JPH0543988B2 - - Google Patents
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- Publication number
- JPH0543988B2 JPH0543988B2 JP8636188A JP8636188A JPH0543988B2 JP H0543988 B2 JPH0543988 B2 JP H0543988B2 JP 8636188 A JP8636188 A JP 8636188A JP 8636188 A JP8636188 A JP 8636188A JP H0543988 B2 JPH0543988 B2 JP H0543988B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- conductivity
- fluid
- space
- measured
- 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.)
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- 239000012530 fluid Substances 0.000 claims description 28
- 238000005259 measurement Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 5
- 239000008235 industrial water Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は複数の電極を持つ電極棒と泡抜き孔を
有するセル外筒との間に円筒状の被測定流体空間
を形成し前記空間の流体の導電率を測定する導電
率測定用の電極に関する。Detailed Description of the Invention (Industrial Field of Application) The present invention forms a cylindrical fluid space to be measured between an electrode rod having a plurality of electrodes and a cell outer cylinder having a bubble removal hole. The present invention relates to an electrode for measuring conductivity that measures the conductivity of a fluid.
本発明による前記電極は工業用水や汚水等の導
電率を投げ込み形や流通形で測定するのに適して
いる。 The electrode according to the present invention is suitable for measuring the conductivity of industrial water, sewage, etc. in an immersion type or a flow type.
（従来の技術）
液体の導電率を測定する電極として、複数の電
極を持つ電極棒と泡抜き孔を有するセル外筒との
間に円筒状の被測定流体空間を形成し前記空間の
流体の導電率を測定する電極が知られている。(Prior art) As an electrode for measuring the conductivity of a liquid, a cylindrical fluid space to be measured is formed between an electrode rod having a plurality of electrodes and a cell outer cylinder having a bubble removal hole, and the fluid in the space is Electrodes for measuring conductivity are known.
第５図は従来の導電率測定用の電極を一部破断
して示した図である。 FIG. 5 is a partially cutaway view of a conventional conductivity measuring electrode.
第６図は、前記従来の導電率測定用の電極の等
価回路図である。 FIG. 6 is an equivalent circuit diagram of the conventional electrode for measuring conductivity.
基部１０に絶縁筒１８，１９と電極からな
る電極棒９が一体に設けられている。 An electrode rod 9 consisting of insulating cylinders 18 and 19 and an electrode is integrally provided on the base 10.
電極は、第６図に示されているように、内
部でケーブル１１に接続され、測定用の交流電源
電圧が供給され、被測定流体を通過した電流は電
流測定手段Ａにより測定される。 The electrodes are internally connected to a cable 11, as shown in FIG. 6, and supplied with an AC power supply voltage for measurement, and the current passing through the fluid to be measured is measured by current measuring means A.
基部１０にはセル外筒１２がねじ結合されてお
り、セル外筒１２の基部よりには比較的小径の泡
抜き孔２０ａ，２０ｂ，２０ｃ，２０ｄ、セル外
筒１２の開放端よりに比較的大きい径の泡抜き孔
２１ａ，２１ｂ，２１ｃ，２１ｄが設けられてい
る。 A cell outer cylinder 12 is screwed to the base 10, and there are relatively small diameter bubble vent holes 20a, 20b, 20c, 20d at the base of the cell outer cylinder 12, and relatively small diameter holes at the open end of the cell outer cylinder 12. Large-diameter bubble removal holes 21a, 21b, 21c, and 21d are provided.
導電率は電気の通りやすさを示すものであるか
ら、導電率測定とはこれと逆数関係にある抵抗値
を測定することにほかならない。 Electrical conductivity indicates the ease with which electricity can pass through, so measuring electrical conductivity is nothing but measuring the resistance value, which is inversely related to this.
流体の抵抗測定は、二つの電極間に流体が
常に一定の形状、この例では円筒状、に満たされ
るようにして行う。 Fluid resistance measurement is performed by filling the space between two electrodes with fluid in a constant shape, a cylinder in this example.
一定の形に満たされた流体の長さ（２つの電極
間の距離）をｌ、断面積をＳとすれば、抵抗
Ｒはｌに比例し、Ｓに逆比例するから、これらの
関係はつぎのようになる。 If the length of a fluid filled in a certain shape (distance between two electrodes) is l, and the cross-sectional area is S, the resistance R is proportional to l and inversely proportional to S, so the relationship between these is as follows. It becomes like this.
Ｒ＝ρ・（ｌ／Ｓ） ……(1)
比例定数ρは抵抗率と呼ばれるもので、導電率
Ｌとは逆数関係にあるから、これを用いると式(1)
は次のようになる。 R=ρ・(l/S) ……(1) The proportionality constant ρ is called resistivity and has a reciprocal relationship with the conductivity L, so using this, formula (1)
becomes as follows.
Ｒ＝（１／Ｌ）・（ｌ／Ｓ） ……(2)
導電率測定とはこの導電率Ｌを求めることであ
り、ｌ＝１cm、Ｓ＝１cm2の形にした流体の電気の
通りやすさを測定することである。 R=(1/L)・(l/S) ……(2) Conductivity measurement means finding this conductivity L, which is the electric conductivity of the fluid in the form of l=1cm and S= 1cm2 . It is to measure ease.
またｌ／Ｓはセル定数と呼ばれＪ（１／cm）で
表される導電率セル固有の値であり、形状寸法か
ら定まるものである。実際には導電率Ｌが既知の
流体（標準液）を測定したときの抵抗値Ｒと、そ
のＬから式(2)の関係を用いて算出する。 Further, l/S is called a cell constant and is a value specific to the conductivity cell expressed in J (1/cm), and is determined from the shape and dimensions. Actually, it is calculated from the resistance value R when a fluid (standard solution) whose conductivity L is known and the relationship of equation (2) is used from that value L.
（発明が解決しようとする課題）
第５図に示した前記電極は、実験室的な用途で
はなく、工業用水や汚水等の導電率を投げ込み形
や流通形で測定するための電極として開発された
ものである。(Problems to be Solved by the Invention) The electrode shown in Fig. 5 was developed not for laboratory use, but as an electrode for measuring the conductivity of industrial water, sewage, etc., using an immersion type or a flow type. It is something that
流動する液体や、タンクの中では気泡が発生す
るおそれがあり、その気泡が前記測定空間に混入
すると正しい測定ができなくなる。前記測定空間
に混入した気泡を放出するために泡抜き孔を設け
てある。 Bubbles may be generated in the flowing liquid or in the tank, and if the bubbles enter the measurement space, correct measurement will not be possible. A bubble vent hole is provided to release bubbles that have entered the measurement space.
しかしながら、従来の泡抜き孔は殆ど満足に機
能しておらず、劣悪な環境では、泡を含む流体の
抵抗を測定してしまうというようなことがしばし
ばみられた。 However, conventional bubble removal holes hardly function satisfactorily, and in poor environments, it has often been observed that the resistance of fluid containing bubbles is measured.
気泡を放出する目的からはこの孔は大きい方が
好ましい。 For the purpose of releasing air bubbles, it is preferable that the pores be large.
第６図は、前記従来の導電率測定用の電極の等
価回路図である。 FIG. 6 is an equivalent circuit diagram of the conventional electrode for measuring conductivity.
本来、セル外筒１２内で前記電極間に発生
する円筒状の流体の電気抵抗Ｒ１２のみが測定の
対象である。 Originally, only the electrical resistance R12 of the cylindrical fluid generated between the electrodes within the cell outer cylinder 12 is to be measured.
しかし、泡抜き孔および開放端の開口部を介し
て外部の流体にも電流が流れ、その結果前述した
抵抗Ｒ１２に対してRhとRextの直列回路が並列
に接続されることになる。 However, current also flows through the external fluid through the bubble vent hole and the opening at the open end, and as a result, the series circuit of Rh and Rext is connected in parallel to the aforementioned resistor R12.
ただし、Rhは電極２から、基部の泡抜き孔２
０ａ，２０ｂ，２０ｃ，２０ｄの外側までの抵
抗、Rextは前記基部の泡抜き孔２０ａ，２０ｂ，
２０ｃ，２０ｄの外側から電極まで、主として
セル外筒１２の外側に形成される抵抗値である。 However, Rh is from electrode 2 to bubble release hole 2 at the base.
The resistance to the outside of 0a, 20b, 20c, 20d, Rext is the bubble removal hole 20a, 20b,
This is the resistance value formed mainly on the outside of the cell outer cylinder 12 from the outside of the cells 20c and 20d to the electrode.
このセル外筒１２の外側に形成される抵抗
Rextは、セル外筒１２が配置される位置や、外
部の電界分布等により変化する。 Resistance formed on the outside of this cell outer cylinder 12
Rext changes depending on the position where the cell outer cylinder 12 is arranged, the external electric field distribution, etc.
例えば電極がタンクの金属性の容器に近接して
配置されると抵抗Rextが小さくなるであろうこ
とは容易に理解できる。 For example, it is easy to understand that the resistance Rext will be smaller if the electrode is placed closer to the metallic container of the tank.
そのため、この抵抗Rextの影響を少なくする
ために、基部の泡抜き孔２０ａ，２０ｂ，２０
ｃ，２０ｄの径を小さくしてRhを小さく保つ必
要がある。 Therefore, in order to reduce the influence of this resistance Rext, the bubble vent holes 20a, 20b, 20 at the base are
It is necessary to keep Rh small by reducing the diameters of c and 20d.
しかし、このRhを小さくすると気泡が抜けに
くくなり、気泡の発生しやすい環境での使用を困
難にしている。 However, if Rh is reduced, it becomes difficult for air bubbles to escape, making it difficult to use in environments where air bubbles are likely to occur.
本発明の目的は、泡を抜け易くして工業用水や
汚水等の導電率を投げ込み形や流通形で測定する
のに適した導電率測定用の電極を提供することに
ある。 An object of the present invention is to provide an electrode for conductivity measurement that allows bubbles to escape easily and is suitable for measuring the conductivity of industrial water, sewage, etc. in an immersion type or a flow type.
（課題を解決するための手段）
前記目的を達成するために本発明による導電率
測定用の電極は、複数の電極を軸方向に配列した
電極棒と泡抜き孔を有するセル外筒との間に円筒
状の被測定流体空間を形成し前記空間の流体の導
電率を測定する導電率測定用の電極において、前
記電極棒の基部よりの前記円筒状の被測定流体空
間に連続する円筒状の空間の厚さを他の部分より
小さくし、その部分に前記厚さ相当またはより大
きな径の泡抜き孔を形成して構成されている。(Means for Solving the Problems) In order to achieve the above object, an electrode for measuring conductivity according to the present invention is provided between an electrode rod having a plurality of electrodes arranged in the axial direction and a cell outer cylinder having a bubble removal hole. In an electrode for measuring conductivity, which forms a cylindrical fluid space to be measured and measures the electrical conductivity of the fluid in the space, a cylindrical fluid space connected from the base of the electrode rod to the cylindrical fluid space to be measured is provided. The thickness of the space is made smaller than other parts, and a bubble vent hole with a diameter equivalent to or larger than the thickness is formed in that part.
（実施例）
以下、図面等を参照して本発明をさらに詳しく
説明する。(Example) Hereinafter, the present invention will be described in more detail with reference to the drawings and the like.
第１図は、本発明による導電率測定用の電極を
一部破断して示した図である。 FIG. 1 is a partially cutaway view of an electrode for measuring conductivity according to the present invention.
円板状の電極、絶縁筒１７、円筒状の電極
と段付きの絶縁筒１６により電極棒９が形成され
ている。 The electrode rod 9 is formed by a disc-shaped electrode, an insulating tube 17, a cylindrical electrode, and a stepped insulating tube 16.
この電極棒は、段付きの絶縁筒１６の基部より
に設けられているねじにより、基部１０のめねじ
に結合されている。 This electrode rod is coupled to the female thread of the base 10 by a screw provided at the base of the stepped insulating cylinder 16.
電極にはケーブル１１を介して既知の交流
電圧が供給されている。 The electrodes are supplied with a known alternating voltage via a cable 11.
また電極間を流れる電流は第４図に示す電流検
出手段Ａにより検出される。 Further, the current flowing between the electrodes is detected by current detection means A shown in FIG.
セル外筒１２は基部に設けられためねじにより
段付きの絶縁筒１６の基部よりに設けられている
ねじに結合されている。 The cell outer cylinder 12 is connected to a screw provided at the base of the stepped insulating cylinder 16 by an internal thread provided at the base.
セル外筒１２の基部よりに、４個の泡抜き孔１
３ａ，１３ｂ，１３ｃ，１３ｄ、開放端よりに同
様に４個の泡抜き孔１４ａ，１４ｂ，１４ｃ，１
４ｄが設けられている。 Four bubble vent holes 1 are provided at the base of the cell outer cylinder 12.
3a, 13b, 13c, 13d, similarly four bubble vent holes 14a, 14b, 14c, 1 from the open end.
4d is provided.
第２図は前記実施例の基部の泡抜き孔の部分を
切断して示した拡大断面図である。 FIG. 2 is an enlarged cross-sectional view showing the bubble vent hole in the base of the embodiment.
第３図は、前記実施例の基部の拡大図である。 FIG. 3 is an enlarged view of the base of the embodiment.
絶縁筒１７の半径をr1、段付き絶縁筒１６の大
径部の半径をr2、セル外筒１２の内径をr3とし、
泡抜き孔１３ａ，１３ｂ，１３ｃ，１３ｄの直径
をｄとする。 The radius of the insulating cylinder 17 is r 1 , the radius of the large diameter part of the stepped insulating cylinder 16 is r 2 , the inner diameter of the cell outer cylinder 12 is r 3 ,
Let d be the diameter of the bubble removal holes 13a, 13b, 13c, and 13d.
この実施例において被測定流体空間の断面積
（前記(1)式に示したＳ）は、
Ｓ＝π（r3 2−r1 2）で与えられる。 In this embodiment, the cross-sectional area of the fluid space to be measured (S shown in equation (1) above) is given by S=π(r 3 2 −r 1 2 ).
電極棒９の基部よりの前記円筒状の被測定流体
空間に連続する円筒状の空間の厚さ（r3−r2）
は、被測定流体空間の厚さ（r3−r1）より小さく
なつている。 Thickness of the cylindrical space continuous from the base of the electrode rod 9 to the cylindrical fluid space to be measured (r 3 −r 2 )
is smaller than the thickness (r 3 −r 1 ) of the fluid space to be measured.
そして泡抜き孔１３ａ，１３ｂ，１３ｃ，１３
ｄの直径ｄは、前記基部よりの前記円筒状の被測
定流体空間に連続する円筒状の空間の厚さ（r3−
r2）より十分に大きくしてある。 And bubble removal holes 13a, 13b, 13c, 13
The diameter d of d is the thickness (r 3 −
r2 ).
この実施例電極は通常、セル外筒１２の開口部
を下側にして被測定流体に投入される。 The electrode of this embodiment is normally inserted into the fluid to be measured with the opening of the cell outer cylinder 12 facing downward.
セル外筒１２内の被測定流体空間に混入した気
泡の直径が、前述した円筒状の空間の厚さ（r3−
r2）より大きいときは、気泡は偏平な形状になり
上昇し、いずれかの泡抜き孔１３ａ，１３ｂ，１
３ｃ，１３ｄからするりと抜け出る。 The diameter of the bubbles mixed into the fluid space to be measured in the cell outer cylinder 12 is determined by the thickness of the cylindrical space (r 3 −
r 2 ), the bubbles take on a flat shape and rise, leaving either the bubble removal holes 13a, 13b, 1
Smoothly slip out from 3c and 13d.
第５図に示した従来の電極では、泡抜き孔２０
ａ等の直径より大きな径の泡は内部にとどまり殆
ど抜け出ることはない。 In the conventional electrode shown in FIG.
Bubbles with a diameter larger than the diameter such as a remain inside and hardly come out.
本件発明者等は、円筒状の空間の厚さ（r3−
r2）と泡抜き孔の直径ｄが相対的に大きさの異な
る透明なセル外筒１２を有する種々の電極を用意
して、実験を行つた。 The inventors have determined that the thickness of the cylindrical space (r 3 −
Experiments were conducted using various electrodes having transparent cell outer tubes 12 having relatively different sizes in terms of r 2 ) and the diameter d of the bubble removal hole.
その結果ｄが（r3−r2）と略同等かそれよりも
大きいときは、泡は極めて良く抜けることが確認
された。 As a result, it was confirmed that when d is approximately equal to or larger than (r 3 −r 2 ), bubbles can be removed extremely well.
第４図は、前記実施例の等価回路図である。 FIG. 4 is an equivalent circuit diagram of the embodiment.
図において、Rintはセル外筒１２内で電極
から、泡抜き孔１３ａ，１３ｂ，１３ｃ，１３ｄ
にいたるまでの流体の抵抗値である。 In the figure, Rint is located inside the cell outer cylinder 12 from the electrode to the bubble vent holes 13a, 13b, 13c, 13d.
This is the resistance value of the fluid up to .
またRextは、泡抜き孔１３ａ，１３ｂ，１３
ｃ，１３ｄからセル外筒１２の外側を通り電極
に到達するまでの流体に形成される抵抗である。 In addition, Rext has bubble removal holes 13a, 13b, 13
This is the resistance formed in the fluid from c and 13d to the outside of the cell outer cylinder 12 and reaching the electrode.
このRextは前述したように変動し得る抵抗値
である。 This Rext is a resistance value that can vary as described above.
この２電極形の導電率測定用の電極では前述し
たRintはＲ１２に対してかなり高い抵抗値とな
り変動するRextに流れる電流を低く制限する。 In this two-electrode type electrode for measuring conductivity, the aforementioned Rint has a considerably high resistance value with respect to R12, and the current flowing through the fluctuating Rext is limited to a low value.
（変形例）
以上詳しく説明した実施例について本発明の範
囲内で種々の変形を施すことができる。(Modifications) Various modifications can be made to the embodiments described in detail above within the scope of the present invention.
前記実施例では泡抜き孔として、直径がｄであ
る円状のものを示したが、この形状は厳密に円で
なくても楕円とか、４辺形に近い形状であつても
良い。 In the above embodiment, the bubble removal hole is circular with a diameter of d, but this shape does not have to be strictly circular, but may be an ellipse or a shape close to a quadrilateral.
本発明において、泡抜き孔の径とは、楕円と
か、４辺形に近い形状を略等面積の円にしたとき
のその円の径程度と理解されたい。 In the present invention, the diameter of the bubble removal hole should be understood as the diameter of a circle with approximately equal area when an ellipse or a quadrilateral shape is formed.
また実施例として、基部に４個の泡抜き孔が設
けられている例を示したが、この個数も適宜変更
し得るものである。 Moreover, as an example, an example in which four bubble removal holes are provided in the base is shown, but this number can also be changed as appropriate.
また実施例として２電極形の例を示したが、棒
状の電極を有する３、４、５電極形のものにも適
用し得る。泡が抜けやすくなる点において、前述
したところと変わらない。 Furthermore, although a two-electrode type example has been shown as an example, the present invention can also be applied to three-, four-, or five-electrode types having rod-shaped electrodes. It is the same as described above in that the bubbles come out easily.
（発明の効果）
以上詳しく説明したように本発明による導電率
測定用の電極は、電極棒の基部よりの前記円筒状
の被測定流体空間に連続する円筒状の空間の厚さ
を他の部分より小さくし、その部分に前記厚さ相
当またはより大きな径の泡抜き孔を形成してある
ので、セル外筒に混入した気泡を簡単に抜くこと
ができる。(Effects of the Invention) As explained in detail above, the electrode for conductivity measurement according to the present invention has a thickness of the cylindrical space that is continuous with the cylindrical fluid space to be measured from the base of the electrode rod. Since it is made smaller and a bubble removal hole with a diameter equivalent to or larger than the above-mentioned thickness is formed in that part, air bubbles mixed in the cell outer cylinder can be easily removed.
したがつて、従来は困難とされている劣悪な環
境での工業用水や汚水の測定を確実に行うことが
できる。 Therefore, it is possible to reliably measure industrial water and wastewater in harsh environments, which has been difficult in the past.
第１図は、本発明による導電率測定用の電極を
一部破断して示した図である。第２図は前記実施
例の基部の泡抜き孔の部分を切断して示した拡大
断面図である。第３図は、前記実施例の基部の拡
大図である。第４図は、前記実施例の等価回路図
である。第５図は従来の導電率測定用の電極を一
部破断して示した図である。第６図は、前記従来
の導電率測定用の電極の等価回路図である。
，…電極、９…電極棒、１０…基部、１１
…ケーブル、１２…セル外筒、１３ａ，１３ｂ，
１３ｃ，１３ｄ…泡抜き孔、１４ａ，１４ｂ，１
４ｃ，１４ｄ…泡抜き孔、１６，１７，１８，１
９…絶縁筒、２０ａ，２０ｂ，２０ｃ，２０ｄ…
泡抜き孔、２１ａ，２２ｂ，２３ｃ，２４ｄ…泡
抜き孔、Ａ…電流検出手段、Ｖ…電圧検出手段。
FIG. 1 is a partially cutaway view of an electrode for measuring conductivity according to the present invention. FIG. 2 is an enlarged cross-sectional view showing the bubble vent hole in the base of the embodiment. FIG. 3 is an enlarged view of the base of the embodiment. FIG. 4 is an equivalent circuit diagram of the embodiment. FIG. 5 is a partially cutaway view of a conventional conductivity measuring electrode. FIG. 6 is an equivalent circuit diagram of the conventional electrode for measuring conductivity. ,...electrode, 9...electrode rod, 10...base, 11
...Cable, 12...Cell outer cylinder, 13a, 13b,
13c, 13d...bubble release hole, 14a, 14b, 1
4c, 14d...bubble release hole, 16, 17, 18, 1
9...Insulating tube, 20a, 20b, 20c, 20d...
Bubble vent holes, 21a, 22b, 23c, 24d...Bubble vent holes, A...Current detection means, V...Voltage detection means.
Claims (1)
き孔を有するセル外筒との間に円筒状の被測定流
体空間を形成し前記空間の流体の導電率を測定す
る導電率測定用の電極において、 前記電極棒の基部よりの前記円筒状の被測定流
体空間に連続する円筒状の空間の厚さを他の部分
より小さくし、 その部分に前記厚さ相当またはより大きな径の
泡抜き孔を形成して構成したことを特徴とする導
電率測定用の電極。[Claims] 1. A cylindrical fluid space to be measured is formed between an electrode rod in which a plurality of electrodes are arranged in the axial direction and a cell outer cylinder having a bubble removal hole, and the conductivity of the fluid in the space is measured. In an electrode for conductivity measurement, the thickness of the cylindrical space continuous with the cylindrical fluid space to be measured from the base of the electrode rod is made smaller than other parts, and the thickness of that part is equivalent to or equal to the thickness. An electrode for measuring conductivity characterized by having a larger diameter bubble release hole formed therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8636188A JPH01259249A (en) | 1988-04-08 | 1988-04-08 | Electrode for conductivity measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8636188A JPH01259249A (en) | 1988-04-08 | 1988-04-08 | Electrode for conductivity measurement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01259249A JPH01259249A (en) | 1989-10-16 |
| JPH0543988B2 true JPH0543988B2 (en) | 1993-07-05 |
Family
ID=13884745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8636188A Granted JPH01259249A (en) | 1988-04-08 | 1988-04-08 | Electrode for conductivity measurement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01259249A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111157587A (en) * | 2019-12-30 | 2020-05-15 | 中国人民解放军军事科学院国防科技创新研究院 | Conductivity sensor for microgravity environment |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002296312A (en) * | 2001-04-02 | 2002-10-09 | Samson Co Ltd | Electric conductivity sensor |
| JP2009020063A (en) * | 2007-07-13 | 2009-01-29 | Saginomiya Seisakusho Inc | Resistivity meter electrode |
| JP7277724B2 (en) * | 2019-03-28 | 2023-05-19 | 東亜ディーケーケー株式会社 | electrical conductivity cell |
-
1988
- 1988-04-08 JP JP8636188A patent/JPH01259249A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111157587A (en) * | 2019-12-30 | 2020-05-15 | 中国人民解放军军事科学院国防科技创新研究院 | Conductivity sensor for microgravity environment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01259249A (en) | 1989-10-16 |
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