JPH0334680Y2 - - Google Patents
Info
- Publication number
- JPH0334680Y2 JPH0334680Y2 JP12404982U JP12404982U JPH0334680Y2 JP H0334680 Y2 JPH0334680 Y2 JP H0334680Y2 JP 12404982 U JP12404982 U JP 12404982U JP 12404982 U JP12404982 U JP 12404982U JP H0334680 Y2 JPH0334680 Y2 JP H0334680Y2
- Authority
- JP
- Japan
- Prior art keywords
- carbon monoxide
- tube
- detection
- light
- sensor
- 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
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 46
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 46
- 238000001514 detection method Methods 0.000 claims description 42
- 238000005192 partition Methods 0.000 claims description 11
- 230000004308 accommodation Effects 0.000 claims description 6
- 238000002845 discoloration Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 description 18
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 150000002940 palladium Chemical class 0.000 description 1
- BHZRJJOHZFYXTO-UHFFFAOYSA-L potassium sulfite Chemical compound [K+].[K+].[O-]S([O-])=O BHZRJJOHZFYXTO-UHFFFAOYSA-L 0.000 description 1
- 235000019252 potassium sulphite Nutrition 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Description
【考案の詳細な説明】
本考案は一酸化炭素濃度測定用センサーに関す
るものである。[Detailed Description of the Invention] The present invention relates to a sensor for measuring carbon monoxide concentration.
一酸化炭素は、天然ガス、都市ガス、プロパン
ガス等の気体燃料、重油、灯油等の液体燃料、石
炭、煉炭等の固体燃料の燃焼に伴つて生成し、特
に酸素の供給量が不足すると顕著となる。 Carbon monoxide is produced during the combustion of gaseous fuels such as natural gas, city gas, and propane gas, liquid fuels such as heavy oil and kerosene, and solid fuels such as coal and briquettes, and is particularly noticeable when the supply of oxygen is insufficient. becomes.
近年における部屋の気密性が高い住宅構造の下
では、ガスコンロ、ガス湯沸機、ガスストーブ、
石油ストーブ、煉炭の燃焼ガス中に含まれる一酸
化炭素により中毒事故、死亡事故が多発してい
る。 In recent years, in housing structures where rooms are highly airtight, gas stoves, gas water heaters, gas stoves,
Poisoning and death accidents are occurring frequently due to carbon monoxide contained in the combustion gas of kerosene stoves and briquettes.
かかる中毒事故、死亡事故を防止すべく、従来
においてもろ紙やシリカゲルに塩化パラジウム溶
液を含浸させたものが、一酸化炭素に接触するこ
とにより変色せしめられることを利用した一酸化
炭素の検出用センサーが知られている。 In order to prevent such poisoning and death accidents, conventional carbon monoxide detection sensors have been developed that utilize the fact that filter paper or silica gel impregnated with palladium chloride solution changes color when it comes into contact with carbon monoxide. It has been known.
しかしながらかかる検出用センサーは、使用環
境中の湿度の影響を受け易く、検出感度が変化す
る欠点を有していた。 However, such detection sensors have the disadvantage that they are easily affected by humidity in the environment in which they are used, and their detection sensitivity varies.
また、一酸化炭素の検出感度の調節は、ろ紙や
シリカゲルへの塩化パラジウム溶液の添加量に依
存するため、その調節範囲に限界があるととも
に、一酸化炭素の濃度を長時間にわたつて測定す
ることは不可能であつた。 In addition, since adjustment of the detection sensitivity of carbon monoxide depends on the amount of palladium chloride solution added to the filter paper or silica gel, there is a limit to the adjustment range, and the concentration of carbon monoxide cannot be measured over a long period of time. That was impossible.
本考案は上述した従来の検出用センサーの欠点
に鑑み、一酸化炭素の検出性能に加え、長時間に
わたる一酸化炭素の平均的な濃度を測定し、警報
の発生を可能ならしめた一酸化炭素濃度測定用セ
ンサーの提供を目的とするものである。 In view of the shortcomings of the conventional detection sensors mentioned above, this invention has a carbon monoxide detection sensor that not only improves the detection performance of carbon monoxide but also measures the average concentration of carbon monoxide over a long period of time and makes it possible to generate an alarm. The purpose is to provide a sensor for measuring concentration.
かかる本考案の目的は一方の端部が開放された
透明な管体を有し、その開放された端部内に通気
性隔壁を配置するとともに、管体内に一酸化炭素
と接触して変色する検知剤を収容してなる一酸化
炭素検知管を、センサー本体に形成した検知管収
容孔に移動可能に取り付けし、センサー本体には
管体の外周に臨ませて発光素子及び受光素子を配
置することにより構成され、一酸化炭素と接触す
ることにより生じる検知剤の変色状態を発光素子
及び受光素子を介して検出することを特徴として
なる一酸化炭素濃度測定用センサーにより達成さ
れる。 The object of the present invention is to have a transparent tube with one end open, and to dispose a breathable partition inside the open end, and to detect discoloration due to contact with carbon monoxide inside the tube. A carbon monoxide detection tube containing a carbon monoxide agent is movably attached to a detection tube accommodation hole formed in the sensor body, and a light emitting element and a light receiving element are arranged in the sensor body so as to face the outer periphery of the tube body. This is achieved by a sensor for measuring carbon monoxide concentration, which is constituted by a sensor for measuring carbon monoxide concentration, which is characterized by detecting the discolored state of a detection agent caused by contact with carbon monoxide through a light-emitting element and a light-receiving element.
以下に本考案の原理及び一実施例を図面を参照
して説明する。 The principle and one embodiment of the present invention will be explained below with reference to the drawings.
第１図は、一端が開口された透明な管体２の内
部に一酸化炭素と接触して変色せしめられる検知
剤３を収容するとともに、開口側に通気性隔壁４
を配置してなる一酸化炭素検知管１を示すもので
ある。一酸化炭素検知管１が一酸化炭素を含有し
ている雰囲気中におかれると、一酸化炭素が通気
性隔壁４を介して検知剤３内に侵入し、その検知
剤３は通気性隔壁４側から徐々に変色せしめられ
る。 FIG. 1 shows a transparent tube 2 with an open end containing a detecting agent 3 that changes color when it comes into contact with carbon monoxide, and an air permeable partition wall 4 on the open side.
This figure shows a carbon monoxide detection tube 1 in which the following are arranged. When the carbon monoxide detection tube 1 is placed in an atmosphere containing carbon monoxide, carbon monoxide enters the detection agent 3 through the air permeable partition wall 4, and the detection agent 3 is transferred to the air permeable partition wall 4. The color gradually changes from the side.
検知剤３の変色層３ａの長さｌは第２図に示す
ように一酸化炭素濃度と時間との相乗積（以下
「時間荷重平均濃度」という。）（ppm・hr）と一
定の相関関係が有ることが既に知られており、本
考案はかかる原理を利用して時間荷重平均濃度を
測定し、警報の発生を可能となした一酸化炭素濃
度測定用センサー１０に関するものである。 As shown in Fig. 2, the length l of the discolored layer 3a of the detection agent 3 has a certain correlation with the multiplicative product of carbon monoxide concentration and time (hereinafter referred to as "time-loaded average concentration") (ppm/hr). It is already known that carbon monoxide concentration exists, and the present invention relates to a sensor 10 for measuring carbon monoxide concentration that uses this principle to measure the time-loaded average concentration and generates an alarm.
一酸化炭素濃度測定用センサー１０は、第３図
に示すように、一端が開口された透明の管体１１
の内部に、塩化パラジウム、硫酸パラジウム、亜
硫酸パラジウムカリウム等のパラジウム塩溶液を
シリカゲルに吸着乾燥してなる検知剤１２を収容
するとともに、その検知剤１２の両側に綿、多孔
質プラスチツク、ポーラスセラミツクス、金網等
からなる通気性隔壁１３ａ，１３ｂを配置してな
る一酸化炭素検知管１４を有している。 As shown in FIG. 3, the sensor 10 for measuring carbon monoxide concentration consists of a transparent tube body 11 with one end open.
A detection agent 12 made by adsorbing and drying a palladium salt solution such as palladium chloride, palladium sulfate, palladium potassium sulfite, etc. on silica gel is housed inside, and on both sides of the detection agent 12 are made of cotton, porous plastic, porous ceramics, etc. A carbon monoxide detection tube 14 is provided with air permeable partition walls 13a and 13b made of wire mesh or the like.
一酸化炭素検知管１４は、センサー本体１５に
形成した検知管収容孔１６内に配置され、またそ
の検知管収容孔１６に連続させて形成したねじ孔
１７には調整ねじ１８が螺着されている。該調整
ねじ１８には、第４図及び第５図に示す如く、４
個の通気孔１８ａが貫通して形成されると共に、
その上端面に連結棒１９が一体的に形成されてい
る。このように構成される調整ねじ１８は、例え
ば第６図に示される回転具３０の先端に形成した
２つの凸部を通気孔１８ａの２ケ所に挿入して回
転することにより検知管収容孔１６のねじ孔１７
に螺着されるのである。該検知管収容孔１６のね
じ孔１７に螺着した調整ねじ１８を上記回転具３
０等により回転させることにより、連結棒１９を
介して通気性隔壁１３ａ、管体１１を検知管収容
孔１６の軸線方向に移動自在としている。また、
検知管１４内に収容された検知剤１２は、前記通
気性隔壁１３ａ及び前記調整ねじに形成した４個
の通気孔１８ａを介してセンサー本体１５の外部
に連通することとなる。 The carbon monoxide detection tube 14 is arranged in a detection tube accommodation hole 16 formed in the sensor body 15, and an adjustment screw 18 is screwed into a threaded hole 17 formed continuously with the detection tube accommodation hole 16. There is. The adjusting screw 18 has four screws as shown in FIGS. 4 and 5.
ventilation holes 18a are formed through the
A connecting rod 19 is integrally formed on its upper end surface. The adjustment screw 18 configured as described above can be adjusted by inserting two protrusions formed at the tip of the rotary tool 30 shown in FIG. screw hole 17
It is screwed onto the The adjusting screw 18 screwed into the screw hole 17 of the detection tube housing hole 16 is inserted into the rotating tool 3.
0 or the like, the air-permeable partition wall 13a and the tube body 11 can be freely moved in the axial direction of the detection tube accommodation hole 16 via the connecting rod 19. Also,
The detection agent 12 housed in the detection tube 14 communicates with the outside of the sensor body 15 via the air permeable partition wall 13a and four ventilation holes 18a formed in the adjustment screw.
センサー本体１５には、管体１１の外周に臨ま
せて発光素子２０及び受光素子２１を配置してい
る。第３図に示す実施例においては発光素子２０
受光素子２１を直線的に配置した場合を示してあ
るが、発光素子２０、受光素子２１間の光路の反
射を利用するように両素子を所定の角度に配置す
ることもできる。 A light emitting element 20 and a light receiving element 21 are arranged in the sensor body 15 so as to face the outer periphery of the tubular body 11. In the embodiment shown in FIG.
Although the case where the light receiving element 21 is arranged linearly is shown, it is also possible to arrange both the light emitting element 20 and the light receiving element 21 at a predetermined angle so as to utilize the reflection of the optical path between them.
次に上述の構成からなる一酸化炭素濃度測定用
センサー１０の使用方法を説明する。 Next, a method of using the carbon monoxide concentration measuring sensor 10 having the above-described configuration will be explained.
調整ねじ１８を回転具３０等により回転させ、
検知剤１２の通気性隔壁１３ａ側の端面から発光
素子２０及び受光素子２１間の光路に至る長さｌ
を、例えば第２図に示す時間荷重平均濃度
200ppm・hrに対応する12mmに調整しておくもの
とする。 Rotate the adjustment screw 18 with a rotating tool 30 or the like,
Length l from the end surface of the detection agent 12 on the side of the air permeable partition wall 13a to the optical path between the light emitting element 20 and the light receiving element 21
For example, the time-weighted average concentration shown in Figure 2
It shall be adjusted to 12mm, which corresponds to 200ppm/hr.
この状態で発光素子２０から受光素子２１に向
けて光を放射しつつ、測定すべき雰囲気中に一酸
化炭素濃度測定用センサー１０を放置する。 In this state, the carbon monoxide concentration measurement sensor 10 is left in the atmosphere to be measured while emitting light from the light emitting element 20 toward the light receiving element 21.
10時間後に検知剤１２の変色層がｌ＝12mmにな
つたとすると、その10時間における一酸化炭素の
平均濃度は20ppmということになる。 Assuming that the discolored layer of the detection agent 12 reaches l=12 mm after 10 hours, the average concentration of carbon monoxide during those 10 hours is 20 ppm.
同様に５時間後にｌ＝12mmになつたとすると、
平均濃度は40ppmということになる。 Similarly, if l = 12mm after 5 hours,
The average concentration is 40ppm.
検知剤１２の変色層がｌ＝12mmになつた状態に
おいては、その変色層により発光素子２０から受
光素子２１に至る光の透過量が変化し、したがつ
てその変化を受光素子２１を介して電気信号に変
換し、警報器（図示せず）を作動させて警報を発
生し得るものである。 When the color changing layer of the detection agent 12 reaches l=12 mm, the amount of light transmitted from the light emitting element 20 to the light receiving element 21 changes due to the color changing layer, and therefore, the change is reflected through the light receiving element 21. It is capable of generating an alarm by converting it into an electrical signal and activating an alarm device (not shown).
時間荷重平均濃度を例えば800（ppm・hr）に調
整するためには、調整ねじ１８を回転具３０等に
より回転させ、長さｌを18mmに選定する。測定開
始後20時間で変色層の長さが18mmに達し、警報が
発生したとすると、その間の平均濃度は40ppmと
なる。 In order to adjust the time-loaded average concentration to, for example, 800 (ppm·hr), the adjusting screw 18 is rotated by a rotating tool 30 or the like, and the length l is selected to be 18 mm. If the length of the discolored layer reaches 18 mm 20 hours after the start of measurement and an alarm is issued, the average concentration during that time will be 40 ppm.
逆に雰囲気中に放置した一酸化炭素検知管１４
をセンサー本体１５から取り外し、その変色層の
長さが15mmであるとすれば、第２図により時間荷
重平均濃度は400ppm・hrと判明し、放置時間が
８時間であつたとすると、その間の平均濃度は
50ppmと算出し得るものである。 On the contrary, carbon monoxide detection tube 14 left in the atmosphere
If it is removed from the sensor body 15 and the length of the discolored layer is 15 mm, the time-weighted average concentration is found to be 400 ppm hr from Figure 2, and if the left time is 8 hours, the average concentration during that time is 400 ppm・hr. The concentration is
This can be calculated as 50ppm.
尚、上述した検知剤１２の変色過程は、一酸化
炭素が通気孔１８ａ、通気性隔壁１３ａを経て検
知剤１２内に侵入し、そこで化学反応が生じて金
属パラジウムを析出して変色することにより行わ
れるものであり、一酸化炭素の存在下では化学反
応が安定して継続され、その再現性も良好であ
る。 The above-mentioned discoloration process of the detection agent 12 is caused by carbon monoxide entering the detection agent 12 through the ventilation hole 18a and the air-permeable partition wall 13a, where a chemical reaction occurs and metallic palladium is precipitated, resulting in discoloration. The chemical reaction continues stably in the presence of carbon monoxide, and its reproducibility is also good.
以上の説明から明らかなように本考案の一酸化
炭素濃度測定用センサーは、一酸化炭素と接触し
て変色せしめられる検知剤を収容した一酸化炭素
検知管をセンサー本体に移動可能に取り付けし、
その管体の外周に臨ませて発光素子及び受光素子
を配置することにより構成したものであるから、
検知剤の端面から発光素子、受光素子間の光路に
至る長さを任意に調整することができ、したがつ
て一酸化炭素濃度と測定時間との相乗積に対応さ
せた広範囲の警報設定が可能となつたものであ
る。 As is clear from the above description, the sensor for measuring carbon monoxide concentration of the present invention has a carbon monoxide detection tube containing a detection agent that changes color when it comes into contact with carbon monoxide, which is movably attached to the sensor body.
Since it is constructed by arranging a light emitting element and a light receiving element facing the outer periphery of the tube,
The length from the end of the detection agent to the optical path between the light-emitting element and the light-receiving element can be adjusted as desired, making it possible to set a wide range of alarms corresponding to the multiplicative product of carbon monoxide concentration and measurement time. It has become.
また、検知剤は管体の開口のみで通気性隔壁を
介して一酸化炭素と接触するように構成したもの
であるから、接触面積が少なくしたがつて雰囲気
中の湿度の影響を受けにくく、信頼性の高い一酸
化炭素濃度測定用センサーを提供し得たものであ
る。 In addition, since the detection agent is configured so that it comes into contact with carbon monoxide only through the opening of the tube and through the breathable partition, the contact area is small, so it is less susceptible to the effects of atmospheric humidity, making it reliable. The present invention provides a sensor for measuring carbon monoxide concentration with high performance.
第１図は本考案の原理を説明するための一酸化
炭素検知管の断面図、第２図は検知剤の変色層の
長さと、一酸化炭素濃度及び時間の相乗積との相
関関係を示すグラフ、第３図は本考案の実施例の
縦断面図、第４図は調整ねじの平面図、第５図は
調整ねじの縦断面図、第６図は回転具の側面図で
ある。
１０……一酸化炭素濃度測定用センサー、１１
……管体、１２……検知剤、１３ａ，１３ｂ……
通気性隔壁、１４……一酸化炭素検知管、１５…
…センサー本体、１６……検知管収容孔、２０…
…発光素子、２１……受光素子。
Figure 1 is a cross-sectional view of a carbon monoxide detector tube to explain the principle of the present invention, and Figure 2 shows the correlation between the length of the discolored layer of the detector and the multiplicative product of carbon monoxide concentration and time. 3 is a longitudinal sectional view of an embodiment of the present invention, FIG. 4 is a plan view of the adjusting screw, FIG. 5 is a longitudinal sectional view of the adjusting screw, and FIG. 6 is a side view of the rotating tool. 10...Sensor for measuring carbon monoxide concentration, 11
... Tube body, 12 ... Detection agent, 13a, 13b ...
Breathable bulkhead, 14... Carbon monoxide detection tube, 15...
...Sensor body, 16...Detection tube accommodation hole, 20...
...Light emitting element, 21... Light receiving element.
Claims (1)
の開放された端部内に通気性隔壁を配置するとと
もに、管体内に一酸化炭素と接触して変色する検
知剤を収容してなる一酸化炭素検知管を、センサ
ー本体に形成した検知管収容孔に移動可能に取り
付けし、センサー本体には管体の外周に臨ませて
発光素子及び受光素子を配置することにより構成
され、一酸化炭素と接触することにより生じる検
知剤の変色状態を発光素子及び受光素子を介して
検出することを特徴としてなる一酸化炭素濃度測
定用センサー。 It has a transparent tube with one end open, a breathable partition is arranged inside the open end, and a detection agent that changes color when it comes into contact with carbon monoxide is housed inside the tube. A carbon monoxide detection tube is movably attached to a detection tube accommodation hole formed in the sensor body, and a light emitting element and a light receiving element are arranged in the sensor body facing the outer periphery of the tube. A sensor for measuring carbon monoxide concentration, which detects the discoloration state of a detection agent caused by contact with carbon through a light-emitting element and a light-receiving element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12404982U JPS5929749U (en) | 1982-08-18 | 1982-08-18 | Sensor for measuring carbon monoxide concentration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12404982U JPS5929749U (en) | 1982-08-18 | 1982-08-18 | Sensor for measuring carbon monoxide concentration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5929749U JPS5929749U (en) | 1984-02-24 |
| JPH0334680Y2 true JPH0334680Y2 (en) | 1991-07-23 |
Family
ID=30282928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12404982U Granted JPS5929749U (en) | 1982-08-18 | 1982-08-18 | Sensor for measuring carbon monoxide concentration |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5929749U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4600888B2 (en) * | 2006-02-20 | 2010-12-22 | 国立大学法人東京工業大学 | Gas detector tube photographing device, gas detector tube measuring device, gas concentration measuring system and method thereof |
| JP5022788B2 (en) * | 2007-06-27 | 2012-09-12 | 佐々木 洋 | CO detection device, composite detection device, and fire alarm device |
| CA2810650C (en) * | 2010-09-07 | 2019-12-03 | Nextteq Llc | System for visual and electronic reading of colorimetric tubes |
-
1982
- 1982-08-18 JP JP12404982U patent/JPS5929749U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5929749U (en) | 1984-02-24 |
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