JPH0455749A - Continuous measuring apparatus for concentration of co gas - Google Patents
Continuous measuring apparatus for concentration of co gasInfo
- Publication number
- JPH0455749A JPH0455749A JP2166506A JP16650690A JPH0455749A JP H0455749 A JPH0455749 A JP H0455749A JP 2166506 A JP2166506 A JP 2166506A JP 16650690 A JP16650690 A JP 16650690A JP H0455749 A JPH0455749 A JP H0455749A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- zirconia
- electromotive force
- pipe
- 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.)
- Pending
Links
- 239000007789 gas Substances 0.000 claims abstract description 73
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 66
- 238000005259 measurement Methods 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000001301 oxygen Substances 0.000 claims abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 7
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 7
- 239000000523 sample Substances 0.000 claims abstract description 4
- 230000003197 catalytic effect Effects 0.000 claims description 17
- 239000010416 ion conductor Substances 0.000 claims description 6
- 239000007784 solid electrolyte Substances 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 4
- 239000010453 quartz Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 abstract description 10
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000007423 decrease Effects 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- -1 Q-2 ions Chemical class 0.000 description 1
- DDHXQDUQHLEATR-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[Zr+4].[Mo+4] Chemical compound [O-2].[O-2].[O-2].[O-2].[Zr+4].[Mo+4] DDHXQDUQHLEATR-UHFFFAOYSA-N 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
く産業上の利用分野〉
本発明は、ＣＯガス濃度の連続測定装置に関し、更に詳
しくは、検出器の構造を改善して測定ガスに含まれるＣ
Ｏガスの濃度を連続的かつ正確に測定できるようにした
ＣＯガス１１度の連続測定装置に閏する。Detailed Description of the Invention Industrial Application Field The present invention relates to a device for continuously measuring CO gas concentration, and more specifically, the present invention relates to a device for continuously measuring CO gas concentration, and more specifically, the present invention relates to a device for continuously measuring CO gas concentration.
We will use a continuous measuring device for CO gas at 11 degrees Celsius, which allows us to measure the concentration of O gas continuously and accurately.
〈従来の技術〉
一般に、燃焼プロセスにおいては省エネルギーや公害防
止の観点から煙道を流れる燃焼排ガスに含まれる酸素と
可燃ガスの１１度を常時監視し、燃焼炉が最適状態で運
転されるように燃焼制御される。このような煙道を流れ
る燃焼排ガスに含まれるＣＯガスのｉｌｌを連続的に測
定するには従来法のような装置が用いられていた。即ち
、！！素イオン伝導体からなるジルコニア固体電解質で
構成されたジルコニア管に内側電極と外側ｊ！極を設け
、測定ガスの入る該内側電極を非触媒性の電極で構成す
ると共に比較ガスが入る外側ＴＩｉ極を触蝶能の強い電
極で構成し、ジルコニアセンサの起電力から前記測定ガ
ス中のＣＯガスＳ度を求めるようになっていた。また、
ジルコニアセンサーの先端部には、ダストがセル内に入
らないようにするためステンレス製またはアルミナ製の
金網が使用されていた。<Conventional technology> Generally, in the combustion process, from the viewpoint of energy saving and pollution prevention, the oxygen and combustible gases contained in the flue gas flowing through the flue are constantly monitored at 11 degrees Celsius to ensure that the combustion furnace is operated in optimal conditions. Combustion is controlled. Conventional devices have been used to continuously measure the amount of CO gas contained in the combustion exhaust gas flowing through the flue. That is,! ! A zirconia tube made of a zirconia solid electrolyte made of an elementary ion conductor has an inner electrode and an outer j! The inner electrode, into which the measurement gas enters, is made of a non-catalytic electrode, and the outer TIi electrode, into which the comparison gas enters, is made up of an electrode with a strong tactile ability. The CO gas S degree was to be determined. Also,
A stainless steel or alumina wire mesh was used at the tip of the zirconia sensor to prevent dust from entering the cell.
然しながら、このような従来例においては、内測定ガス
が触媒能の強いステンレスの酸化膜やアルミナと接触す
るため、これが触媒となって測定ガス中のＣＯガスが下
式（１）のように酸化され、結果的にジルコニアセンサ
の起電力が低下して大きな測定誤差を生ずるという欠点
があった。However, in such conventional examples, the internal measurement gas comes into contact with the stainless steel oxide film and alumina, which have strong catalytic ability, and this acts as a catalyst, causing the CO gas in the measurement gas to oxidize as shown in equation (1) below. As a result, the electromotive force of the zirconia sensor decreases, resulting in a large measurement error.
ｃｏ＋ （１／２）Ｏｘ→ＣＯ２・・・・・・（１）ま
た、フィルタを用いない場合は煙道中のダストがセル内
に入り、このダストが触媒となっていた。co+ (1/2)Ox→CO2 (1) Moreover, when a filter is not used, dust in the flue enters the cell, and this dust acts as a catalyst.
〈発明が解決しようとする問題点〉
本発明は、かかる従来例の欠点に鑑みてなされたもので
あり、その解決しようとする技術的課題は、検出器の指
示が実測時と校正時で一致すると共に長期間安定して被
測定成分を測定できるＣ０ガス濃度の連続測定ｉ！キを
提供することにある。<Problems to be Solved by the Invention> The present invention has been made in view of the drawbacks of the conventional example, and the technical problem to be solved is to ensure that the indications of the detector are the same at the time of actual measurement and at the time of calibration. Continuous measurement of CO gas concentration that allows stable measurement of the measured component over a long period of time i! The goal is to provide the key.
〈問題点を解決するための手段〉
上述のような問題点（技術的課題）を解決する本発明は
、ジルコニアセルと測定ガスが接触する部分にＣＯガス
の酸化触媒となる材料を使用しないことによって前記問
題点を解決したものである。<Means for Solving the Problems> The present invention, which solves the above-mentioned problems (technical problems), does not use a material that serves as an oxidation catalyst for CO gas in the part where the zirconia cell and the measurement gas come into contact. This solves the above problem.
即も、本発明の特徴は、酸素イオン伝導体からなるジル
コニア固体電解質で構成されたジルコニアセンサの起電
力から前記測定ガス中の可燃ガス濃度を求めるＣＯガス
濃度の連続測定装置において、プローブの先端にシリコ
ーンカーバイドの焼結材料でなるフィルタを設けること
によって前記課題を解決したものである。また、同様に
して、本発明は、ＣＯガスｌｆｉの連続測定装置におい
て、非触媒性の石英管または他のガラス管を、校正ガス
導入管として用いることによって前記ｖＲ１１を解決し
たものである。Immediately, the feature of the present invention is that in a continuous measuring device for CO gas concentration, which determines the combustible gas concentration in the measurement gas from the electromotive force of a zirconia sensor made of a zirconia solid electrolyte made of an oxygen ion conductor, This problem has been solved by providing a filter made of a sintered silicone carbide material. Similarly, the present invention solves vR11 by using a non-catalytic quartz tube or other glass tube as a calibration gas introduction tube in a continuous measurement device for CO gas lfi.
〈実施例〉
以下、図面を用いて本発明実施例について詳しく説明す
る。第１図は本発明実施例の構成断面図であり、図中、
１は例えば１ｌｌＡイオン伝導体からなるジルコニア固
体電解質で構成されている試験管形のジルコニア管、２
は後述の内Ｉｌｌ極１６ａの電極リードと接触するリン
グ状の正側コンタクト、３は後述の外側電極１６ｂの電
極リードと接触するリング状の負側コンタクト、４はカ
バープレート、５はＯリング、６はプローブパイプ、７
゜７−は非触媒性の石英管または他のガラス管でなる校
正ガス導入管、８は比較ガス導入管、９は熱電対、１０
はジルコニア管１を加熱するためのヒータ、１１は仕切
板、１２は燃焼排ガスなどでなる測定ガスＭＧが流れる
煙道の！！！（図示せず）等に装置を固定するためのフ
ランジ、１３は端子箱、１４はバッキング、１５は校正
ガス導入口、１６ａはジルコニア管１５の底部に￥７Ａ
Ｉｆされた非触媒性（触媒能が極めて少ない）物質であ
る例えば２γＭＯ２０［１（モリブデンジルコニウムオ
キサイド）でなる内側電極、１６ｂはジルコニア管１が
基準ガスＲＧと接触する面（外側面）に装着され白金粉
末などを焼結した多孔質白金触媒でなる外側電極、１７
はプローブパイプ６の先端に装着されたシリコーンカー
バイドの焼結材料でなるフィルターである。<Examples> Examples of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a cross-sectional view of the configuration of an embodiment of the present invention, and in the figure,
1 is a test tube-shaped zirconia tube made of a zirconia solid electrolyte made of, for example, a 11A ionic conductor; 2;
3 is a ring-shaped negative side contact that contacts the electrode lead of the inner electrode 16b, which will be described later; 4 is a cover plate; 5 is an O-ring; 6 is a probe pipe, 7
゜7- is a calibration gas introduction tube made of a non-catalytic quartz tube or other glass tube, 8 is a comparison gas introduction tube, 9 is a thermocouple, 10
is a heater for heating the zirconia tube 1, 11 is a partition plate, and 12 is a flue through which the measurement gas MG, which is composed of combustion exhaust gas, flows! ! ! (not shown) etc., 13 is a terminal box, 14 is a backing, 15 is a calibration gas inlet, 16a is attached to the bottom of the zirconia tube 15 for ¥7A
An inner electrode 16b made of a non-catalytic (very low catalytic ability) material such as 2γMO20[1 (molybdenum zirconium oxide)] is attached to the surface (outer surface) of the zirconia tube 1 in contact with the reference gas RG. Outer electrode made of porous platinum catalyst made by sintering platinum powder, etc., 17
is a filter made of a sintered silicone carbide material attached to the tip of the probe pipe 6.
このような構成からなる本発明の実施例において、測定
ガスＭＧはフィルタ１７を透過して含有する触媒性物質
が除去されてのちジルコニア管１の内側に導かれ、内側
電極１６ａに供給される。In the embodiment of the present invention having such a configuration, the measurement gas MG passes through the filter 17 to remove the catalytic substance contained therein, and is then guided inside the zirconia tube 1 and supplied to the inner electrode 16a.
また、比較ガス導入管８から導入された比較ガスＲＧは
ジルコニア管１の外側に供給されている。Further, the comparison gas RG introduced from the comparison gas introduction pipe 8 is supplied to the outside of the zirconia tube 1.
この状態で、ヒータ９によりジルコニア管１を酸素イオ
ン訳導体となる温度まで（通常、５００’Ｃ）加熱する
と、測定ガスＭＧに含まれているＣＯは内側電極１６ａ
に接触し前記（１）式のような触媒反応を起こす。 こ
の結果、ジルコニアセンサーの外側電極１６ｂと負側コ
ンタクト３との間には、反応によって消費されるＣＯガ
スの量に対応する起電力が発生する。In this state, when the zirconia tube 1 is heated by the heater 9 to a temperature at which it becomes an oxygen ion conductor (usually 500'C), the CO contained in the measurement gas MG is removed from the inner electrode 16a.
, causing a catalytic reaction as shown in formula (1) above. As a result, an electromotive force corresponding to the amount of CO gas consumed by the reaction is generated between the outer electrode 16b of the zirconia sensor and the negative contact 3.
ところで、測定ガスＭＧのＯｚ１度をχ％、ＣＯガス濃
度を１％、比較ガスＲＧの０２１度を２０．６％とした
場合、起電力Ｅ＾は次の式に従い下式（２）のように表
すことができる。By the way, if the measurement gas MG's Oz 1 degree is χ%, the CO gas concentration is 1%, and the comparison gas RG's 021 degree is 20.6%, the electromotive force E^ is calculated as shown in the following formula (2) according to the following formula. It can be expressed as
Ｅ＾＝に＾・（ＲＴ＾／４Ｆ）・１Ｔ１（ｙ／χ）＋Ｃ
＾ ・・・・・・・・・・・・・・・・・・・・・・・
・・・・ （２）但し、Ｆ：ファラデ一定数、Ｒ：ガス
定数、Ｔ＾：動作温度、Ｋ＾、ＣＡ：定数。E^=ni^・(RT^/4F)・1T1(y/χ)+C
^ ・・・・・・・・・・・・・・・・・・・・・・・・
... (2) However, F: Faraday constant, R: gas constant, T^: operating temperature, K^, CA: constant.
また、内側電極１６８は触媒能が極めて少ない電極材料
で構成されており、しかも、ジルコニア管１内に触媒性
物質は存在しない。このため、測定ガスＭＧ中の酸素ガ
スとＣＯガスが一緒に内側電極１６ａに到達しても、該
ＣＯガスだけが、上記ネルンストの式に従い、測定ガス
ＭＧ中のＣＯガス濃度に対応した起電力を発生させる。Furthermore, the inner electrode 168 is made of an electrode material with extremely low catalytic ability, and moreover, no catalytic substance is present within the zirconia tube 1. Therefore, even if oxygen gas and CO gas in the measurement gas MG reach the inner electrode 16a together, only the CO gas generates an electromotive force corresponding to the CO gas concentration in the measurement gas MG according to the Nernst equation. to occur.
即ち、ＣＯガスはジルコニア管１内部のＱ−２イオンと
、ＣＯ＋ Ｏ’ →ＣＯ２＋ ２ ｅ−−
（３）の如く反応し、起電力を発生する。また、この起
電力に対応した検出信号は図示しない信号処理器で信＠
処理することにより、測定ガス中の酸素とＣＯガスを連
続かつ正確に測定できるようになる。That is, the CO gas and the Q-2 ions inside the zirconia tube 1 and CO+ O' → CO2+ 2 e--
It reacts as shown in (3) and generates an electromotive force. In addition, a detection signal corresponding to this electromotive force is sent by a signal processor (not shown).
By processing, oxygen and CO gas in the measurement gas can be measured continuously and accurately.
一方、第２図は前記従来例の場合と本発明実施例の場合
についてジルコニアセンサから生ずるセル起電力を比較
した実験結彎を示すセル起電力の特性曲線図である。こ
の図において、横軸は第１図の内側電極１６ａに供給さ
れるＣＯガス激度と酸素ガス濃度が一定の校正ガスの流
１（ｍｌ／ｍｎ、）を示し、縦軸はジルコニアセンサの
電極間に発生する起電力（ｍＶ）を示している。また、
第２図の特性−１ｉ１Ｂから明らかなように、前記従来
例の場合は校正ガス流量の減少に伴なってセル起電力が
斬減しているが、本発明実施例＠例の４合は特性曲線Ａ
で示すように校正ガス流量の変化に係わらずセル起電力
が一定となっている。これは次のような理由によるもの
である。On the other hand, FIG. 2 is a characteristic curve diagram of the cell electromotive force showing an experimental result comparing the cell electromotive force generated from the zirconia sensor in the case of the conventional example and the case of the embodiment of the present invention. In this figure, the horizontal axis shows the flow 1 (ml/mn) of the calibration gas with constant CO gas intensity and oxygen gas concentration supplied to the inner electrode 16a of FIG. 1, and the vertical axis shows the electrode of the zirconia sensor. It shows the electromotive force (mV) generated during that time. Also,
As is clear from the characteristic-1i1B in FIG. 2, in the case of the conventional example, the cell electromotive force decreases sharply as the calibration gas flow rate decreases, but in the case of the fourth case of the present invention example, the characteristic Curve A
As shown in , the cell electromotive force remains constant regardless of changes in the calibration gas flow rate. This is due to the following reasons.
即ち、前記従来例のように第１図のジルコニアセンサに
触媒性物質が存在する場合にはの場合には、該触媒によ
って測定ガス中のＣＯガスが酸化されてＣＯ２となり、
その結果、ジルコニアセンサの起電力が低下するように
なる。これに対し、本発明実施例のように第１図のジル
コニア１１１内に触媒性物質が存在しない場合には、ジ
ルコニア管１内で前記従来例のような触媒作用がないた
め、測定ガス中のＣＯガスが酸化されることはなくジル
コニアセンサの起電力が低下するようなこともない。That is, in the case where a catalytic substance is present in the zirconia sensor of FIG. 1 as in the conventional example, the CO gas in the measurement gas is oxidized by the catalyst to become CO2,
As a result, the electromotive force of the zirconia sensor decreases. On the other hand, when there is no catalytic substance in the zirconia 111 shown in FIG. 1 as in the embodiment of the present invention, there is no catalytic action in the zirconia tube 1 as in the conventional example, so The CO gas is not oxidized and the electromotive force of the zirconia sensor does not decrease.
尚、測定ガスを実際に測定する場合には、測定ガスが第
１図のジルコニア管１内に拡散や対流で供給され該供給
ガス流量が少ないため、第３図の特性曲線図で示した現
象がより顕茗に現われるようになる。In addition, when actually measuring the measurement gas, the measurement gas is supplied into the zirconia tube 1 shown in Fig. 1 by diffusion or convection, and the flow rate of the supplied gas is small, so the phenomenon shown in the characteristic curve diagram of Fig. 3 occurs. begins to appear more clearly.
〈発明の効果〉
以上詳しく説明したような本発明によれば、次の■〜■
のような効果が得られる。即ち、■７０−ブパイプの先
端にシリコーンカーバイドの焼結材料でなるフィルタを
装着したため、測定ガス中のダストがジルコニア管内に
入らなくなり、その結果、該ダストの中に触媒性物質が
含まれている場合であってもジルコニア管の高温部分に
触媒性物質が到達せず触媒による感度低下も回避できる
。<Effects of the Invention> According to the present invention as explained in detail above, the following ■～■
You can get an effect like this. In other words, (1) A filter made of sintered silicone carbide material was attached to the tip of the 70-tube pipe, so dust in the measurement gas was prevented from entering the zirconia pipe, and as a result, the dust contained catalytic substances. Even in such a case, the catalytic substance does not reach the high-temperature portion of the zirconia tube, and a decrease in sensitivity due to the catalyst can be avoided.
■シリコーンカーバイドの焼結材料でなるフィルタは常
温ないし５００” Ｃの間で殆ど触媒性を持たないため
、該フィルタ自体が触媒になることはない。(2) A filter made of a sintered silicone carbide material has almost no catalytic properties between room temperature and 500''C, so the filter itself does not act as a catalyst.
■非触媒性の石英管または他のガラス管を校正ガス導入
管として用いているため、表面に形成される酸化膜が触
媒となることもなく、このような触媒に起因して前記従
来例で生じていた感度低下や校正時と実測時の測定値の
ずれなどを回避できる。■Since a non-catalytic quartz tube or other glass tube is used as the calibration gas introduction tube, the oxide film formed on the surface does not act as a catalyst. It is possible to avoid the decrease in sensitivity and the discrepancy between the measured values during calibration and actual measurement.
第１図は本発明実施例の構成断面図、第２図はジルコニ
アのセル起電力特性曲線図である。FIG. 1 is a cross-sectional view of the structure of an embodiment of the present invention, and FIG. 2 is a zirconia cell electromotive force characteristic curve diagram.
Claims (1)
構成されたジルコニアセンサの起電力から測定ガス中の
ＣＯガス濃度を求めるＣＯガス濃度の連続測定装置にお
いて、プローブの先端にシリコーンカーバイドの焼結材
料でなるフィルタを設けたことを特徴とするＣＯガス濃
度の連続測定装置。 ２）酸素イオン伝導体からなるジルコニア固体電解質で
構成されたジルコニアセンサの起電力から測定ガス中の
ＣＯガス濃度を求めるＣＯガス濃度の連続測定装置にお
いて、非触媒性の石英管または他のガラス管を、校正ガ
ス導入管として用いたことを特徴とするＣＯガス濃度の
連続測定装置。[Claims] 1) In a continuous CO gas concentration measuring device that determines the CO gas concentration in a measurement gas from the electromotive force of a zirconia sensor made of a zirconia solid electrolyte made of an oxygen ion conductor, silicone is attached to the tip of the probe. A continuous measuring device for CO gas concentration, characterized in that it is equipped with a filter made of sintered carbide material. 2) In a continuous CO gas concentration measuring device that determines the CO gas concentration in the measurement gas from the electromotive force of a zirconia sensor made of a zirconia solid electrolyte made of an oxygen ion conductor, a non-catalytic quartz tube or other glass tube is used. A continuous measuring device for CO gas concentration, characterized in that it is used as a calibration gas introduction pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2166506A JPH0455749A (en) | 1990-06-25 | 1990-06-25 | Continuous measuring apparatus for concentration of co gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2166506A JPH0455749A (en) | 1990-06-25 | 1990-06-25 | Continuous measuring apparatus for concentration of co gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0455749A true JPH0455749A (en) | 1992-02-24 |
Family
ID=15832616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2166506A Pending JPH0455749A (en) | 1990-06-25 | 1990-06-25 | Continuous measuring apparatus for concentration of co gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0455749A (en) |
-
1990
- 1990-06-25 JP JP2166506A patent/JPH0455749A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5397442A (en) | Sensor and method for accurately measuring concentrations of oxide compounds in gas mixtures | |
| Szabo et al. | Correlation of sensing behavior of mixed potential sensors with chemical and electrochemical properties of electrodes | |
| CN205620345U (en) | Be used for CO to appear measuring oxygen sensor suddenly | |
| JPS6055777B2 (en) | Combustible sensor | |
| JPH0562947B2 (en) | ||
| JPH0664004B2 (en) | Apparatus and method for measuring oxygen content of gas | |
| EP0432962B1 (en) | Flammable gas detection | |
| JPH11501395A (en) | Device and method for measuring gaseous components in a gas mixture | |
| US5635627A (en) | Carbon monoxide sensor having mercury doped electrodes | |
| EP0236441A1 (en) | In-stream gas sensor | |
| JPH0414302B2 (en) | ||
| US4663017A (en) | Combustibles sensor | |
| JPH0455749A (en) | Continuous measuring apparatus for concentration of co gas | |
| CN101027549B (en) | Sulfur resistant sensors | |
| JP2775487B2 (en) | Oxygen sensor for heat treatment furnace | |
| JP4908683B2 (en) | Nitric oxide analyzer and sensor element for measuring nitric oxide | |
| JPH0128338B2 (en) | ||
| KR20220028947A (en) | Mixed potentiometric type nitrogen oxide sensor using bias voltage | |
| JP2836184B2 (en) | Combustible gas measuring device | |
| JP6775814B2 (en) | Gas concentration measuring device | |
| JPH0552802A (en) | Continuously measuring apparatus for co gas | |
| JP2881947B2 (en) | Zirconia sensor | |
| US10161899B2 (en) | Oxygen sensor with electrochemical protection mode | |
| RU2780308C1 (en) | Potentiometric solid-electrolyte cell | |
| JPH075150A (en) | Solid electrolytic sensor device |