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JPH0230765Y2 - - Google Patents

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Publication number
JPH0230765Y2
JPH0230765Y2 JP1982012900U JP1290082U JPH0230765Y2 JP H0230765 Y2 JPH0230765 Y2 JP H0230765Y2 JP 1982012900 U JP1982012900 U JP 1982012900U JP 1290082 U JP1290082 U JP 1290082U JP H0230765 Y2 JPH0230765 Y2 JP H0230765Y2
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JP
Japan
Prior art keywords
gas
solid electrolyte
electrode
oxygen
measurement
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
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JP1982012900U
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Japanese (ja)
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JPS58116652U (en
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  • Measuring Oxygen Concentration In Cells (AREA)

Description

【考案の詳細な説明】 (産業上の利用分野) 本考案は、焼却炉の排ガスあるいは煙道排ガス
の水分含有量を測定し得るようにした酸素導伝性
固体電解質を用いた水分測定装置に関する。
[Detailed description of the invention] (Field of industrial application) The present invention relates to a moisture measuring device using an oxygen-conducting solid electrolyte that can measure the moisture content of incinerator exhaust gas or flue gas. .

(従来の技術) 一般に、燃焼管理のために排ガス中の酸素含有
量を測定することはよく行われているところであ
るが、排ガス中の水分含有量を測定することも省
エネルギの観点から重要である。
(Prior art) Generally, it is common practice to measure the oxygen content in exhaust gas for combustion control, but it is also important to measure the moisture content in exhaust gas from the perspective of energy conservation. be.

ところで、酸素導伝性固体電解質を用いた水分
測定装置としては、第1空気室と、第2空気室
と、この第1空気室の中に設けられ第2空気室を
内部に備え、かつその内外両面に電極を備えた固
体電解質の管と、第1空気室と第2空気室のいず
れか一方に乾燥標準空気を、他の一方に被測定ガ
スを流入させる手段とを備えたものが、実開昭52
−126894号公報に開示されている。この従来装置
は、使用している固体電解質の性質上、高温での
使用に適し、高温度の排ガスを測定対象にするの
に適している。
By the way, a moisture measuring device using an oxygen-conducting solid electrolyte is equipped with a first air chamber, a second air chamber, and a second air chamber provided inside the first air chamber. A solid electrolyte tube equipped with electrodes on both the inside and outside surfaces, and means for flowing dry standard air into either the first air chamber or the second air chamber and the gas to be measured into the other, Jitsukai Showa 52
-Disclosed in Publication No. 126894. This conventional device is suitable for use at high temperatures due to the properties of the solid electrolyte used, and is suitable for measuring high-temperature exhaust gas.

(考案が解決しようとする課題) しかしながら、上記従来装置は乾燥標準空気を
比較ガスとして用いるものであるため、以下に述
べる不具合があつた。
(Problems to be Solved by the Invention) However, since the conventional device described above uses dry standard air as a comparison gas, it has the following problems.

従来装置は、酸素導伝性固体電解質の両面に電
極を設け、この電極に接触する被測定ガスと比較
ガスとしての乾燥標準空気のそれぞれの酸素含有
量の差を電極間の起電力として取り出し、これを
水分含有量に換算するものである。従つて、被測
定ガスの酸素含有量と比較ガスの酸素含有量との
差は、全て水分含有量の違いによるものとの仮定
に立つている。この仮定は、被測定ガスが乾燥炉
からの排出ガスのように、ガスが乾燥炉へ導入さ
れてから排出されるまでの間に、その含有してい
た酸素が消費されないと見做せる場合には、妥当
性を有する。しかしながら、焼却炉の排ガスのよ
うに、焼却炉へ導入されてから排出されるまでの
間に、その含有していた酸素が消費されるものに
おいては、比較ガスとしての乾燥標準空気と被測
定ガスとしての排ガスの酸素含有量の差は、両ガ
ス水分含有量の差のみによるものではない。例え
ば、焼却炉における酸素消費量は、焼却物の性質
や量に左右される。従つて、電極間の起電力を一
義的に両ガスの水分含有量の差に対応させること
はできない。
In the conventional device, electrodes are provided on both sides of an oxygen-conducting solid electrolyte, and the difference in oxygen content between the gas to be measured and dry standard air as a comparison gas that comes into contact with the electrodes is extracted as an electromotive force between the electrodes. This is converted into water content. Therefore, it is assumed that the difference between the oxygen content of the measured gas and the oxygen content of the comparison gas is entirely due to the difference in water content. This assumption applies when it is assumed that the oxygen contained in the gas to be measured is not consumed between the time the gas is introduced into the drying furnace and the time it is discharged, such as exhaust gas from a drying furnace. has validity. However, in the case of exhaust gas from an incinerator, where the oxygen it contains is consumed between the time it is introduced into the incinerator and the time it is discharged, dry standard air as a comparison gas and the gas to be measured are used. The difference in the oxygen content of the exhaust gases is not only due to the difference in the moisture content of the two gases. For example, the amount of oxygen consumed in an incinerator depends on the nature and amount of the incinerated material. Therefore, the electromotive force between the electrodes cannot be uniquely made to correspond to the difference in water content between the two gases.

本考案は、上述の点に鑑み、従来技術の問題点
を有効に解決し、電極間の起電力と比較ガス、被
測定ガス間の水分含有量差とを一義的に対応付け
ることができる酸素導伝性固体電解質を用いた水
分測定装置を提供することを目的とする。
In view of the above-mentioned points, the present invention effectively solves the problems of the conventional technology, and provides an oxygen conductor that can uniquely associate the electromotive force between the electrodes with the water content difference between the comparison gas and the measured gas. The purpose of the present invention is to provide a moisture measuring device using a conductive solid electrolyte.

(課題を解決するための手段) 上記目的を達成するために、本考案において
は、円筒形にして一端が閉鎖された酸素イオンの
導伝性を示す固体電解質エレメントと、この固体
電解質エレメントの外面に設けられ酸素ガスおよ
び水分が共存する測定ガスに接触する測定電極
と、固体電解質エレメントの内面に測定電極に対
向して設けられた比較電極と、固体電解質エレメ
ント,測定電極および比較電極を加熱するべく固
体電解質エレメントの外側に設けられたヒータ
と、固体電解質エレメントと測定電極と比較電極
とヒータとを覆う円筒形にして一端が閉鎖された
フイルタとからなる水分測定装置に、一端が固体
電解質エレメントとフイルタとの間に挿入され他
端がポンプに接続された測定ガス採取管と、上記
ポンプに接続された除湿器と、一端が除湿器に接
続され他端が固体電解質エレメント内に挿入され
比較電極の近傍まで延在する導管とを備えた。
(Means for Solving the Problem) In order to achieve the above object, the present invention provides a cylindrical solid electrolyte element with one end closed and exhibiting oxygen ion conductivity, and an outer surface of the solid electrolyte element. A measurement electrode is provided on the inner surface of the solid electrolyte element and is in contact with a measurement gas containing oxygen gas and moisture, a comparison electrode is provided on the inner surface of the solid electrolyte element facing the measurement electrode, and the solid electrolyte element, measurement electrode, and comparison electrode are heated. The moisture measuring device consists of a heater provided outside the solid electrolyte element, and a cylindrical filter with one end closed, which covers the solid electrolyte element, measurement electrode, reference electrode, and heater. A measurement gas sampling tube inserted between the filter and the filter and the other end connected to the pump, a dehumidifier connected to the pump, and one end connected to the dehumidifier and the other end inserted into the solid electrolyte element. and a conduit extending close to the electrode.

(作用) 導管の一端から測定ガスをポンプによつて吸引
し、除湿器によつて除湿して得た除湿測定ガスを
比較ガスとして使用することにより、測定電極と
比較電極との間の起電力が測定ガスの水分含有量
と一義的に対応付けられる。
(Function) By sucking the measurement gas from one end of the conduit with a pump and dehumidifying it with a dehumidifier and using the dehumidified measurement gas as a comparison gas, the electromotive force between the measurement electrode and the comparison electrode is reduced. is uniquely associated with the moisture content of the measurement gas.

(実施例) 次に、本考案の実施例を図面に基づき、詳細に
説明する。
(Example) Next, an example of the present invention will be described in detail based on the drawings.

第1図は本考案の測定原理図を示す。第1図A
において体積Vの測定ガスが存在するとし、その
うち酸素の体積がVO,水分の体積がVHであると
する。このとき、酸素濃度(体積百分率)PM
次式で与えられる。
FIG. 1 shows a diagram of the measurement principle of the present invention. Figure 1A
Assume that there is a measurement gas with a volume V at , of which the volume of oxygen is V O and the volume of water is V H. At this time, the oxygen concentration (volume percentage) P M is given by the following formula.

PM=(VO/V)×100(%) …(1) 同様に、水分濃度(体積百分率)yは次式で与
えられる。
P M =(V O /V)×100(%) (1) Similarly, the water concentration (volume percentage) y is given by the following formula.

y=(VH/V)×100(%) …(2) 次に同図Bを参照する。このBは体積Vの測定
ガス中から水分を除去したガスを示す。このと
き、酸素濃度(体積百分率)PVは次式で与えら
れる。
y=( VH /V)×100(%)...(2) Next, refer to FIG. This B indicates a gas obtained by removing moisture from the volume V of the measurement gas. At this time, the oxygen concentration (volume percentage) P V is given by the following formula.

PV={VO/(V−VH)}×100(%) …(3) ここで、第(1)式で示される酸素濃度PMおよび
第(3)式で示される酸素濃度PVを測定し、その結
果から水分濃度yを簡単に測定し得る手段とし
て、本考案者等は固体電解質式酸素分析計に着目
した。すなわち、固体電解質式酸素分析計におい
ては、酸素イオン伝導性を示す固体電解質素子の
両面にそれぞれ多孔質の電極が設けられており、
一方の電極に測定ガスを接触させ、他方の電極に
酸素基準ガスを接触させると、両電極間には測定
ガス中の酸素濃度(酸素分圧)に応じた起電力が
する。本考案者等は、この固体電解質式酸素分析
計の原理に着目し、この酸素分析計により水分濃
度を測定し得ることを見出した。
P V = {V O / (V - V H )} × 100 (%) ... (3) Here, the oxygen concentration P M shown by equation (1) and the oxygen concentration P shown by equation (3) The present inventors focused on a solid electrolyte oxygen analyzer as a means of measuring V and easily determining the water concentration y from the result. In other words, in a solid electrolyte oxygen analyzer, porous electrodes are provided on both sides of a solid electrolyte element that exhibits oxygen ion conductivity.
When one electrode is brought into contact with a measurement gas and the other electrode is brought into contact with an oxygen reference gas, an electromotive force is generated between the two electrodes depending on the oxygen concentration (oxygen partial pressure) in the measurement gas. The present inventors focused on the principle of this solid electrolyte oxygen analyzer and discovered that water concentration can be measured using this oxygen analyzer.

すなわち、固体電解質式酸素分析計において
は、測定ガス中の酸素濃度をP1,酸素基準ガス
中の酸素濃度をP2,そして比例定数をKとする
と、両電極には、次のネルンストの式に基づく起
電力Eが発生する。
In other words, in a solid electrolyte oxygen analyzer, assuming that the oxygen concentration in the measurement gas is P 1 , the oxygen concentration in the oxygen reference gas is P 2 , and the proportionality constant is K, both electrodes have the following Nernst equation: An electromotive force E based on is generated.

E=Klog(P1/P2) …(4) ここで、例えば酸素濃度P1として第(1)式で示
される酸素濃度PMを代入し、また例えば酸素濃
度P2として第(3)式で示される酸素濃度PVを代入
する。
E=Klog(P 1 /P 2 )...(4) Here, for example, as the oxygen concentration P 1 , substitute the oxygen concentration P M shown in equation (1), and for example, as the oxygen concentration P 2 , use equation (3). Substitute the oxygen concentration P V shown in the formula.

E=Klog(PM/PV) =KlogPM−KlogPV =Klog(VO/V)×100− Klog[VO/(V−VH)]×100 =Klog[(V−VH)/V] =Klog[1−(VH/V)] …(5) ここで、第(5)式を第(2)式に代入する。E = Klog (P M / P V ) = Klog P M - Klog P V = Klog (V O /V) x 100 - Klog [V O / (V - V H )] x 100 = Klog [(V - V H ) /V] =Klog[1-(V H /V)] (5) Here, equation (5) is substituted into equation (2).

E=Klog[1−(y/100)] =klog(100−y) …(6) 但し、kは1/100を対数の外に出したことによ
り変化した比例定数である。
E=Klog[1-(y/100)] =klog(100-y)...(6) However, k is a constant of proportionality changed by taking 1/100 out of the logarithm.

第(6)式から明らかなように、固体電解質式酸素
分析計においては、一方の電極に測定ガスを接触
させ、他方の電極にその測定ガスから水分を除去
したガスを接触させると、両電極間に生ずる起電
力Eは測定ガス中の水分濃度yで表わされる。
As is clear from equation (6), in a solid electrolyte oxygen analyzer, when one electrode is brought into contact with the measurement gas and the other electrode is brought into contact with the gas from which water has been removed, both electrodes The electromotive force E generated during this time is expressed by the water concentration y in the measurement gas.

次に、第2図は本発明の一実施例の概略構成図
を示す。図において固体電解質式酸素分析計1に
は、先端が閉鎖され円筒状に形成された固体電解
質素子、本実施例ではジルコニアエレメント2が
設けられる。このジルコニアエレメント2の外面
には測定電極12が設けられ、ダストを除去する
多孔質フイルタ4を経て侵入する測定ガスに接触
する。また、ジルコニアエレメント2の内面には
比較電極13が設けられ、フイルタ10、外気ポ
ンプ11およびジルコニアエレメント2の内部に
挿入された導管9を経て基準ガスとして外気が導
入され、比較電極13に接触する。なお、ジルコ
ニアエレメント2の外部には、ジルコニアエレメ
ント2および測定電極12、比較電極13の領域
を加熱するヒータエレメント3が設置されてい
る。
Next, FIG. 2 shows a schematic configuration diagram of an embodiment of the present invention. In the figure, a solid electrolyte oxygen analyzer 1 is provided with a solid electrolyte element, in this embodiment a zirconia element 2, which is formed into a cylindrical shape with a closed tip. A measuring electrode 12 is provided on the outer surface of this zirconia element 2 and comes into contact with the measuring gas which enters through a porous filter 4 for removing dust. Further, a comparison electrode 13 is provided on the inner surface of the zirconia element 2, and outside air is introduced as a reference gas through the filter 10, the outside air pump 11, and the conduit 9 inserted into the inside of the zirconia element 2, and comes into contact with the comparison electrode 13. . Note that a heater element 3 is installed outside the zirconia element 2 to heat the region of the zirconia element 2, the measurement electrode 12, and the comparison electrode 13.

さらに、フイルタ4内の測定ガスを採取する測
定ガス採取管5は、その一端がフイルタ4内に開
口し、測定ガスポンプ6、除湿器7を経て、測定
ガス・外気切換弁8の測定ガス側への切換えによ
り測定ガスを、導管9を経てジルコニアエレメン
ト2の内部へ導入し、比較電極13に接触させ
る。このジルコニアエレメント2およびフイルタ
4などは取付フランジ14に固定され、この取付
フランジ14により固体電解質式酸素計1は、測
定ガス容器壁15に設置されている。
Further, the measurement gas sampling pipe 5 for sampling the measurement gas in the filter 4 has one end opened into the filter 4, passes through the measurement gas pump 6 and the dehumidifier 7, and then goes to the measurement gas side of the measurement gas/outside air switching valve 8. By switching , the measurement gas is introduced into the zirconia element 2 through the conduit 9 and brought into contact with the comparison electrode 13 . The zirconia element 2, the filter 4, etc. are fixed to a mounting flange 14, and the solid electrolyte oxygen meter 1 is installed on the measuring gas container wall 15 by means of the mounting flange 14.

上述の構成により、測定ガス・外気切換弁8を
測定ガス側へ切換え、外気ポンプ11を停止して
測定ガスポンプ6を起動すれば、ジルコニアエレ
メント2の内部にはフイルタ4内の測定ガスが測
定ガス採取管5により採取され、除湿器7を介し
て除湿された測定ガスが導入され比較電極13に
接触する。従つて、水分を含む測定ガスが接触す
る測定電極12と、除湿された測定ガスが接触す
る比較電極13との間には、測定ガス中の水分含
有量に応じた第(6)式に示す起電力Eが発生する。
第3図に示す増幅器16はこの起電力を増幅し、
変換器17の入力信号とする。この際、変換器1
7の酸素・水分切換スイツチ18は水分側へ切換
えられ、変換器17はこの入力信号を水分含有量
に比例した信号に変換処理する。このようにし
て、測定ガス中の酸素濃度を測定することによ
り、水分含有量が測定される。
With the above configuration, when the measurement gas/outside air switching valve 8 is switched to the measurement gas side, the outside air pump 11 is stopped, and the measurement gas pump 6 is started, the measurement gas in the filter 4 is transferred to the inside of the zirconia element 2. The measurement gas sampled through the sampling tube 5 and dehumidified via the dehumidifier 7 is introduced and comes into contact with the comparison electrode 13 . Therefore, between the measurement electrode 12, which is in contact with the measurement gas containing moisture, and the comparison electrode 13, which is in contact with the dehumidified measurement gas, there is a gap as shown in equation (6) according to the moisture content in the measurement gas. An electromotive force E is generated.
The amplifier 16 shown in FIG. 3 amplifies this electromotive force,
This is the input signal of the converter 17. At this time, converter 1
The oxygen/moisture selector switch 18 of 7 is switched to the moisture side, and the converter 17 converts this input signal into a signal proportional to the moisture content. In this way, the moisture content is measured by measuring the oxygen concentration in the measurement gas.

また、この水分測定装置によつて、測定ガス中
の酸素濃度を測定することができる。測定ガス・
外気切換弁8を外気側へ切換え、外気ポンプ11
を起動すれば、ジルコニアエレメント2の内部に
は、外気(または外気以外の基準ガス)が導入さ
れ、比較電極13に接触する。従つて、測定ガス
が接触する測定電極12と、基準ガスとして外気
が接触する比較電極13との間には、外気中の酸
素濃度を基準とする測定ガス中の酸素濃度に応じ
た第(4)式にて示す起電力Eが発生する。第3図に
示す増幅器16はこの起電力を増幅し変換器17
の入力信号とする。変換器17はこの入力信号を
酸素量のリニヤ信号に変換処理する。このように
して、測定ガスの酸素濃度が測定される。
Furthermore, this moisture measuring device can measure the oxygen concentration in the measurement gas. Measuring gas/
Switch the outside air switching valve 8 to the outside air side, and turn the outside air pump 11 on.
When activated, outside air (or a reference gas other than outside air) is introduced into the zirconia element 2 and comes into contact with the comparison electrode 13. Therefore, between the measurement electrode 12 with which the measurement gas comes into contact and the comparison electrode 13 with which the outside air as a reference gas comes into contact, there is a ) An electromotive force E shown by the equation is generated. An amplifier 16 shown in FIG. 3 amplifies this electromotive force and a converter 17
Let the input signal be The converter 17 converts this input signal into a linear signal representing the amount of oxygen. In this way, the oxygen concentration of the measurement gas is measured.

なお、第3図に示すように測定ガス・外気切換
弁8の切換えおよび測定ガスポンプ6、外気ポン
プ11の起動・停止は、変換器17の酸素・水分
切換スイツチ18の切換操作により、同時に切換
えることも可能である。
As shown in FIG. 3, switching of the measurement gas/outside air switching valve 8 and starting/stopping of the measurement gas pump 6 and the outside air pump 11 can be done simultaneously by switching the oxygen/moisture switching switch 18 of the converter 17. is also possible.

以上に述べるように、固体電解質式酸素計は通
常500度C以上の高温で使用し得るから、高温・
多水分の排ガス等の酸素および水分含有量の測定
に好適である。
As mentioned above, solid electrolyte oxygen meters can usually be used at high temperatures of 500 degrees C or higher.
Suitable for measuring the oxygen and moisture content of high-moisture exhaust gas, etc.

(考案の効果) 以上に説明するように、本考案によれば、固体
電解質式酸素計を適用して、測定電極には酸素お
よび水分が共存する測定ガスを接触させ、比較電
極には除湿された測定ガスを導入し接触させて、
両電極間に生じる起電力により水分濃度を測定す
ることにより、従来の固体電解質式酸素計に測定
ガス採取管、測定ガスポンプ、除湿器を付加する
のみで両電極間に生じる起電力が一義的に測定ガ
ス中の水分含有量に対応付けられる。しかも、こ
のような水分測定装置は、その構成が簡単で、そ
の取扱い操作が容易であるという効果を有する。
(Effects of the invention) As explained above, according to the invention, a solid electrolyte oxygen meter is applied, the measurement electrode is brought into contact with a measurement gas containing oxygen and moisture, and the reference electrode is brought into contact with a dehumidified gas. Introduce and contact the measured gas,
By measuring water concentration using the electromotive force generated between both electrodes, the electromotive force generated between both electrodes can be uniquely measured by simply adding a sample gas sampling tube, a measurement gas pump, and a dehumidifier to a conventional solid electrolyte oxygen meter. Corresponds to the moisture content in the measurement gas. Moreover, such a moisture measuring device has the advantage of being simple in structure and easy to handle.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本考案の測定原理図を示し、同図Aは
酸素および水分を共存する測定ガスの説明図、同
図Bは水分が除去された測定ガスの説明図、第2
図は本考案の一実施例の概略構成図、第3図は測
定ガス・外気切換操作の概略説明図である。 1:固体電解質式酸素計、2:ジルコニアエレ
メント、5:測定ガス採取管、8:測定ガス・外
気切換弁、12:測定電極、13:比較電極。
Figure 1 shows a diagram of the measurement principle of the present invention, Figure A is an explanatory diagram of a measurement gas containing oxygen and moisture, Figure B is an illustration of a measurement gas from which moisture has been removed, and Figure 2 is an illustration of a measurement gas with moisture removed.
The figure is a schematic configuration diagram of an embodiment of the present invention, and FIG. 3 is a schematic explanatory diagram of the measurement gas/outside air switching operation. 1: Solid electrolyte oxygen meter, 2: Zirconia element, 5: Measurement gas sampling tube, 8: Measurement gas/outside air switching valve, 12: Measurement electrode, 13: Reference electrode.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 円筒形にして一端が閉鎖された酸素イオンの導
伝性を示す固体電解質エレメント2と、この固体
電解質エレメントの外面に設けられ酸素ガスおよ
び水分が共存する測定ガスに接触する測定電極1
2と、固体電解質エレメント2の内面に測定電極
12に対向して設けられた比較電極13と、固体
電解質エレメント2,測定電極12および比較電
極13を加熱するべく固体電解質エレメント2の
外側に設けられたヒータ3と、固体電解質エレメ
ント2と測定電極12と比較電極13とヒータ3
とを覆う円筒形にして一端が閉鎖されたフイルタ
4と、からなる水分測定装置において、一端が固
体電解質エレメント2とフイルタ4との間に挿入
され他端がポンプ6に接続された測定ガス採取管
5と、ポンプ6に接続された除湿器7と、一端が
除湿器7に接続され他端が固体電解質エレメント
2内に挿入され比較電極13の近傍まで延在する
導管9とを備え、除湿測定ガスを比較ガスとして
測定ガス中の水分濃度を測定するようになした水
分測定装置。
A solid electrolyte element 2 having a cylindrical shape and having one end closed and exhibiting oxygen ion conductivity, and a measurement electrode 1 provided on the outer surface of the solid electrolyte element and in contact with a measurement gas in which oxygen gas and moisture coexist.
2, a comparison electrode 13 provided on the inner surface of the solid electrolyte element 2 facing the measurement electrode 12, and a comparison electrode 13 provided outside the solid electrolyte element 2 to heat the solid electrolyte element 2, the measurement electrode 12, and the comparison electrode 13. the heater 3, the solid electrolyte element 2, the measurement electrode 12, the comparison electrode 13, and the heater 3.
A moisture measuring device consisting of a cylindrical filter 4 with one end closed and one end of which is inserted between the solid electrolyte element 2 and the filter 4 and the other end connected to a pump 6 for sample gas sampling. A dehumidifier 7 connected to a pump 6, and a conduit 9 whose one end is connected to the dehumidifier 7 and whose other end is inserted into the solid electrolyte element 2 and extends to the vicinity of the reference electrode 13. A moisture measuring device that measures the moisture concentration in a measured gas using the measured gas as a comparison gas.
JP1290082U 1982-02-03 1982-02-03 Moisture measuring device Granted JPS58116652U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1290082U JPS58116652U (en) 1982-02-03 1982-02-03 Moisture measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1290082U JPS58116652U (en) 1982-02-03 1982-02-03 Moisture measuring device

Publications (2)

Publication Number Publication Date
JPS58116652U JPS58116652U (en) 1983-08-09
JPH0230765Y2 true JPH0230765Y2 (en) 1990-08-20

Family

ID=30025441

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1290082U Granted JPS58116652U (en) 1982-02-03 1982-02-03 Moisture measuring device

Country Status (1)

Country Link
JP (1) JPS58116652U (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52126894U (en) * 1976-03-24 1977-09-27

Also Published As

Publication number Publication date
JPS58116652U (en) 1983-08-09

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