JPH0434453Y2 - - Google Patents
Info
- Publication number
- JPH0434453Y2 JPH0434453Y2 JP5080784U JP5080784U JPH0434453Y2 JP H0434453 Y2 JPH0434453 Y2 JP H0434453Y2 JP 5080784 U JP5080784 U JP 5080784U JP 5080784 U JP5080784 U JP 5080784U JP H0434453 Y2 JPH0434453 Y2 JP H0434453Y2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- gas
- detection
- detected
- elastic porous
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 40
- 239000003795 chemical substances by application Substances 0.000 claims description 25
- 238000009792 diffusion process Methods 0.000 claims description 13
- 239000003153 chemical reaction reagent Substances 0.000 claims description 9
- 239000011148 porous material Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 43
- 239000000463 material Substances 0.000 description 8
- 238000005259 measurement Methods 0.000 description 7
- 238000005192 partition Methods 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 238000002845 discoloration Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は拡散式ガス濃度検知管に関するもので
あり、殊に屋外や各種作業環境において各種被検
ガスの濃度を、拡散方式により一定時間内の平均
濃度として測定する拡散式ガス濃度検知管に関す
るものである。[Detailed description of the invention] (Field of industrial application) This invention relates to a diffusion type gas concentration detection tube, and is particularly used to measure the concentration of various gases to be detected outdoors or in various work environments within a certain period of time using a diffusion method. This relates to a diffusion type gas concentration detection tube that measures the average concentration of .
（従来技術）
一般に、屋内や屋外での環境保全を目的として
空気中に含まれる各種ガス、例えばC0，C02，
N02，S02，NH3，H2Ｓ，CI2，HCN等のガスの
濃度測定又は検知が行われており、このために各
種の測定器や検知管が用いられている。(Prior art) In general, various gases contained in the air, such as C0, C0 2 ,
Concentrations of gases such as N0 2 , S0 2 , NH 3 , H 2 S, CI 2 , HCN, etc. are measured or detected, and various measuring instruments and detection tubes are used for this purpose.
この種のガス濃度検知管としては、従来、被検
ガスと接触することにより変色する試薬を含浸さ
せた多孔体を担体として透明管内に充填し、その
変色長により被検ガス濃度の判定を行なうものが
あつた。しかしながら、この型式のガス濃度検知
管はガス濃度の測定精度を向上させようとして試
薬の分布密度を高めれば結果的には通気抵抗が大
となるので、自然拡散では不十分となり、従つて
手動又は電動ポンプにより被検ガスを強制通気さ
せる必要性が生じて、作業性が低下し且つコスト
高となる欠陥があつた。この欠陥を克服するため
に、即ち被検ガス自然拡散を容易にするために
紙を担体として試薬を含浸させたガス検知管が提
案され（特開昭57−86049号公報）、又試薬を含浸
させた担体粒子の充填密度を低下させたガス検知
管も市場に出廻つているが、これらは変色部と非
変色部との境界が余り明確なものとは云えず、従
つて測定精度に関して充分に満足し得るものでは
なかつた。 Conventionally, this type of gas concentration detection tube uses a porous material impregnated with a reagent that changes color when it comes into contact with the gas to be detected as a carrier, which is filled into a transparent tube, and the concentration of the gas to be detected is determined based on the length of the color change. Something was warm. However, with this type of gas concentration detection tube, if the distribution density of the reagent is increased in an attempt to improve the measurement accuracy of gas concentration, the ventilation resistance will increase as a result, so natural diffusion is insufficient, and therefore manual or It was necessary to forcibly vent the gas to be tested using an electric pump, which resulted in defects that reduced workability and increased costs. In order to overcome this defect, a gas detection tube in which paper is used as a carrier and is impregnated with a reagent has been proposed (Japanese Patent Application Laid-Open No. 57-86049), in order to facilitate the natural diffusion of the gas to be detected. Gas detection tubes with a lower packing density of carrier particles are also on the market, but the boundaries between the discolored and non-discolored areas are not very clear, and therefore the measurement accuracy is not sufficient. I was not satisfied with that.
（考案の目的）
本考案は従来の拡散式ガス検知管における上述
のような問題に鑑みて、被検ガスの自然拡散によ
る侵入が可能であり、読取りが容易で感度に優
れ、従つて測定精度の向上を達成し得る、拡散式
ガス検知管を提供することを目的としている。(Purpose of the invention) In view of the above-mentioned problems with conventional diffusion-type gas detection tubes, the present invention allows the gas to be detected to enter through natural diffusion, is easy to read, has excellent sensitivity, and improves measurement accuracy. It is an object of the present invention to provide a diffusion type gas detection tube that can achieve improved performance.
（考案の構成）
本考案によれば、上記目的は、少なくとも一方
端部が開放可能となされている透明管の内部に、
通気性の弾性質多孔体と、被検ガスに接触するこ
とにより変色する試薬を含浸させた担体よりなる
検知剤とが上記透明管の長手方向に層をなして配
置されている、拡散式ガス濃度検知管により達成
される。(Structure of the invention) According to the invention, the above object is to provide a transparent tube with at least one end openable.
A diffusion type gas in which a gas permeable elastic porous material and a detection agent made of a carrier impregnated with a reagent that changes color when it comes into contact with the gas to be detected are arranged in layers in the longitudinal direction of the transparent tube. This is accomplished by a concentration detection tube.
本考案による拡散式ガス濃度検知管において、
透明管内の横断面部において弾性質多孔体がその
約半分を占めており且つ検知剤が残余の部分を占
めているようになすのが一般的に有利であるが、
これら両者が透明管内横断面部において占める割
合は弾性質多孔体の通気性や種類、被検ガスの種
類等を考慮して適宣設定することができる。更
に、試薬を含浸保持する担体が粉状、粒状等であ
つて流動性を呈する場合には、その定置保持用に
通気性隔壁を配置することができるのは当然であ
り、この隔壁用素材は、慣用のもの例えば綿、オ
ープンセル型の発泡プラスチツクス等であること
ができる。 In the diffusion type gas concentration detection tube according to the present invention,
It is generally advantageous that the elastic porous material occupies about half of the cross-sectional area within the transparent tube, and the sensing agent occupies the remaining portion.
The ratio of these two components in the cross-sectional area of the inside of the transparent tube can be determined appropriately by taking into account the permeability and type of the elastic porous material, the type of gas to be detected, and the like. Furthermore, if the carrier that impregnates and retains the reagent is in the form of powder, granules, etc. and exhibits fluidity, it is natural that an air-permeable partition wall can be placed to hold it in place. , conventional materials such as cotton, open-cell foamed plastics, etc.
（実施例）
次に、本考案の実施の１例を図面について説明
する。(Example) Next, an example of implementation of the present invention will be described with reference to the drawings.
第１図に示されているように本考案によるガス
濃度検知管１０は透明ガラス製の管１２を匣体と
しており、この管１２の一端１２ａ附近には切込
み１２１が形成されている。管１２の上記端部１
２ａ及び他方端部１２ｂはそれぞれ溶封されてお
り、内部には通気性の弾性質多孔体１４と検知用
の試薬を含浸させた担体よりなる検知剤１６とが
管１２の長手方向に層をなして配置されており、
これらの弾性質多孔体１４と検知剤１６は通気性
隔壁１８ａ，１８ｂにより管１２内の所定位置に
定置保持されている。弾性質多孔体１４としては
オープンセル型のポリエチレン発泡体が使用され
ているが、その素材としてはこれに限られるもの
ではなく、充分な通気性をもたらす材料であり且
つ被検ガスと反応しない材料であれば如何なる素
材でも用いることができる。検知剤１６は被検ガ
スの種類に依存して異なり、例えば被検ガスが塩
素ガスの場合には試薬としてοートリジン（C14
H16N2）を用いこれを担体としてのシリカゲルに
含浸させたものが用いられ、この場合の検知剤の
変色乃至呈色は生成する赤色ホロキノン（C14
H14N2CI2）に基因する橙色である。担体として
は上記のシリカゲル以外にも自体周知のように活
性アルミナ、珪砂等を用いることができる。通気
性隔壁１８ａ，１８ｂ用の素材としては、弾性質
多孔体１４と同様の素材や、他の慣用の素材例え
ば綿、布、吸取紙、多孔質セラミツク、ガラスウ
ール等を用いることができる。 As shown in FIG. 1, the gas concentration detection tube 10 according to the present invention has a transparent glass tube 12 as a housing, and a notch 121 is formed near one end 12a of the tube 12. Said end 1 of tube 12
2a and the other end 12b are each melt-sealed, and inside the tube 12, a layer is formed in the longitudinal direction of the tube 12, and a detecting agent 16 consisting of an air-permeable elastic porous body 14 and a carrier impregnated with a detecting reagent. It is located without
These elastic porous body 14 and detection agent 16 are fixedly held at a predetermined position within the tube 12 by air-permeable partition walls 18a and 18b. Although an open-cell polyethylene foam is used as the elastic porous body 14, the material is not limited to this, and any material that provides sufficient air permeability and does not react with the gas to be detected may be used. Any material can be used. The detection agent 16 differs depending on the type of gas to be detected. For example, when the gas to be detected is chlorine gas, o-tolysine (C 14
H 16 N 2 ) is used and impregnated with silica gel as a carrier. In this case, the discoloration or coloring of the detecting agent is due to the red holoquinone (C 14
The orange color is caused by H 14 N 2 CI 2 ). As the carrier, in addition to the above-mentioned silica gel, activated alumina, silica sand, etc., which are well known per se, can be used. As the material for the breathable partition walls 18a, 18b, the same material as the elastic porous body 14 or other commonly used materials such as cotton, cloth, blotting paper, porous ceramic, glass wool, etc. can be used.
第２図に示されるように、この実施形において
は、管１２内の横断面部の約半分を弾性質多孔体
１４が占め、検知剤１６が爾余の部分を占めてい
るが、その専有割合は弾性質多孔体１４の通気性
や種類、被検ガスの種類、検知剤の感度等のフア
クタを考慮して適宣設定することができる。 As shown in FIG. 2, in this embodiment, the elastic porous body 14 occupies about half of the cross-sectional area inside the tube 12, and the detection agent 16 occupies the remaining portion; can be appropriately set in consideration of factors such as the air permeability and type of the elastic porous body 14, the type of gas to be detected, and the sensitivity of the detection agent.
第３図に示されるように、管１２の外面にはガ
ス濃度目盛１２３が表示されている。この目盛り
１２３は標準ガスを用い検知剤１６の変色長と所
要時間との関係を調べた検量線に基くものであ
り、相乗積（PPm，Hrs）で付されている。 As shown in FIG. 3, a gas concentration scale 123 is displayed on the outer surface of the tube 12. This scale 123 is based on a calibration curve obtained by examining the relationship between the discoloration length of the detecting agent 16 and the required time using a standard gas, and is labeled in terms of multiplicative products (PPm, Hrs).
次に、本考案によるガス濃度検知管の使用方法
について説明する。第１〜３図に示されているよ
うに、所定の検知剤１６がセツトされたガス濃度
検知管１０の匣体である管１２の一端１２ａを切
込み１２１に沿つて折り棄てる。これにより一端
が開放状態にあるガス濃度検知管１０は被検ガス
雰囲気中に曝されることになり、被検ガスの濃度
測定が開始される。被検ガスは自然拡散的に管１
２内に侵入し通気性隔壁１８ａを経て検知剤１６
と直接的に接触し反応して検知剤１６を変色さ
せ、又通気性の弾性質多孔体１４を介して検知剤
１６と接触し反応して検知剤１６を変色させる。
従つて、検知剤１６は入口側の通気性隔壁１８ａ
に近い部分から次第に他方の通気性隔壁１８ｂに
向つて次第に変色してゆくことになる。 Next, a method of using the gas concentration detection tube according to the present invention will be explained. As shown in FIGS. 1 to 3, one end 12a of the tube 12, which is the casing of the gas concentration detection tube 10 in which a predetermined detection agent 16 is set, is folded away along the cut 121. As a result, the gas concentration detection tube 10 with one end open is exposed to the atmosphere of the gas to be detected, and measurement of the concentration of the gas to be detected is started. The test gas naturally diffuses into tube 1.
The detection agent 16 enters into the inside of 2 and passes through the breathable partition wall 18a.
The detection agent 16 is brought into direct contact with and reacts with, causing the detection agent 16 to change color, and also comes into contact with the detection agent 16 via the air-permeable elastic porous body 14 and reacts with the detection agent 16, causing the detection agent 16 to change color.
Therefore, the detection agent 16 is inserted into the air permeable partition wall 18a on the inlet side.
The color will gradually change from the part near to the other air-permeable partition wall 18b.
測定開始から１時間経過後に検知剤１６の変色
長が50の目盛線位置に達したならば、被検ガスの
平均濃度は50ppmと判定され、一方測定開始から
２時間経過後に変色長が100の目盛線位置に達し
たならば、既述のように目盛は相乗積で表示され
ているので、この場合の被検ガスの平均濃度は
100（ppm・Hrs）÷２（Hr）＝50ppm
と判定される。 If the discoloration length of the detection agent 16 reaches the scale line position 50 after one hour has elapsed from the start of measurement, the average concentration of the test gas is determined to be 50ppm, and on the other hand, if the discoloration length reaches the scale line position 100 after two hours have elapsed from the start of measurement. Once the scale line position is reached, the scale is displayed as a multiplicative product as mentioned above, so the average concentration of the sample gas in this case is determined to be 100 (ppm・Hrs) ÷ 2 (Hr) = 50ppm. be done.
（考案の効果）
本考案のガス濃度検知管によれば、弾性質多孔
体と検知剤とが管内で長手方向に層をなした状態
で配置されており、上記弾性質多孔体が被検ガス
の自然的な侵入拡散を容易にしている。従つて、
検知剤自体に関してはその通気抵抗に余り留意を
払う必要性がないので、粒径の小なる担体に延い
ては粉状の担体に試薬を含浸させて検知剤とする
ことができ、その充填密度も高くなすことができ
る。このことは呈色性の比較的低い試薬を用いた
場合にも変色が明確に生起すること、即ちガス濃
度検知管として高感度なものとなし得ることを意
味しており、従つて変色長の読取りが容易であり
測定精度を向上させることができる。慣用の方法
により管に濃度目盛を付しておけば、検知剤層の
変色長の読取りにより被検ガスの平均濃度を定量
的に且つ容易に測定することができる。(Effects of the invention) According to the gas concentration detection tube of the present invention, the elastic porous body and the detection agent are arranged in a layered manner in the longitudinal direction within the tube, and the elastic porous body absorbs the gas to be detected. facilitates natural invasion and spread. Therefore,
As for the detection agent itself, there is no need to pay much attention to its airflow resistance, so it is possible to use small-sized carriers as a detection agent by impregnating a powdered carrier with the reagent, and its packing density It can also be made higher. This means that even when a reagent with relatively low coloring property is used, a clear color change occurs, which means that it can be made into a highly sensitive gas concentration detection tube. It is easy to read and can improve measurement accuracy. If a concentration scale is attached to the tube by a conventional method, the average concentration of the gas to be detected can be quantitatively and easily measured by reading the discoloration length of the detecting agent layer.
尚、図示された実施例では両端が溶封され、折
切り用の切込みの形成されたガラス管が使用され
ているが、溶封及び切込み形成の代りにガス不透
過性で弾性を有するゴム製又はプラスチツクス製
キヤツプを使用することができ、これによつて製
造附帯設備の軽減をもたらすことができる。更
に、コスト的に許されるならば、管自体の素材も
ガラスに代えてガス不透過性の透明プラスチツク
スとなすことができ、これによつて落下等による
折損の可能性を排除することができる。 In the illustrated embodiment, a glass tube with both ends melt-sealed and a notch for breaking is used. Alternatively, a plastic cap can be used, thereby reducing the amount of manufacturing equipment required. Furthermore, if cost permits, the material of the tube itself can be made of gas-impermeable transparent plastic instead of glass, thereby eliminating the possibility of breakage due to falling etc. .
図面は本考案による拡散式ガス濃度検知管の一
例を示すものであつて、第１図は長手方向縦断面
図、第２図は第１図中の−線に沿い拡大尺に
て示した断面図、第３図は平面図である。
１０……拡散式ガス濃度検知管、１２……管、
１２ａ……開放可能な端部、１４……弾性質多孔
体、１６……検知剤、１８ａ，１８ｂ……通気性
隔壁。
The drawings show an example of a diffusion type gas concentration detection tube according to the present invention, in which Fig. 1 is a longitudinal cross-sectional view, and Fig. 2 is a cross-sectional view taken along the - line in Fig. 1 on an enlarged scale. FIG. 3 is a plan view. 10... Diffusion type gas concentration detection tube, 12... Tube,
12a...Openable end, 14...Elastic porous body, 16...detecting agent, 18a, 18b...breathable partition wall.
Claims (1)
る透明管の内部に、通気性の弾性質多孔体と、
被検ガスに接触することにより変色する試薬を
含浸させた担体よりなる検知剤とが上記透明管
の長手方向に層をなして配置されていることを
特徴とする、拡散式ガス濃度検知管。 (2) 透明管内の横断面部において弾性質多孔体が
その約半分を占めており且つ検知剤が残余の部
分を占めていることを特徴とする、実用新案登
録請求の範囲第１項に記載の拡散式ガス濃度検
知管。[Claims for Utility Model Registration] (1) A transparent tube with at least one end openable, with an air permeable elastic porous body inside the transparent tube;
A diffusion type gas concentration detection tube, characterized in that a detection agent made of a carrier impregnated with a reagent that changes color when it comes into contact with a gas to be detected is arranged in layers in the longitudinal direction of the transparent tube. (2) The utility model according to claim 1, characterized in that the elastic porous material occupies about half of the cross-sectional area of the transparent tube, and the detection agent occupies the remaining portion. Diffusion type gas concentration detection tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5080784U JPS60163365U (en) | 1984-04-09 | 1984-04-09 | Diffusion type gas concentration detection tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5080784U JPS60163365U (en) | 1984-04-09 | 1984-04-09 | Diffusion type gas concentration detection tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60163365U JPS60163365U (en) | 1985-10-30 |
| JPH0434453Y2 true JPH0434453Y2 (en) | 1992-08-17 |
Family
ID=30569284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5080784U Granted JPS60163365U (en) | 1984-04-09 | 1984-04-09 | Diffusion type gas concentration detection tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60163365U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3729080A1 (en) * | 1987-09-01 | 1989-03-16 | Draegerwerk Ag | DIFFUSION COLLECTOR WITH A CONVERSION ZONE |
| JP6828912B2 (en) * | 2019-06-12 | 2021-02-10 | 株式会社ガステック | Oxygen detector tube |
-
1984
- 1984-04-09 JP JP5080784U patent/JPS60163365U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60163365U (en) | 1985-10-30 |
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