001A3/fr

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
    • G01N27/28—Electrolytic cell components
    • G01N27/283—Means for supporting or introducing electrochemical probes

Definitions

  • the present invention relates to a recording device for a pH sensor for measuring the pH, in particular of liquids.
  • PH measuring devices or pH sensors are generally known in various embodiments, so that a description of their structure and mode of operation can be dispensed with. Such pH sensors are used, for example, to measure the pH of liquids or foods.
  • a pH sensor also includes a probe.
  • probes come e.g. B. glass electrodes for use. In particular when measuring the hydrogen ion concentration of liquids, these glass electrodes must have at least one oxidized swelling layer.
  • Source layers are continuous for hydrogen ions and allow charge shifts, which makes measurements of the pH possible.
  • the swelling layers typically consist of oxidized glass that has been softened by a prototelyte fluid.
  • its probe or the oxidized swelling layer applied to it must be constantly moistened with the protelyte liquid.
  • a storage container is provided in which the pH sensors can be placed during the measurement breaks.
  • Known receptacles consist of a container which is at least partially filled with the protelyte liquid and has an opening on its top for inserting the probe. So that the prototelyte fluid cannot leak when the probe is inserted, there is a cork-like plug in the opening with a central bore provided that serves to hold the shaft of the measuring probe.
  • the shaft of the measuring probe is typically formed not continuously cylindrical, but has often even at least two different diameters and tapers towards the measuring tip, wherein "a removal of the probe from the storage vessel, an adherent to the probe production not TELYT liquid residue or The protelyte residues can come into contact with the user. Although the protelyte liquid itself is not toxic, the sticky consistency of the user perceives it as bothersome and unpleasant If the decrease in fluid is not recognized, the risk increases that the swelling layer of the probe dries out and becomes inoperable.
  • the storage containers are often placed on some part of the shelf. Since the storage containers typically have a small footprint, there is an increased risk that they will be knocked over and leak. If this is not recognized immediately and a protelyte fluid is not immediately available, the measuring probes dry out. The same happens if the storage container is not completely filled with the prototelyte fluid. During transport, the tip of the measuring probe may not or only partially be washed around by the prototelyte liquid, which also increases the risk of drying out.
  • the probe is pulled out of the storage container for a measurement process. Since the stopper seals on Storage container and on the shaft of the probe, pulling out the probe creates a negative pressure in the container, which is transferred to the interior of the container via the sealing diaphragm. The resulting negative pressure in the container, which, among other things, makes it difficult to pull the probe out in a controlled manner, may cause prototele liquid to escape from the container, depending on the type of probe, which means that the life of the probe is shortened.
  • the measuring probe when the measuring probe is inserted into the container, there is an overpressure connected to the seal, which in turn is transferred to the inside of the container via the diaphragm. Since the diaphragm opening is surrounded by air, air bubbles can get into the interior of the container or at least into the diaphragm. Since it is essential for fast measurements that direct contact of the prototelyt liquid to the measuring liquid occurs, air bubbles on the tip of the measuring probe can lead to incorrect or slowed down measurements.
  • the object of the present invention is therefore to provide a receiving device with an improved leakage protection. Another object is to provide a recording device that maintains the function of the measuring probe.
  • a holding device for a pH sensor is provided, with a housing for holding the pH sensor, with a liquid container which is arranged in or attached to the housing and contains a liquid and which holds a sensor sensor or a probe of the pH sensor is used when a rest position is reached, with an outlet contactor that prevents liquid from getting out of the liquid container.
  • the leakage contactor according to the invention thus prevents a liquid residue adhering to the shaft of a probe, etc., from escaping from the receiving device during use, ie both when the probe is inserted and when the probe is removed. This largely prevents the probe or its tip from drying out.
  • a perforated membrane is advantageously provided as a leakage protection.
  • the perforated membrane preferably consist of an elastic material, for example of latex, rubber or a comparable elastic material. Due to the elasticity of the membrane material, the membrane hole widens when the probe is inserted and seals against the probe shaft. If the probe is pulled out of the container again for a measuring process, the liquid residues still adhering to the probe shaft are stripped off the elastic membrane and remain in the container.
  • a sponge which is arranged in the liquid container and is typically soaked with the liquid can also be provided as an outlet contactor.
  • the sponge prevents the liquid from leaking. This is particularly advantageous if the perforated membrane has lost its sealing function, for example due to improper handling.
  • the sponge largely prevents the liquid in the liquid container from sloshing around and the associated noises.
  • the receiving device has at least one wiping lip which wipes off a liquid film adhering to the shaft of the probe when the probe is led out of the housing.
  • the wiper lips also serve to center the probe when it is inserted into the container, thus preventing the perforated membrane from being accidentally destroyed.
  • two wiper lips each with a different inner diameter, are provided.
  • the wiper lips are preferably made of an elastic material, for example of rubber or latex.
  • the wiper lips are also made of a dimensionally stable material.
  • the housing or the probe can be inserted into the liquid container.
  • guide rails attached to the housing are provided.
  • the sensor sensor is centered by means of a perforated diaphragm, through which the probe can be inserted into the liquid container and thus prevents damage to the perforated membrane.
  • the wiping lip which is already present, can be used as the perforated diaphragm.
  • the receiving device can have a snap-in device which interacts with a snap-in device of the pH sensor in such a way that the pH sensor snaps into place when the rest position is reached and is thus fixed.
  • the receiving device is advantageously equipped with holding devices.
  • a belt clip is provided on the housing, which enables the holding device to be fastened to a belt, a piece of clothing, a metal sheet or another narrow object.
  • a wall bracket can be provided, by means of which the receiving device can be suspended on the wall, for example on a nail.
  • a storage solution that is customary for pH probes for example a protelyte solution, is typically used as the liquid.
  • a solution typically used is, for example, a potassium chloride solution.
  • a calibration solution which is suitable for calibrating the pH sensor when the probe or sensor sensor is immersed in the calibration solution. This enables a one-point calibration of the sensor directly in the receiving device.
  • the liquid container is exchangeably attached to the housing.
  • the liquid container is an integral part of the housing.
  • the liquid container has a base body, a base body cover with a central recess, which can be positively placed thereon, and a hollow cylindrical probe chamber.
  • the probe chamber is used to hold a probe and is immersed in the liquid solution on its underside. The top of the probe chamber is clamped or inserted into the lid and thus fixed.
  • the liquid container advantageously has a sealing device.
  • the sealing device can be designed, for example, as sealing lips which are attached in a ring shape on the cover or on the housing.
  • the cover can be sealed and fixed against the wall of the housing and / or the probe chamber via the sealing lips.
  • the liquid container has at least one compensation chamber at the level of the probe chamber, which prevents the liquid from escaping to the outside through the opening of the lid when the liquid container is turned over.
  • These compensation chambers are arranged between the probe chamber and the base wall and can be designed, for example, as risers. If the liquid container tips over or is turned over, the liquid flows into the riser pipe at the bottom and therefore does not escape to the outside via the probe chamber. This prevents the liquid from leaking.
  • the risers also serve to equalize the pressure in the base body when inserting and removing a probe from the base body.
  • the liquid container has at least one pressure relief valve and / or at least one vacuum pressure valve, which restore pressure equalization in the case of an overpressure or a vacuum in the liquid container.
  • the pressure / vacuum valves each have a plug on which a circumferential sealing lip is attached.
  • the sealing lips are in contact with the base body wall when there is no pressure. In the event of overpressure / underpressure, the sealing lips are raised from the base body wall and thus enable pressure equalization.
  • FIG. 1 shows the overall view of a recording device according to the invention for a pH sensor
  • FIG. 2 shows the liquid container of the receiving device according to the invention without a pH probe (a) and with an inserted pH probe (b);
  • FIG. 3 shows a second embodiment of the liquid container
  • Figure 4 shows a third, preferred embodiment of the liquid container
  • FIG. 5 shows two cross-sectional representations of a particularly advantageous embodiment of the liquid container corresponding to FIG. 4;
  • Figure 6 shows the liquid container according to Figure 5 in the upturned state
  • FIG. 7 shows a detailed view of a vacuum valve in the liquid container from FIG. 5;
  • FIG. 8 shows a detailed illustration of an overpressure valve in the liquid container from FIG. 5;
  • FIG. 9 shows a detailed illustration of the liquid container from FIG. 4 with the probe inserted.
  • FIG. 1 shows two side views and a cross-sectional view of a recording device according to the invention for a pH sensor.
  • the receiving device which is designated by reference numeral 1, consists of a housing 2 to which a liquid container 3, which will be described in detail below, is attached.
  • the housing 2 is used for recording or storage and holding of a pH sensor, not shown in FIG. 1.
  • the sensor is inserted vertically into the housing 2 from above, so that its probe or sensor sensor is immersed in the liquid container 3. So that the probe can dip into the liquid container 3 with pinpoint accuracy, 2 guide rails are attached inside the housing, which ensure a defined insertion of the sensor.
  • the receiving device 1 also has a belt clip 4 fastened to the housing 2 and two wall brackets 5, which are formed here as a recess in the housing 2.
  • FIG 2 shows a first embodiment of the liquid container 3 without pH probe (a) and with the pH probe (b) inserted.
  • the liquid container 3 is at least partially filled with a liquid 10 - for example a protelyte solution.
  • a perforated membrane 12, which covers the liquid 10 and is made of a preferably elastic material, is fastened to the inner walls 11 of the container 3.
  • a small, typically round hole 13 is punched out in the center of the membrane 12.
  • the membrane 12 serves as a leak protector to prevent the liquid 10 from leaking out of the container 3.
  • the container 3 has on its upper side a flange 14, via which it can be fastened to the housing 2 of the receiving device 1.
  • Figure 2 (b) shows the liquid container 3 with the probe 15 inserted.
  • the probe 15 is inserted through the membrane hole 13 so that its tip 16 is immersed in the liquid 10.
  • the membrane 12 is deformed downwards in the middle.
  • FIG. 3 shows a further development of the liquid container 3 corresponding to FIG. 2.
  • a sponge 17 is additionally arranged in the interior of the container.
  • the measuring tip 16 is inserted into the sponge 17 soaked with the liquid 10.
  • a wiper lip 18 is provided which has a hole 19 in its center.
  • the wiper lip 18 consists of a dimensionally stable len, but elastic material and serves to scrape liquid residues from the probe shaft.
  • the wiper lip 18 is arranged here above the actual perforated membrane 12, but can additionally or alternatively also be arranged below the perforated membrane 12. When arranged above the perforated membrane 12, the wiper lip 18 also serves to center the probe 15 and to protect the perforated membrane 12.
  • FIG. 4 shows a third, particularly advantageous exemplary embodiment of a liquid container 3, which additionally has means for compensating for an overpressure and underpressure in the container.
  • the liquid container consists of a base body 20 with a base plate 21. In the center of the base plate 21 there is a sponge 17 which is flushed with a liquid 10 and which is advantageously fastened to the base plate 21.
  • a typically hollow cylindrical probe chamber 22 is also arranged in the interior of the base body 20.
  • the probe caramer 22 serves to receive and center the probe 15.
  • a cover 23, which has a central recess 24, is positively placed on the base body 20.
  • the lid 23 is typically made of rubber or other elastic material.
  • FIG. 5 shows the base body 20 from FIG. 4 in a very advantageous embodiment.
  • FIG. 5 (a) shows a cross section of the base body 20 along the line AA and FIG. 5 (b) along the line BB.
  • the probe chamber 22 and the sponge 17 are in the central area richly arranged the base body 20.
  • risers 27 - four risers in the present case - are provided, which are arranged between the probe chamber 22 and the base wall.
  • FIG 6 shows the liquid container according to Figure 5 in the upturned state.
  • the liquid 10 When the container 3 tilts or turns over, the liquid 10 always flows into the lowermost riser 27 and thus does not reach the outside via the recess 24.
  • the risers 27 thus serve to protect the outlet from the container 3.
  • a vacuum valve is attached to the upper edge of the risers 27 (FIG. 7), via which a pressure equalization of the liquid container 3 with its surroundings can take place.
  • Each vacuum valve consists of a soft, cylindrical plug 28, which has a central bore in the form of a blind hole, and a riser pipe 27. In the example in FIG. 5, four plug 28 are provided, but it is also sufficient for the function of the pressure valve from if only a single plug 28 is provided.
  • a circumferential sealing lip 29 is located radially on a cylindrical plug 28. The sealing lip 29 lies against the outer wall 35 of a riser pipe 27 with a slight prestress and seals the riser pipe 27 in the depressurized state.
  • the plug 28 yields and easily detaches from the outer wall 35 of the base body 20. Air 40 is thus sucked into the interior of the liquid container 3 , which leads to the desired pressure equalization.
  • the plug 28 is part of the cover 23 and is in contact with the wall 35 of the risers 27 when the cover 23 is attached.
  • a pressure relief valve is also attached to the upper edge of the risers 27 (FIG. 8).
  • the pressure relief valve is designed like the vacuum relief valve and is essentially formed by a circumferential sealing lip 30 which lies radially outward and is attached to a stopper 31. If an overpressure builds up in the base body 20 due to the insertion of a probe 15 into the base body 20, the plug 28 yields and easily detaches from the inner wall 34 of the base body 20, as a result of which air 41 from the interior of the liquid container 3 can escape to the outside.
  • a further sealing device attached to the cover 23 is also provided (FIG. 4).
  • This sealing device consists of a web 25 projecting vertically into the interior of the probe chamber 22.
  • the web 25 is designed to be elastic and hollow-cylindrical.
  • a plurality of circular, circumferential sealing lips 26 are attached to the outer wall 36 of the web 25.
  • the liquid container 3 in FIGS. 4 and 9 also has two wiper lips 32, 33 in the central bore of the probe chamber 22.
  • the wiper lips 32, 33 each have a different inner diameter - corresponding to the outer diameter of the shaft of the inserted probe 15.
  • the invention is not restricted exclusively to the exemplary embodiments in FIGS. 1 to 9. Rather, the present invention can be implemented in a suitable manner in a variety of embodiments and modifications within the framework of professional action and knowledge.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Molecular Biology (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Measurement Of Radiation (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

Dispositif de fixation d'un détecteur de pH destiné à la mesure du pH, comprenant un boîtier pour le logement du détecteur, un récipient de liquide, disposé dans le boîtier ou agencé sur le boîtier, renfermant un liquide et servant au logement d'un capteur ou d'une sonde du détecteur de pH lorsqu'une position de repos est obtenue, ainsi que des moyens de protection contre le déversement, empêchant que du liquide s'écoule à l'extérieur dudit récipient.
PCT/EP2002/011450 2001-10-17 2002-10-14 Dispositif de fixation d'un detecteur de ph WO2003034001A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001151232 DE10151232B4 (de) 2001-10-17 2001-10-17 Aufnahmevorrichtung für einen pH-Sensor
DE10151232.5 2001-10-17

Publications (2)

Publication Number Publication Date
WO2003034001A2 true WO2003034001A2 (fr) 2003-04-24
WO2003034001A3 WO2003034001A3 (fr) 2003-12-11

Family

ID=7702782

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/011450 WO2003034001A2 (fr) 2001-10-17 2002-10-14 Dispositif de fixation d'un detecteur de ph

Country Status (2)

Country Link
DE (1) DE10151232B4 (fr)
WO (1) WO2003034001A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103080738A (zh) * 2010-07-01 2013-05-01 哈克兰格有限责任公司 具有运输容器的水质分析传感器盒
EP4368171A1 (fr) 2022-11-08 2024-05-15 Laboratorios Ern S.A. Solution orale de paracetamol

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11085894B2 (en) * 2019-02-22 2021-08-10 International Business Machines Corporation Sensor apparatus with liquid container and wiper

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8216206U1 (de) * 1982-10-14 Dipl.Ing. Ulrich Knick Elektronische Meßgeräte GmbH & Co, 1000 Berlin Köcher für Meßsonden, insbesondere pH-Meßelektroden
FR1566161A (fr) * 1967-05-08 1969-05-09
US4016063A (en) * 1975-08-06 1977-04-05 Desmond Arpad Radnoti Electrode shield
FR2429428A1 (fr) * 1978-06-19 1980-01-18 Instruments Sa Dispositif porteur de membranes actives destinees aux analyses biochimiques
US4473458A (en) * 1983-08-30 1984-09-25 Instrument Technology Incorporated Ion measuring device with self-contained storage of standardizing solution
JP2577981B2 (ja) * 1988-12-14 1997-02-05 株式会社堀場製作所 プロセス用イオン測定装置
US5198093A (en) * 1990-05-10 1993-03-30 Orion Research, Inc. pH and concentration meter
US5582696A (en) * 1994-05-31 1996-12-10 Health Craft International, Inc. Glucose level monitoring apparatus
DE4421062C2 (de) * 1994-06-16 1998-04-16 Prominent Dosiertechnik Gmbh Transport- und Lageranordnung für eine Elektrode und Verwendung dieser Anordnung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103080738A (zh) * 2010-07-01 2013-05-01 哈克兰格有限责任公司 具有运输容器的水质分析传感器盒
CN103080738B (zh) * 2010-07-01 2014-10-22 哈克兰格有限责任公司 具有运输容器的水质分析传感器盒
EP4368171A1 (fr) 2022-11-08 2024-05-15 Laboratorios Ern S.A. Solution orale de paracetamol

Also Published As

Publication number Publication date
WO2003034001A3 (fr) 2003-12-11
DE10151232A1 (de) 2003-05-08
DE10151232B4 (de) 2006-01-26

Similar Documents

Publication Publication Date Title
DE69524324T2 (de) Pipettierspitze
DE69314458T2 (de) Barriereüberzug
EP2363704B1 (fr) Unité de détection pouvant être calibrée pour récipients de réaction
DE112011104350B4 (de) Ein Schnellprüfgerät
DE102013101735A1 (de) Potentiometrische Sensorvorrichtung
WO2011066901A1 (fr) Dispositif de protection de capteur
DE19618514A1 (de) Meßbecher
EP3741396A1 (fr) Récipient à usages multiples permettant de fournir des lingettes doté d'une fonction de rafraîchissement de l'air
DE3929506A1 (de) Verfahren und vorrichtung zum messen des fluessigkeitsinhalts von geschlossenen fluessigkeitstanks
EP3169993B1 (fr) Ensemble d'électrodes de référence pour un capteur électrochimique et capteur électrochimique
WO2003034001A2 (fr) Dispositif de fixation d'un detecteur de ph
EP1542801B1 (fr) Dispositif permettant de determiner et d'afficher au moins une propriete physique, chimique ou biologique d'un liquide test
DE3411800A1 (de) Referenzsystem mit bezugselektrode fuer die analysen-messtechnik
EP0066699B1 (fr) Indicateur de pression différentielle, en particulier pour appareils médicaux
EP3611498A1 (fr) Dispositif de protection pour électrodes électrochimiques à jonction liquide
DE10112298B4 (de) Verwendung eines Messkammeraufsatzes für mehrfach verwendbare Chemo- und Biosensoren
EP2588849B1 (fr) Cartouche de capteur d'analyse de l'eau comportant un contenant de transport
DE4209872C2 (de) Vorrichtung zur Messung der Blutungszeit in vitro
DE102006016692B4 (de) Waage zur Wägung pharmazeutischer oder chemischer Erzeugnisse sowie Verwendung einer Vorrichtung mit einer derartigen Waage
CH684503A5 (de) Messkammer zur Messung der Gas- und/oder Dampfdurchlässigkeit von Prüflingen.
DE4416638C1 (de) Gerät zur Bestimmung der Flüssigkeitsaufnahme von Prüfkörpern
DE102022109454A1 (de) Testleckvorrichtung
DE10156227C1 (de) pH-Einstabmeßkette mit einem Diaphragma-Verschluß
DE10039487A1 (de) Prüfkörper, Verwendung eines solchen Prüfkörpers und Verfahren zur gravimetrischen Volumenkontrolle von Geräten zur Flüssigkeitsdosierung oder -pipettierung
DE102006018740B4 (de) Schutzvorrichtung für eine Taucharmatur

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): BR CN JP

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FR GB GR IE IT LU MC NL PT SE SK TR

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载