JPH02259460A - Pm measuring meter and preparation thereof - Google Patents
Pm measuring meter and preparation thereofInfo
- Publication number
- JPH02259460A JPH02259460A JP1080831A JP8083189A JPH02259460A JP H02259460 A JPH02259460 A JP H02259460A JP 1080831 A JP1080831 A JP 1080831A JP 8083189 A JP8083189 A JP 8083189A JP H02259460 A JPH02259460 A JP H02259460A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- glass
- function part
- support pipe
- measuring meter
- 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.)
- Pending
Links
- 239000011521 glass Substances 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 239000000919 ceramic Substances 0.000 claims abstract description 9
- 239000000758 substrate Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 3
- 238000001139 pH measurement Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract description 17
- 229910052697 platinum Inorganic materials 0.000 abstract description 8
- 230000003670 easy-to-clean Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 239000005373 porous glass Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、化学工業、医薬品工業、食品工業等の技術分
野で高温、高圧、腐蝕性環境の条件下で反応処理を遂行
するために使用されるグラスライニング製等の耐蝕性機
器と組合わせて内容液のｐｉ＋、すなわち水素イオン濃
度指数を測定するために機器内に挿入状態に装備される
ｐＨ測定計およびその製造法に関する。Detailed Description of the Invention (Industrial Application Field) The present invention can be used in technical fields such as the chemical industry, pharmaceutical industry, and food industry to carry out reaction treatments under conditions of high temperature, high pressure, and corrosive environments. The present invention relates to a pH measuring meter that is inserted into a device to measure pi+, that is, a hydrogen ion concentration index, of a liquid in combination with a corrosion-resistant device made of glass lining, etc., and a method for manufacturing the same.
（従来の技術）
この種の工業用ｐＨ測定計としては、機器内の苛酷な環
境条件に耐えるとともに撹拌に伴う液流動負荷に対する
機械的強度を有することが要求されるので、ガラス製の
実験室的ρ１１計は使用できず、機器と同様グラスライ
ニング製とすることが必要になる。(Prior art) This type of industrial pH measuring meter is required to withstand harsh environmental conditions inside the device and have mechanical strength to withstand the liquid flow load associated with stirring. A ρ11 meter cannot be used, and it must be made of glass-lined material like the equipment itself.
（ｉ）第２図は特公昭５２−３２２７４号に開示された
グラスライニング製ρ）！測定計の代表的１例を示し、
鋼製基体（ａ）上に絶縁性ライニングガラス層（ｂ）を
高温焼成により形成する際に、その表面部にガラス電極
（Ｃ）を、またガラス層（ｂ）中に白金等のその接続線
（ｄ）を同時に形成した測定計を機器内の測定液体（ｅ
）中に挿入する状態に装備し、基準電極（ｆ）との起電
力の差を機器外で高抵抗電圧針（６）で測定するように
なっている。(i) Figure 2 shows glass lining ρ) disclosed in Japanese Patent Publication No. 52-32274! A typical example of a measuring meter is shown,
When forming an insulating lining glass layer (b) on a steel substrate (a) by high-temperature firing, a glass electrode (C) is placed on the surface of the insulating lining glass layer (b), and a connection wire made of platinum or the like is placed in the glass layer (b). (d) is formed at the same time as the measurement liquid (e) inside the device.
), and the difference in electromotive force with the reference electrode (f) is measured with a high resistance voltage needle (6) outside the device.
また（ｉｉ）特公昭６１〜５３６５９号には、グラスラ
イニング製電極支持管の先端部に有機質材料のポリエチ
レン製のスリーブ等をはめあわせて電極部を分解可能に
組合わせたｐＨ測定計の他の１例が開示されている。In addition, (ii) Japanese Patent Publication No. 61-53659 discloses another pH measuring meter in which the tip of a glass-lined electrode support tube is fitted with a sleeve made of organic material such as polyethylene to make the electrode part removable. One example is disclosed.
（発明が解決しようとする課題）
化学工業用大型グラスライニング機器では、ｐＨ測定計
は定期的に電極を清浄にして検査し劣化している場合に
は電極を取替えることが必要になる。(Problems to be Solved by the Invention) In large-scale glass-lined equipment for the chemical industry, it is necessary to periodically clean and inspect the electrodes of pH meters, and to replace the electrodes if they have deteriorated.
ところが前記従来技術（ｉ）では、電極を交換するには
、長さ２ｍ余に及ぶグラスライニング類ｐ）ｌ測定計の
全体を取外して交換することが必要になる。However, in the prior art (i), in order to replace the electrodes, it is necessary to remove and replace the entire glass lining (p)l measuring meter, which is over 2 meters long.
またｐＨ測定計の電極構造は、測定用ガラス電極部、液
絡部のある比較電極部および補償用温度計を相互に絶縁
して設け、外部の計器に絶縁状態で電気接続を導く必要
があるので、組立式とするには複雑構造になるが、従来
技術ではライニングガラス層内に白金接続線を反覆高温
焼成施工の途中に埋込まねばならないので製作が困難で
あるとともに分離可能な構造にすることも困難になる。In addition, the electrode structure of the pH meter requires that the measurement glass electrode, the reference electrode with a liquid junction, and the compensation thermometer be insulated from each other, and electrical connections must be made in an insulated manner to external instruments. Therefore, it would be a complicated structure to make it into an assembly type, but with conventional technology, platinum connecting wires had to be embedded in the lining glass layer during repeated high-temperature firing construction, making it difficult to manufacture and making it separable. It also becomes difficult.
また、従来技術（ｉｉ）では、組立分解を可能としかつ
電気的絶縁ならびに接続が保たれるようにするために複
雑な多層構造としているので、高価となり、しかも接続
組立に有機質材料の使用を余儀無くされるので、その浸
透、膨潤、酸化および劣化が起こり、長期の耐熱、耐蝕
性が劣る。In addition, in conventional technology (ii), a complex multilayer structure is used to enable assembly and disassembly and maintain electrical insulation and connection, which is expensive and requires the use of organic materials for connection assembly. As a result, its permeation, swelling, oxidation and deterioration occur, resulting in poor long-term heat resistance and corrosion resistance.
本発明は従来技術の上記問題点に解決を与え、ｐ）ｌ測
定計として具備すべき要件、すなわち、耐圧、耐熱、耐
薬品性が優れ、ｐＨ測定のための各電極部が電気的に絶
縁されるとともに、外部接続に関し接続線の埋込み等の
必要がなく、電極機能部の着脱および交換を容易に行い
得るｐＨ測定計を提供することを課題とする。The present invention provides a solution to the above-mentioned problems of the prior art, and satisfies the requirements that a p) l measuring meter should have, that is, it has excellent pressure resistance, heat resistance, and chemical resistance, and each electrode part for pH measurement is electrically insulated. In addition, it is an object of the present invention to provide a pH measuring meter that does not require embedding of connection wires or the like regarding external connections, and allows easy attachment/detachment and replacement of the electrode function section.
（課題を解決するための手段）
前記の課題は、本発明によりｐｔｔ測定計を機器に装着
されるグラスライニング製電極支持管と電極機能部とに
より構成し、特に電極機能部は切削性を有するセラミッ
クス等を基体として結合部の形成によりグラスライニン
グ製電極支持管の先端への液シールを保っての機械的結
合を可能とするとともに、セラミックス基体上にｐ）ｌ
測定用各種電極の形成および各種電極の接続部の機械的
結合部内への形成を可能として、電極支持管内を通して
外部接続がなされるようにすることにより解決される。(Means for Solving the Problems) The above-mentioned problems are achieved by constructing a PTT measuring meter according to the present invention by a glass-lined electrode support tube and an electrode function part that are attached to the device, and in particular, the electrode function part has a cutting property. By forming a bonding part using ceramics as a base, it is possible to mechanically bond the tip of the glass-lined electrode support tube while maintaining a liquid seal, and also to form a bond on the ceramic base.
The problem is solved by making it possible to form the various electrodes for measurement and to form the connections of the various electrodes into the mechanical joint, so that the external connections are made through the electrode support tube.
（作用）
本発明によると、電気絶縁性を有し、化学的に安定であ
りしかも切削加工可能な切削性セラミックスを基体とし
、これにコーティングによりｐＨ測定用ガラス電極を形
成し、液絡管等を基体に加工して取付け、接続線を導き
、また機械的結合部を切削形成して一体の電極機能部と
するので、電極機能部をグラスライニング製電極支持管
の先端に着脱交換可能に装着することができる。また耐
圧機能および耐薬品性も保全される。(Function) According to the present invention, a machinable ceramic that is electrically insulating, chemically stable, and machinable is used as a base, and a glass electrode for pH measurement is formed by coating on this, and a liquid junction pipe, etc. The electrode is processed and attached to the base, the connecting wire is guided, and the mechanical connection part is cut and formed to form an integrated electrode function part, so the electrode function part is detachably attached to the tip of the glass-lined electrode support tube. can do. Also, pressure resistance and chemical resistance are maintained.
（実施例）
以下、本発明のｐ）ｌ測定計を第１図の実施例により一
層具体的に説明する。(Example) Hereinafter, the p)l measuring meter of the present invention will be explained in more detail with reference to the example shown in FIG.
このｐＨ測定計は、機器に装着されるグラスライニング
製電極支持管（１）の先端に電極機能部（２）を取付け
て構成される。電極支持管（１）は鋼管基体（３）の外
面から先端にねたりライニングガラス層（４）が施工さ
れ、先端中心に形成しためねじ孔（５）に電極機能部（
２）に形成したおねじ部（６）をねじ込んで画者間に挟
み込んだＯリング（７）により機器内の測定液体からシ
ールして取付けられる。This pH measuring meter is constructed by attaching an electrode function part (2) to the tip of a glass-lined electrode support tube (1) that is attached to the device. The electrode support tube (1) has a lining glass layer (4) applied from the outer surface of the steel tube base (3) to the tip, and an electrode function part (
The external threaded part (6) formed in 2) is screwed into the O-ring (7) which is inserted between the two to seal it from the liquid to be measured inside the device.
電極機能部（２）は切削性を有する結晶化ガラス、セラ
ミックス（例えば石原薬品株式会社製マコール、熱膨張
係数９４ｘｌＯ−”ｃ−’）等を基体（８）として、切
削加工により前記おねじ部（６）、中心の５ｆｒＩＩＩ
Ｊφの上部孔（９）、１０ｎｉｎφ中の下部孔００）が
形成される。この基体は電気絶縁性で化学的に安定であ
る。基体の切削性を利用する等して、ｐＨ測定のための
各種の電極および接続を組込んで一体の電極機能部（２
）とする。The electrode function part (2) uses a base material (8) of crystallized glass, ceramics (for example, Macol manufactured by Ishihara Pharmaceutical Co., Ltd., thermal expansion coefficient 94xlO-"c-'), etc., which has machinability, and the male thread part is formed by cutting. (6), 5frIII in the center
An upper hole (9) of Jφ and a lower hole (00) of 10 ninφ are formed. This substrate is electrically insulating and chemically stable. By utilizing the machinability of the base material, etc., various electrodes and connections for pH measurement are incorporated into an integrated electrode function section (2
).
電極機能部の電極構成を形成の順序に従って説明すると
次のとおりである。先ず、ステンレス鋼製の内部液用チ
ューブ（１０を下部孔００）から上部孔（９）に通して
取付け、また０、５−φＸ２００ｍｍＬの白金接続線（
１２）を通し、融着用ガラスを用いて基体（８）に融着
する。そして基体（８）の側面に露出した白金接続線部
分（１２’）に加熱硬化タイプの根ペーストを塗布し５
００°Ｃで一時間熱処理することにより白金線を仮止め
する。The electrode structure of the electrode functional part will be explained in the order of formation as follows. First, attach the stainless steel internal liquid tube (10 from the lower hole 00) to the upper hole (9), and also connect the 0.5-φ x 200 mmL platinum connecting wire (
12) and is fused to the substrate (8) using a fusion glass. Then, apply heat-curing type root paste to the platinum connection line portion (12') exposed on the side surface of the base (8).
The platinum wire is temporarily fixed by heat treatment at 00°C for one hour.
その上で、基体の側面上にｐＨ測定用電極を形成するた
め、１９ＮａｚＯ−６ＣａＯ−７５ＳｉＯｚ （ｍｏ１
％）の組成のガラスをるつぼに入れ、電気炉で溶解後、
象、冷および粉砕してグラスライニング用フリットをつ
くり、水と混合してスプレーガンで上記銀接続部上にコ
ーティングし、乾燥および電気炉焼成により、上記導電
性ガラス膜のｐ）Ｉ測定用電極０３）を形成する。Then, in order to form a pH measurement electrode on the side surface of the substrate, 19NazO-6CaO-75SiOz (mo1
%) is put into a crucible and melted in an electric furnace,
A frit for glass lining is prepared by heating, cooling and pulverizing, which is mixed with water and coated on the silver connection part using a spray gun, dried and fired in an electric furnace to form an electrode for measuring p)I of the conductive glass film. 03) is formed.
さらに液絡機能を有する多孔性ガラス（１４）を下部孔
００）の下端に高温焼ばめして取付ける。Further, a porous glass (14) having a liquid junction function is attached to the lower end of the lower hole 00 by high-temperature shrink fitting.
この電極機能部（２）を電極支持管（１）の先端に前記
のように取付けて結合し、電極支持管（１）の中空腔内
に臨む内部液用チューブ００の上端にワンタッチ式のコ
ネクター０５）を介し液絡管０６）を接続して中空腔内
を通して機器外に導出し、白金接続線ＱＺには外部リー
ド線Ｏ′７）を接続して導出し、外部の測定機器と接続
する。This electrode function part (2) is attached and connected to the tip of the electrode support tube (1) as described above, and a one-touch connector is attached to the upper end of the internal liquid tube 00 facing into the hollow cavity of the electrode support tube (1). 05), connect the liquid junction pipe 06) and lead it out of the device through the hollow cavity, connect the external lead wire O'7) to the platinum connecting wire QZ and lead it out, and connect it to an external measuring device. .
機器内溶液のｐＨをｐ）ｌ測定用電極側により測定する
には、液絡管０６）、内部液用チューブ（１１）を通し
て下部孔（１（１）内にＫＣｆ溶液の緩衝液を導入して
比較電極とする。To measure the pH of the solution inside the device using the p)l measurement electrode side, introduce the buffer of KCf solution into the lower hole (1 (1)) through the liquid junction pipe 06) and the internal liquid tube (11). and serve as a reference electrode.
この実施例では補償用温度計０８）は電極支持管（２）
の中空腔内に設置されているが、さらに鋭敏な補償用温
度計を電極機能部に組込んでもよい。In this embodiment, the compensation thermometer 08) is connected to the electrode support tube (2).
A more sensitive compensating thermometer may be incorporated into the electrode function.
上記の本発明のｐＨ測定計の確性試験の結果は次のとお
りである。The results of the accuracy test of the above pH meter of the present invention are as follows.
（１） ｐＨ測定テスト
市販の実験用ｐＨ測定装置を用い、本発明の電極機能部
と実験用電極との比較試験を、ｐＨ値が２．４．７、お
よび９の市販の緩衝溶液を用いて３０°Ｃで行った。(1) pH measurement test Using a commercially available experimental pH measuring device, a comparative test was conducted between the electrode function part of the present invention and an experimental electrode using commercially available buffer solutions with pH values of 2.4.7 and 9. The test was carried out at 30°C.
その結果、本発明の電極機能部は満足なｐＨ測定機能を
有することが確認された。As a result, it was confirmed that the electrode function section of the present invention had a satisfactory pH measurement function.
（ＩＩ）耐久性テスト
前記ｐＨ測定テストの温度３０゛Ｃに代わり６０″Ｃ１
８０°Ｃおよび９８°Ｃの条件下で同じテストを行った
。(II) Durability test The temperature of the above pH measurement test was 60"C1 instead of 30"C.
The same test was conducted under conditions of 80°C and 98°C.
その結果、温度変化に対してもｐＨ値は再現性良く測定
できることが判明した。As a result, it was found that pH values can be measured with good reproducibility even when the temperature changes.
さらに各温度において、半年間の連続測定試験を行った
結果、ｐＨ値の変化は僅かで劣化は認められなかった。Furthermore, as a result of conducting continuous measurement tests for six months at each temperature, there was only a slight change in the pH value and no deterioration was observed.
（Ｔｎ〕実機テスト
ＪＩＳ Ｒ４２０１に示された容量約１２０１のグラス
ライニング製開放タンクおよび長さ６００Ｍの電極支持
管に電極機能部を取付けた本発明ｐ）ｌ測定計を用いて
実機テストを行った。(Tn) Actual machine test An actual machine test was carried out using a glass-lined open tank with a capacity of approximately 1201 as shown in JIS R4201 and the p)l measuring meter of the present invention, which has an electrode function section attached to an electrode support tube with a length of 600M. .
前耐久性テストと同様に、半年間の連続測定テストを行
った結果、ｐＨ測定値の変化は僅かで劣化は認められな
かった。As in the previous durability test, as a result of conducting a continuous measurement test for half a year, there was only a slight change in the pH measurement value and no deterioration was observed.
（発明の効果）
以上のように、本発明によるｐＨ測定計は、工業用耐蝕
性機器の内容液のｐＨ測定用として、圧力、温度、温度
変化サイクル、機械的負荷に耐え、長い使用期間にわた
って満足な測定機能を発揮し、また電極機能部は節単に
着脱可能で、清掃、交換が容易であり、しかもｐＨ測定
計全体の構造を簡潔にできる。またその電極機能部は基
体と各種電極部との熱膨張係数を適合させて比較的容易
に製作することができ、製作コストが低い。(Effects of the Invention) As described above, the pH meter according to the present invention can withstand pressure, temperature, temperature change cycles, and mechanical loads, and can be used for measuring the pH of the liquid content of industrial corrosion-resistant equipment, and can be used for a long period of time. It exhibits a satisfactory measurement function, and the electrode function section is easily attachable and detachable, making it easy to clean and replace, and the overall structure of the pH measuring meter can be simplified. Further, the electrode function part can be manufactured relatively easily by matching the thermal expansion coefficients of the base body and various electrode parts, and the manufacturing cost is low.
第１図は本発明実施例のｐ）ｌ測定計の縦断側面図、第
２図は従来技術のｐｉ＋測定計の１例の縦断側面図であ
る。
（１）・・・電極支持管、（２）・・・電極機能部、（
３）・・・鋼管基体、（４）・・・ライニングガラス層
、（５）・・・めねし孔、（６）・・・おねじ部、（７
）・・・０リング、（８）・・・切削性セラ・ミックス
基体、（９）・・・上部孔、（１０）・・・下部孔、（
１１）・・・内部液用チューブ、０２）・・・白金接続
線、（１２’）・・・白金接続線部分、０３）・・・ｐ
Ｈ測定用電極、０４）・・・多孔性ガラス、θ０・・・
コネクター、００・・・液絡管、０７）・・・外部リー
ド線、００・・・補償温度計、（ａ）・・・鋼製基体、
（ｂ）・・・ライニングガラス層、（Ｃ）・・・ガラス
電極、（ｄ）・・・接続線、（ｅ）・・・測定液体、（
ｆ）・・・基準電極、（ｇ）・・・電圧計。FIG. 1 is a vertical side view of a p)l measuring meter according to an embodiment of the present invention, and FIG. 2 is a vertical side view of an example of a pi+ measuring meter of the prior art. (1)... Electrode support tube, (2)... Electrode function part, (
3) Steel pipe base, (4) Lining glass layer, (5) Female hole, (6) Male thread, (7
)...0 ring, (8)...cuttable ceramic mix substrate, (9)...upper hole, (10)...lower hole, (
11)...Internal liquid tube, 02)...Platinum connecting line, (12')...Platinum connecting line part, 03)...p
Electrode for H measurement, 04)... Porous glass, θ0...
Connector, 00... Liquid junction pipe, 07)... External lead wire, 00... Compensation thermometer, (a)... Steel base,
(b)...Lining glass layer, (C)...Glass electrode, (d)...Connection line, (e)...Measurement liquid, (
f)...Reference electrode, (g)...Voltmeter.
Claims (2)
入状態に装着されるグラスライニング製電極支持管の中
央開口を有する先端に対し、切削性セラミックス基体に
ｐＨ測定のための各種電極を形成した一体の電極機能部
を液シールを保って機械的に結合し、各種電極からの接
続部を前記中央開口に向かう電極機能部の部分に形成し
てグラスライニング製電極支持管内を通して前記接続部
を外部接続するようにしたことを特徴とするｐＨ測定計
。(1) In order to measure the pH of the liquid contained in the device, various electrodes for pH measurement are attached to the cuttable ceramic substrate at the tip with a central opening of a glass-lined electrode support tube that is inserted into the device. The integrated electrode functional part formed with the above is mechanically connected while maintaining a liquid seal, and the connection parts from various electrodes are formed in the part of the electrode functional part facing the central opening, and the connections are passed through the glass-lined electrode support tube. A pH measuring meter characterized in that a portion of the pH meter is externally connected.
定用ガラス電極をコーティングしてグラスライニング製
電極支持管との着脱可能な電極機能部を形成するｐＨ測
定計の製造法。(2) A method for manufacturing a pH measuring meter, in which a mounting portion and a glass electrode for pH measurement are coated on a machinable ceramic substrate to form an electrode functional portion that can be attached and detached from a glass-lined electrode support tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1080831A JPH02259460A (en) | 1989-03-30 | 1989-03-30 | Pm measuring meter and preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1080831A JPH02259460A (en) | 1989-03-30 | 1989-03-30 | Pm measuring meter and preparation thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02259460A true JPH02259460A (en) | 1990-10-22 |
Family
ID=13729351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1080831A Pending JPH02259460A (en) | 1989-03-30 | 1989-03-30 | Pm measuring meter and preparation thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02259460A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5141590A (en) * | 1974-10-04 | 1976-04-07 | Horiba Ltd | Ph sokuteiyofukugodenkyoku |
| JPS5232274A (en) * | 1975-09-05 | 1977-03-11 | Kokusai Electric Co Ltd | Equipment to mount ic on measurement socket |
| JPS6153659A (en) * | 1984-08-24 | 1986-03-17 | Fuji Xerox Co Ltd | Contact developing method using insulating nonmagnetic one-component developer |
-
1989
- 1989-03-30 JP JP1080831A patent/JPH02259460A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5141590A (en) * | 1974-10-04 | 1976-04-07 | Horiba Ltd | Ph sokuteiyofukugodenkyoku |
| JPS5232274A (en) * | 1975-09-05 | 1977-03-11 | Kokusai Electric Co Ltd | Equipment to mount ic on measurement socket |
| JPS6153659A (en) * | 1984-08-24 | 1986-03-17 | Fuji Xerox Co Ltd | Contact developing method using insulating nonmagnetic one-component developer |
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