JPH0560547B2 - - Google Patents
Info
- Publication number
- JPH0560547B2 JPH0560547B2 JP61050597A JP5059786A JPH0560547B2 JP H0560547 B2 JPH0560547 B2 JP H0560547B2 JP 61050597 A JP61050597 A JP 61050597A JP 5059786 A JP5059786 A JP 5059786A JP H0560547 B2 JPH0560547 B2 JP H0560547B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- silver
- gas sensor
- solid electrolyte
- conductive solid
- 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 - Fee Related
Links
- 238000005259 measurement Methods 0.000 claims description 21
- 239000007784 solid electrolyte Substances 0.000 claims description 17
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 claims description 14
- 229910052709 silver Inorganic materials 0.000 claims description 11
- 239000004332 silver Substances 0.000 claims description 11
- -1 silver halide Chemical class 0.000 claims description 10
- 239000003792 electrolyte Substances 0.000 claims description 8
- 229910052736 halogen Inorganic materials 0.000 claims description 8
- 150000002367 halogens Chemical class 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 229910021607 Silver chloride Inorganic materials 0.000 claims description 2
- 229910052731 fluorine Inorganic materials 0.000 claims description 2
- 239000011737 fluorine Substances 0.000 claims description 2
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 claims description 2
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims description 2
- REYHXKZHIMGNSE-UHFFFAOYSA-M silver monofluoride Chemical compound [F-].[Ag+] REYHXKZHIMGNSE-UHFFFAOYSA-M 0.000 claims description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims 1
- 229910052794 bromium Inorganic materials 0.000 claims 1
- 229940096017 silver fluoride Drugs 0.000 claims 1
- 239000007789 gas Substances 0.000 description 55
- 238000001514 detection method Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical group [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910021608 Silver(I) fluoride Inorganic materials 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
Landscapes
- Measuring Oxygen Concentration In Cells (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、ハロゲンガス及びハロゲン含有ガ
スを検出するガスセンサーに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a gas sensor that detects halogen gas and halogen-containing gas.
一般に、SF6等の絶縁ガスが封入された密封容
器の中に電気機器を収納したガス絶縁電気機器
は、内部放電が発生すると封入した絶縁ガスが分
解する。この分解ガスの生成を検出することによ
つてガス絶縁電気機器の運転状態を監視するため
に、種々の分解ガス検出方法や検出装置が用いら
れており、それを大別すれば湿式法と乾式法があ
る。
Generally, in gas-insulated electrical equipment in which electrical equipment is housed in a sealed container filled with an insulating gas such as SF 6 , the enclosed insulating gas decomposes when internal discharge occurs. Various decomposed gas detection methods and detection devices are used to monitor the operating status of gas-insulated electrical equipment by detecting the generation of decomposed gas, and they can be roughly divided into wet methods and dry methods. There is a law.
湿式法には、例えば放電によつてSF6ガスから
分解されたSF4等のガスをアルカリ性吸収液に吸
収させ、吸収されたフツ素イオンを吸光光度法で
測定する方法（IEC規格480）、又は分解ガスを酸
分として含む水溶液を標準硫酸水溶液で逆滴定し
て測定する方法（IEC規格376）などがある。 Wet methods include, for example, a method in which a gas such as SF 4 decomposed from SF 6 gas by electric discharge is absorbed in an alkaline absorption liquid, and the absorbed fluorine ions are measured by spectrophotometry (IEC standard 480); Alternatively, there is a method of measuring by back titrating an aqueous solution containing decomposed gas as an acid component with a standard sulfuric acid aqueous solution (IEC standard 376).
また、乾式法には、SF6分解ガスに反応して変
色する素子を封入したガスチエツク型検出器など
がある。 In addition, the dry method includes a gas check type detector that includes an element that changes color in response to SF 6 decomposition gas.
このような分解ガスの測定は、湿式法では測定
試料としての絶縁ガスをガス絶縁電気機器から採
取し、採取した絶縁ガスはこれを吸収液に吸収さ
せることにより測定される。一方、乾式法による
ガスチエツク型検出器ではガス絶縁電気機器中の
絶縁ガスを直接測定する。 In the wet method, such decomposition gas is measured by collecting an insulating gas as a measurement sample from a gas-insulated electric device and absorbing the collected insulating gas into an absorption liquid. On the other hand, a gas check type detector using a dry method directly measures the insulating gas in gas-insulated electrical equipment.
上記のような従来の分解ガス測定装置では、測
定のために操作員がガス絶縁電気機器設置場所ま
で必ず出向く必要があり、内部放電で特徴的に生
成される分解ガスを早期に検出することは困難で
あるという問題点があつた。また、SF6ガス空間
中に配置して地絡検出をオンラインで行なうセン
サーも知られているが、ガス絶縁電気機器の内部
異常を早期に発見するためには、検出能力が不足
するという問題点があつた。
With conventional decomposed gas measurement devices such as those mentioned above, operators must go to the location where gas-insulated electrical equipment is installed to perform measurements, making it difficult to detect decomposed gases characteristically produced by internal discharges at an early stage. The problem was that it was difficult. Additionally, sensors that are placed in SF 6 gas spaces and perform online ground fault detection are known, but they have the problem of insufficient detection capability to detect internal abnormalities in gas-insulated electrical equipment at an early stage. It was hot.
この発明は、かかる問題点を解決するためにな
されたもので、絶縁ガスの採取を必要とせず、生
成された微量の分解ガスを検出することができる
ガスセンサーを得ることを目的とする。 The present invention was made to solve this problem, and an object of the present invention is to provide a gas sensor that can detect a small amount of generated decomposed gas without requiring sampling of insulating gas.
この発明に係るガスセンサーは、ハロゲン化銀
及び銀イオン導電性固体電解質の混合物からなる
測定極と、銀イオン導電性固体電解質からなる電
解質層と、ハロゲン化銀、銀及び銀イオン導電性
固体電解質の混合物からなる基準極とを積層一体
化したものである。
The gas sensor according to the present invention includes a measurement electrode made of a mixture of silver halide and a silver ion conductive solid electrolyte, an electrolyte layer made of a silver ion conductive solid electrolyte, and a silver halide, silver and silver ion conductive solid electrolyte. A reference electrode made of a mixture of
この発明においては、内部放電の発生によりハ
ロゲン含有分解ガスが生成されると、生成された
分解ガスの濃度に対応して測定極と基準極との端
子電圧が変化するので、分解ガスすなわち被検出
ガスをサンプリングすることなくガス絶縁機器内
に直接ガスセンサーを設置することができ、その
場で即座に測定を行なうことができる。
In this invention, when a halogen-containing decomposed gas is generated due to the occurrence of internal discharge, the terminal voltage between the measurement electrode and the reference electrode changes in accordance with the concentration of the decomposed gas generated, so that the decomposed gas, that is, the detected Gas sensors can be installed directly inside gas-insulated equipment without sampling the gas, and measurements can be taken immediately on the spot.
第１図はこの発明の一実施例を示す断面図であ
り、１はハロゲン化銀例えばAgFと銀イオン導
電性固体電解質例えばAg3SIとの混合物から構成
される測定極、２はこの測定極１に隣接して設け
られ、銀イオン導電性固体電解質例えばAg3SIか
らなる電解質層、３はこの電解質層に隣接して設
けられた基準極であり、ハロゲン化銀例えば
AgFと銀と銀イオン導電性固体電解質例えば
Ag3SIとの混合物から構成される。４は測定極１
及び基準極３に接続されたPtリード線、５はこ
れらのPtリード線４に接続された電圧計、６は
測定極１、電解質層２、及び基準極３から構成さ
れるセンサー部を被覆するための絶縁層例えばエ
ポキシ樹脂、７は所望によりこの絶縁層６に組み
込まれたヒーター、８は測定極１の露出表面であ
る。
FIG. 1 is a cross-sectional view showing one embodiment of the present invention, in which 1 is a measuring electrode made of a mixture of silver halide, such as AgF, and a silver ion conductive solid electrolyte, such as Ag 3 SI, and 2 is this measuring electrode. A reference electrode 3 is provided adjacent to the electrolyte layer, and is made of a silver ion conductive solid electrolyte such as Ag 3 SI.
AgF and silver and silver ion conductive solid electrolytes e.g.
Composed of a mixture with Ag 3 SI. 4 is measurement pole 1
and a Pt lead wire connected to the reference electrode 3, 5 a voltmeter connected to these Pt lead wires 4, and 6 covering a sensor section consisting of the measurement electrode 1, the electrolyte layer 2, and the reference electrode 3. 7 is a heater incorporated in this insulating layer 6 if desired, and 8 is an exposed surface of the measuring electrode 1.
上記のように構成されたガスセンサーにおいて
は、ガス絶縁電気機器内で内部放電により分解ガ
ス例えばF2ガスが遊離した場合、F2ガスは測定
極１の露出表面８に接触し、測定極１では次のよ
うな反応が起こる。 In the gas sensor configured as described above, when a decomposed gas such as F 2 gas is liberated due to internal discharge in the gas insulated electrical equipment, the F 2 gas comes into contact with the exposed surface 8 of the measurement electrode 1 and Then the following reaction occurs.
F2＋2Ag+＋2e-→2AgF （測定極）（Ag3Siから） 一方、基準極３では次のような反応が起こる。 F 2 +2Ag + +2e - →2AgF (Measurement electrode) (from Ag 3 Si) On the other hand, the following reaction occurs at the reference electrode 3.
F2＋2Ag+＋2e-←2AgF
（基準極）（Ag3SIへ）
測定極１及び電解質層２を介した基準極３から
形成される電池の起電力Ｅは、基準極３のF2ガ
スの活量が一定になるようにセツトされているの
で、次のように表わされる。 F 2 +2Ag + +2e - ←2AgF (Reference electrode) (to Ag 3 SI) The electromotive force E of the battery formed from the measurement electrode 1 and the reference electrode 3 via the electrolyte layer 2 is the same as that of the F 2 gas in the reference electrode 3. Since the activity is set to be constant, it can be expressed as follows.
Ｅ＝Ａ＋BlnP
F2（測定極）
（ただし、Ａ、Ｂは定数である）
測定極１及び基準極３の組成は、分解ガスが生
成されると起電力Ｅが変化するように、分解ガス
と濃度的に平衡関係を生ずるような成分にしてお
く。また、測定極１及び基準極３の中に混入させ
た銀イオン導電性固体電解質は、電極活性質と固
体電解質の電気的接触を良くするためのものであ
る。ヒーター７はガスセンサーの応答速度を速く
したいときにセツトされ、ガスセンサーの温度を
約150℃以下の所定の温度に保つのに用いられる。 E=A+BlnP F 2 (Measurement electrode) (However, A and B are constants) The composition of the measurement electrode 1 and the reference electrode 3 is set so that the electromotive force E changes when the decomposition gas is generated. The ingredients should be such that an equilibrium relationship occurs in terms of concentration. Further, the silver ion conductive solid electrolyte mixed into the measurement electrode 1 and the reference electrode 3 is used to improve electrical contact between the electrode active material and the solid electrolyte. The heater 7 is set when it is desired to increase the response speed of the gas sensor, and is used to maintain the temperature of the gas sensor at a predetermined temperature of about 150° C. or less.
第２図は上記のようなガスセンサーの出力電圧
とF2ガス濃度との関係を示す線図である。この
図から、出力電圧はF2ガス濃度の対数に直線的
に対応して変化し、且つ高い検出能力を有するこ
とがわかる。また、この発明によるガスセンサー
は電圧検出型のセンサーであるので、金属イオン
の固体電解質中の移動が少なくてすみ、劣化の少
ない長寿命のセンサーである。 FIG. 2 is a diagram showing the relationship between the output voltage of the gas sensor as described above and the F 2 gas concentration. From this figure, it can be seen that the output voltage changes linearly in response to the logarithm of the F 2 gas concentration and has high detection ability. Furthermore, since the gas sensor according to the present invention is a voltage detection type sensor, there is less movement of metal ions in the solid electrolyte, and the sensor has a long life with less deterioration.
なお、上記実施例では銀イオン導電性固体電解
質としてAg3SIを用いて説明したが、RbAg4I5、
Ag6I4WO4等の銀イオン導電性固体電解質を用い
ても同様の効果を奏する。また、測定極１のハロ
ゲン化銀としてAgFを用いて説明したが、AgCl、
AgBr等を用いても同様の効果を奏する。また、
上記実施例では被検出ガスとしてF2ガスを用い
た場合を示したが、他のハロゲンガス例えばCl2
ガス、Br2ガスであつてもよく、又はハロゲン含
有ガス例えばSF4ガスであつても同様の効果を奏
する。 In the above example, Ag 3 SI was used as the silver ion conductive solid electrolyte, but RbAg 4 I 5 , RbAg 4 I 5 ,
A similar effect can be obtained by using a silver ion conductive solid electrolyte such as Ag 6 I 4 WO 4 . In addition, although AgF was used as the silver halide in measurement electrode 1, AgCl,
A similar effect can be obtained by using AgBr or the like. Also,
In the above embodiment, F 2 gas was used as the gas to be detected, but other halogen gases such as Cl 2
A similar effect can be obtained by using a gas, Br 2 gas, or a halogen-containing gas such as SF 4 gas.
この発明は以上説明したとおり、ハロゲン化銀
と銀イオン導電性固体電解質との混合物からな
り、被検出ガスが接触させられる露出表面を有す
る測定極と、この測定極の裏面に設けられて銀イ
オン導電性固体電解質からなる電解質層と、この
電解質層に隣接して設けられ、ハロゲン化銀と銀
と銀イオン導電性固体電解質との混合物からなる
基準極と、を備えたことにより、被検出ガスをガ
ス絶縁電気機器からサンプリングすることなく、
その場で被検出ガスの濃度を測定することができ
る。また、電圧検出型のセンサーであるので、劣
化が少なく長寿命であり、検出能力の高いガスセ
ンサーを得ることができる効果がある。
As explained above, this invention comprises a measurement electrode which is made of a mixture of silver halide and a silver ion conductive solid electrolyte and has an exposed surface with which a gas to be detected is brought into contact, and a measurement electrode which is provided on the back surface of the measurement electrode and has a silver ion conductive solid electrolyte. The gas to be detected is without sampling from gas-insulated electrical equipment.
The concentration of the gas to be detected can be measured on the spot. Furthermore, since it is a voltage detection type sensor, it has the advantage of being less susceptible to deterioration and has a long lifespan, making it possible to obtain a gas sensor with high detection ability.
第１図はこの発明の一実施例を示す断面図、第
２図は第１図のガスセンサーの出力電圧とF2ガ
ス濃度との関係を示す線図である。
図において、１は測定極、２は電解質層、３は
基準極、４はPtリード線、５は電圧計、６は絶
縁層、７はヒーター、８は測定極１の露出表面で
ある。
FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a diagram showing the relationship between the output voltage of the gas sensor shown in FIG. 1 and the F 2 gas concentration. In the figure, 1 is a measuring electrode, 2 is an electrolyte layer, 3 is a reference electrode, 4 is a Pt lead wire, 5 is a voltmeter, 6 is an insulating layer, 7 is a heater, and 8 is the exposed surface of the measuring electrode 1.
Claims (1)
の混合物からなり、被検出ガスが接触させられる
露出表面を有する測定極と、 この測定極の裏面に設けられて銀イオン導電性
固体電解質からなる電解質層と、 この電解質層に隣接して設けられ、ハロゲン化
銀と銀と銀イオン導電性固体電解質との混合物か
らなる基準極と、 を備えたことを特徴とするガスセンサー。 ２ 銀イオン導電性固体電解質は、Ag3SI、
RbAg4I5及びAg6I4WO4からなる群から選ばれた
ことを特徴とする特許請求の範囲第１項記載のガ
スセンサー。 ３ ハロゲン化銀は、フツ化銀、塩化銀及び臭化
銀からなる群から選ばれたことを特徴とする特許
請求の範囲第１項記載のガスセンサー。 ４ 被検出ガスは、ハロゲンガス又はハロゲン含
有ガスであることを特徴とする特許請求の範囲第
１項記載のガスセンサー。 ５ ハロゲンガスは、フツ素ガス、塩素ガス及び
臭素ガスからなる群から選ばれたことを特徴とす
る特許請求の範囲第４項記載のガスセンサー。 ６ 測定極、電解質層及び基準極は積層一体化さ
れかつ前記測定極の露出表面以外の部分が絶縁層
で覆われ、この絶縁層にヒーターが組み込まれた
ことを特徴とする特許請求の範囲第１項記載のガ
スセンサー。[Scope of Claims] 1. A measurement electrode made of a mixture of silver halide and a silver ion conductive solid electrolyte and having an exposed surface with which the gas to be detected comes into contact; A gas sensor comprising: an electrolyte layer made of a conductive solid electrolyte; and a reference electrode provided adjacent to the electrolyte layer and made of a mixture of silver halide, silver, and a silver ion conductive solid electrolyte. . 2 The silver ion conductive solid electrolyte is Ag 3 SI,
The gas sensor according to claim 1, characterized in that the gas sensor is selected from the group consisting of RbAg 4 I 5 and Ag 6 I 4 WO 4 . 3. The gas sensor according to claim 1, wherein the silver halide is selected from the group consisting of silver fluoride, silver chloride, and silver bromide. 4. The gas sensor according to claim 1, wherein the gas to be detected is a halogen gas or a halogen-containing gas. 5. The gas sensor according to claim 4, wherein the halogen gas is selected from the group consisting of fluorine gas, chlorine gas, and bromine gas. 6. The measurement electrode, the electrolyte layer, and the reference electrode are integrally laminated, and the portion of the measurement electrode other than the exposed surface is covered with an insulating layer, and a heater is incorporated in this insulating layer. Gas sensor according to item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61050597A JPS62207952A (en) | 1986-03-10 | 1986-03-10 | Gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61050597A JPS62207952A (en) | 1986-03-10 | 1986-03-10 | Gas sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62207952A JPS62207952A (en) | 1987-09-12 |
| JPH0560547B2 true JPH0560547B2 (en) | 1993-09-02 |
Family
ID=12863378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61050597A Granted JPS62207952A (en) | 1986-03-10 | 1986-03-10 | Gas sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62207952A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02114168A (en) * | 1988-10-24 | 1990-04-26 | Mitsubishi Electric Corp | Gas sensor |
| JP3340028B2 (en) * | 1996-07-12 | 2002-10-28 | 三菱電機株式会社 | Gas sensor |
| GB2348006B (en) | 1999-03-19 | 2003-07-23 | Alphasense Ltd | Gas sensor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52141291A (en) * | 1976-05-19 | 1977-11-25 | Matsushita Electric Ind Co Ltd | Halogen densitometer |
| JPS60256043A (en) * | 1984-06-01 | 1985-12-17 | Advance Res & Dev Co Ltd | Gas sensor |
-
1986
- 1986-03-10 JP JP61050597A patent/JPS62207952A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52141291A (en) * | 1976-05-19 | 1977-11-25 | Matsushita Electric Ind Co Ltd | Halogen densitometer |
| JPS60256043A (en) * | 1984-06-01 | 1985-12-17 | Advance Res & Dev Co Ltd | Gas sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62207952A (en) | 1987-09-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4568445A (en) | Electrode system for an electro-chemical sensor for measuring vapor concentrations | |
| US3905889A (en) | Miniature multifunctional electrochemical sensor for simultaneous carbon dioxide-pH measurements | |
| US6423209B1 (en) | Acid gas measuring sensors and method of using same | |
| JPS63140954A (en) | Sensor for monitoring concentration of hydrogen in gas | |
| US4622105A (en) | Method for measuring gaseous sulfur dioxide | |
| US3923627A (en) | Miniature probe containing multifunctional electrochemical sensing electrodes | |
| JPH0560547B2 (en) | ||
| JPH0130102B2 (en) | ||
| US4710848A (en) | Solid state cell | |
| EP0366098B1 (en) | Gas detector | |
| EP1039292B1 (en) | Method of detecting the concentration of carbon dioxide in a gas mixture | |
| Miyazaki et al. | A new potential‐type humidity sensor using EMD‐based manganese oxides as a solid electrolyte | |
| JPS63138253A (en) | Solid electrode for measuring sodium ion concentration in solution and sensor containing said electrode | |
| JPH0713615B2 (en) | Method and apparatus for detecting damaged pH sensor | |
| EP0096117B1 (en) | Analyzer for chemical oxidizing or reducing agents | |
| US5552025A (en) | Sensors | |
| RU2053506C1 (en) | Solid electrolyte sensor for gas analysis | |
| JP2678045B2 (en) | Carbon dioxide sensor | |
| JPS61200456A (en) | Sf6 decomposed gas sensor | |
| RU2018118C1 (en) | Electrochemical gas sensor | |
| JP2008064492A (en) | Test gas accumulation type gas sensor | |
| CA1175905A (en) | Analyzer for chemical oxidizing or reducing agents | |
| KR100414195B1 (en) | SOLID ELECTROLYTE-TYPE SOx SENSOR USING OXIDE REFERENCE ELECTRODE | |
| JP2002350394A (en) | Electrochemical detecting device | |
| JP2761086B2 (en) | Electrochemical gas sensor device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |