JPH04134236A - Leaking liquid sensor - Google Patents

Leaking liquid sensor

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Publication number
JPH04134236A
JPH04134236A JP25992490A JP25992490A JPH04134236A JP H04134236 A JPH04134236 A JP H04134236A JP 25992490 A JP25992490 A JP 25992490A JP 25992490 A JP25992490 A JP 25992490A JP H04134236 A JPH04134236 A JP H04134236A
Authority
JP
Japan
Prior art keywords
liquid
cleaning agent
region
metal foil
color
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.)
Granted
Application number
JP25992490A
Other languages
Japanese (ja)
Other versions
JPH0765948B2 (en
Inventor
Yasuyuki Maruyama
丸山 泰之
Tsutomu Murao
勉 村尾
Tamotsu Kobori
小堀 保
Shinichi Ono
信一 小野
Teruyoshi Honoki
朴木 照義
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tatsuta Electric Wire and Cable Co Ltd
Original Assignee
Tatsuta Electric Wire and Cable Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tatsuta Electric Wire and Cable Co Ltd filed Critical Tatsuta Electric Wire and Cable Co Ltd
Priority to JP25992490A priority Critical patent/JPH0765948B2/en
Publication of JPH04134236A publication Critical patent/JPH04134236A/en
Publication of JPH0765948B2 publication Critical patent/JPH0765948B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

PURPOSE:To visually differentiate a leaking position of an objective detecting liquid, such as saltwater, from leakage of water of a cleaning agent by setting a discoloration region of a basic indicator to include a pH region of an objective detecting liquid after electrolysis and not to include a pH region of a cleaning agent for cleaning a pH region of a cleaning agent for cleaning an objective detecting area. CONSTITUTION:A leaking liquid sensor 1 comprises a metal foil 2, a conductive coating material 3 printed on the metal foil 2 and a liquid-absorbing sheet-like body 2 attached thereon. When a pH of an objective detection liquid after electrolysis is below a discoloration region, an acid color is exhibited, when it exceeds the discoloration region, a basic color as the indication color is exhibited, and when it is within the discoloration region, a mixed color of the two is exhibited. That is, if an objective detecting liquid is saltwater, it becomes strong alkaline reaching the discoloration region after electrolysis. However, because a cleaning agent is normally weak alkaline or weak acid, not containing an electrolyte, and does not discolor, the differentiation between a corrosive objective sensing liquid and a cleaning agent can be performed by the visual confirmation.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、検知対象液特に食塩水又は塩の水溶液(以下
塩水という)等の電解!溶液が床面等に漏れた場合、非
電解質溶液である普通の水漏れや床面等の洗浄に用いる
洗浄剤の散布と区別し、且つその漏れた場所を迅速に発
見することのできるJ従来の技術〕 近年、魚介類等を生きたまま輸送することが多く行われ
るようになり、そのため多くの塩水を貯溜する塩水タン
クが輸送の場で使用されるようになった。通常の貨物車
両であれば、この塩水タンクから塩水が多少床面等に漏
れても、気が付いた時点で漏れを止め、漏れた塩水は洗
い流せばよいようになっている。しかし、航空機による
輸送の場合は、航空機を構成する材料とその構造の制限
から、塩水の漏れを即刻検出して対応する必要がある。
[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to the electrolysis of a liquid to be detected, especially a saline solution or an aqueous salt solution (hereinafter referred to as salt water). If a solution leaks onto a floor surface, etc., it can be distinguished from an ordinary water leak that is a non-electrolyte solution or the spraying of a cleaning agent used for cleaning floors, etc., and the location of the leak can be quickly found. [Technology] In recent years, it has become common to transport seafood, etc. alive, and therefore salt water tanks that store large amounts of salt water have come to be used at transportation sites. In a normal freight vehicle, even if some salt water leaks from the salt water tank onto the floor, the leak can be stopped as soon as the leak is noticed and the leaked salt water can be washed away. However, when transporting by aircraft, it is necessary to immediately detect and respond to leaks of salt water due to limitations in the materials and structures that make up the aircraft.

すなわち、航空機等のように機体構成材料の腐食等によ
る劣化が重大事故につながるおそれのある場合は、それ
を未然に防止するため、漏れを早期に発見して完全に洗
い流す必要がある。
In other words, in cases such as aircraft where deterioration due to corrosion or the like in aircraft body constituent materials may lead to serious accidents, it is necessary to discover leaks early and completely flush them out in order to prevent them from occurring.

このような、液体の漏れを検出する漏液センサとしては
、水、油等の液体の漏れを検出する漏液センサを転用す
ることができる。例えば、二本の導線間に漏洩したこれ
らの液体が浸入した場合、その電気抵抗や静電容量の変
化を電気的に検知することにより漏れを検出するものが
ある(例えば、実公昭06 43940号公報参照)。
As such a liquid leakage sensor that detects liquid leakage, a liquid leakage sensor that detects liquid leakage such as water or oil can be used. For example, if these leaked liquids enter between two conductive wires, there are devices that detect the leakage by electrically detecting changes in the electrical resistance or capacitance (for example, Utility Model No. 06 43940). (see official bulletin).

そして、その場所を特定するためには、二本の導線間に
更に位置検出線を添設して、区間検知法等でその場所を
特定するものがある。
In order to specify the location, there is a method that further attaches a position detection line between the two conductive wires and uses a section detection method or the like to specify the location.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

従来の技術で説明した電気的な漏液センサは、通電等の
電気的手段を用いるためその解析と表示のためには複雑
な電気制御機器を必要する。そのため、常に良好な作動
状態を保つためには、熟練した操作員による保守点検が
必要であるという問題点がある。また、防爆その他の安
全上電気的手段の使用が禁じられている場合には使えな
い、さらに、塩水だけを検知し、普通の水や床面等の洗
浄剤を検知しないようにするためには、ますます複雑な
電気的装置が必要となる。上述した航空機による輸送の
ような場合、複雑な操作を要する漏液センサは不向きで
あり、素人が一目して発見可能か又は簡単な確認動作で
塩水の漏れとその場所を特定する例えば使い捨てのよう
な簡単な構造の漏液センサが望まれてδす、また、電気
的手段の使用自体が好まじくない。
The electrical leakage sensor described in the prior art uses electrical means such as energization, and therefore requires complex electrical control equipment for analysis and display. Therefore, there is a problem in that maintenance and inspection by skilled operators are required to maintain good operating conditions at all times. In addition, it cannot be used in cases where the use of electrical means is prohibited for explosion-proof or other safety reasons.Furthermore, in order to detect only salt water and not detect ordinary water or cleaning agents on the floor etc. , increasingly complex electrical equipment is required. In cases such as the above-mentioned transportation by aircraft, leakage sensors that require complicated operations are not suitable, and sensors that can be detected at a glance by an amateur or that can identify saltwater leaks and their locations with a simple confirmation operation, such as disposable ones, are not suitable. A liquid leakage sensor with a simple structure is desired, and the use of electrical means itself is not desirable.

本発明は、従来の技術の有するこのような問題点に鑑み
てなされたものであり、目視で塩水等の検知対象液の漏
れ箇所を水や洗浄剤の漏れと区別して目視発見でき使い
捨ても可能で簡単な構造の漏液センサを提供しようとす
るものである。
The present invention has been made in view of the above-mentioned problems of the conventional technology, and can visually detect the leakage point of a detection target liquid such as salt water by distinguishing it from a leakage of water or a cleaning agent, and is also disposable. The present invention aims to provide a liquid leakage sensor with a simple structure.

[課題を解決するための手段] 上記目的を達成するために、本発明の漏液センサは、金
属箔上に、前記金属箔とは検知対象液に対する電極電位
の異なる金属粉を含有する導電性塗料を帯状、格子状又
は水玉模様のように離散的に印刷し、更にその上に酸塩
基指示薬を含浸させた吸液性面状体を貼着して成り、前
記酸塩基指示薬の変色範囲は検知対象液の電解後のPH
範囲を含み、検知対象区域を洗浄する洗浄剤のPH範囲
を含まないものである。
[Means for Solving the Problems] In order to achieve the above object, the liquid leakage sensor of the present invention includes a conductive metal powder containing metal powder having an electrode potential different from that of the metal foil with respect to the liquid to be detected, on a metal foil. The paint is discretely printed in the form of a strip, a grid, or a polka dot pattern, and a liquid-absorbing sheet material impregnated with an acid-base indicator is adhered thereon, and the discoloration range of the acid-base indicator is PH after electrolysis of detection target liquid
range, but does not include the PH range of the cleaning agent used to clean the area to be detected.

〔作用〕[Effect]

検知対象液の塩水が漏れると吸液性面状体にしみ込んで
いく。この吸液性面状体の下は、金属箔上にその金属箔
とは電極電位が異なる導電性塗料が帯状、格子状又は水
玉模様のように離散的に印刷されているので、塩水が面
状体の下部までしみ渡ると金属箔と導電性塗料との間に
電極電位の差が生じ面状体中に含浸された塩水を通して
電流が流れ、塩水が電気分解され、電極電位の高い側に
強アルカリのNaOHが形成される。また、面状体には
酸塩基指示薬(アルカリの場合は塩基指示薬)が含浸さ
れているので、このNaOHと塩基指示薬が反応して指
示色を呈する。一方、非電解質の水は漏れてもしみ込ん
でいくだけで発色しない、また、床面等を洗浄する洗浄
剤が流れ込んでも、洗浄剤は弱アルカリ性又は弱酸性で
あってPHがそれほど変化しないので、そのPH範囲で
は酸塩基指示薬は変色しない、したがって、検知対象と
する塩水が洩れた場合だけ、指示色を呈し、漏れとその
位置が一目で判るように表示する。
When salt water, the liquid to be detected, leaks, it soaks into the liquid-absorbing planar body. Underneath this liquid-absorbing sheet, conductive paint with a different electrode potential from that of the metal foil is discretely printed on the metal foil in the form of strips, grids, or polka dots, so salt water can When it penetrates to the bottom of the sheet, a difference in electrode potential occurs between the metal foil and the conductive paint, and a current flows through the salt water impregnated in the sheet, electrolyzing the salt water and moving it to the side with a higher electrode potential. Strongly alkaline NaOH is formed. Further, since the planar body is impregnated with an acid-base indicator (a base indicator in the case of an alkali), this NaOH and the base indicator react to exhibit an indicator color. On the other hand, even if non-electrolyte water leaks, it just soaks in and does not develop color.Also, even if a cleaning agent used to clean floors etc. flows in, the cleaning agent is weakly alkaline or acidic and the pH does not change much. The acid-base indicator does not change color in that pH range, so it takes on an indicator color only when the salt water to be detected leaks, allowing the leak and its location to be displayed at a glance.

〔実施例〕〔Example〕

以下、図面に基づいて本発明の詳細な説明する− 第1図は漏液センサの斜視図、第2図は漏液センサの使
用状態を示す図である。
Hereinafter, the present invention will be described in detail based on the drawings. FIG. 1 is a perspective view of a liquid leakage sensor, and FIG. 2 is a diagram showing the usage state of the liquid leakage sensor.

第1図において、漏液センサ1は、金属箔2と、金属箔
2上に印刷された導電性塗料3と、更にこれらの上に貼
着された吸液性面状体4とから成るものである。
In FIG. 1, a liquid leakage sensor 1 consists of a metal foil 2, a conductive paint 3 printed on the metal foil 2, and a liquid-absorbing sheet 4 stuck on top of these. It is.

金属箔2としては、例えばアルミ箔のように、錆発生の
恐れがなく比較的安価なものが用いられる。
As the metal foil 2, a relatively inexpensive material such as aluminum foil, which is free from rust, is used.

導電性塗料3としては、検知対象液に対して金属箔2と
は電極電位が異なる金属粉を含有するものが用いられる
。金属箔2がアルミの場合には、銅粉式導電性塗料が最
適である。このような銅粉式導電性塗料には、特開平1
−167385号公報に開示されるような、■金属銅粉
100重量部と、■メラミン樹脂35〜50重量%とポ
リエステル系樹脂20〜35重量%とレゾール型フェノ
ール樹脂15〜30重量%とから成る樹脂混和物10〜
25重量部と、■脂肪酸又は脂肪酸の金属塩0.1〜2
重量部と、■キレート形成剤0.5〜4重量部とを配合
して成る導電性塗料がある。
As the conductive paint 3, one containing metal powder having an electrode potential different from that of the metal foil 2 with respect to the liquid to be detected is used. When the metal foil 2 is aluminum, a copper powder type conductive paint is most suitable. Such copper powder type conductive paint is disclosed in Japanese Unexamined Patent Publication No.
-100 parts by weight of metallic copper powder, ■35-50% by weight of melamine resin, 20-35% by weight of polyester resin, and 15-30% by weight of resol-type phenolic resin, as disclosed in Japanese Patent Publication No. 167385. Resin mixture 10~
25 parts by weight, and ■ 0.1 to 2 fatty acids or metal salts of fatty acids.
There is a conductive coating material which is made by blending 1.0 parts by weight with 0.5 to 4 parts by weight of a chelate forming agent.

第1図示のように、導電性塗料3は金属7f32上に帯
状(例えば幅約5はのものを間隔約5mで配置したもの
)に印刷後、焼成されている。印刷は転写ローラ等によ
り簡単に連続して行うことができ、焼成は上記組成の導
電性塗料であれば、約160°Cで約30分間の炉内焼
成でよい。
As shown in the first figure, the conductive paint 3 is printed on the metal 7f32 in the form of a strip (for example, strips about 5 in width arranged at intervals of about 5 m) and then fired. Printing can be easily and continuously carried out using a transfer roller or the like, and baking can be carried out in a furnace at about 160° C. for about 30 minutes if the conductive paint has the above composition.

なお、金属箔2上の導電性塗料3の配置は第1図示の帯
状に限らず、格子状や水玉模様でもよく、要するに離散
的に配置されており、二点鎖線で示される検知対象液が
吸液性面状体4にしみ込んだ時、金属箔2と導電性塗料
3間の境界部分にまたがってにじみわたることができる
配置であればよい つぎに、導電性塗料3を印刷した金属箔2上に貼着され
る吸液性面状体4の例としては、以下に述べる酸塩基指
示薬を含浸させた吸液性の布が用いられる。吸液性の布
としては、ポリメタフェニレンイソフタルアミドを主成
分とする有機合成繊維〔例えば、帝人株式会社のコーネ
ックス(登録商標)]が使用できる。すなわち、このコ
ーネノクスは耐熱性、難燃性に優れており、航空機等の
ように厳しい耐熱性、難燃性が要求される場所に使用す
ることができる。なお、布を構成する糸についてはコー
ネソクスに限らずテトロンなどの吸液性に優れ酸塩基指
示薬を含浸できるマルチフィラメント糸やスパン糸等の
ものが選定される。また、布に限らず吸液可能なプラス
チンクテープであってもよい。そして、このような吸液
性面状体4は非水溶性の接着剤[例えばコニシ(株)製
の合成ゴム接着剤ボンドG17]でアルミ箔2上に貼着
される。
The arrangement of the conductive paint 3 on the metal foil 2 is not limited to the strip shape shown in the first figure, but may also be in the form of a grid or in a polka dot pattern. The arrangement should be such that it can spread across the boundary between the metal foil 2 and the conductive paint 3 when it soaks into the liquid-absorbing sheet 4. Next, the metal foil 2 on which the conductive paint 3 is printed. As an example of the liquid-absorbing planar body 4 to be adhered thereon, a liquid-absorbing cloth impregnated with an acid-base indicator described below is used. As the liquid-absorbing cloth, an organic synthetic fiber containing polymetaphenylene isophthalamide as a main component (for example, Conex (registered trademark) manufactured by Teijin Ltd.) can be used. That is, this Cornenox has excellent heat resistance and flame retardancy, and can be used in places where strict heat resistance and flame retardance are required, such as in aircraft. Note that the threads constituting the cloth are not limited to Cornesox, but multifilament threads such as Tetron, which have excellent liquid absorption properties and can be impregnated with acid-base indicators, and spun threads are selected. Furthermore, the tape is not limited to cloth, and may be a plastic tape that can absorb liquid. Then, such a liquid-absorbing planar body 4 is adhered onto the aluminum foil 2 with a water-insoluble adhesive (for example, synthetic rubber adhesive Bond G17 manufactured by Konishi Co., Ltd.).

つぎに、吸液性の布に含浸される酸塩基指示薬としては
、例えば第1表に示すものが用いられる。
Next, as the acid-base indicator impregnated into the liquid-absorbing cloth, for example, those shown in Table 1 are used.

電解後の検知対象液のPHが変色範囲未満のときには酸
性色、変色範囲を越えたときには指示色である塩基性色
を呈し、変色範囲内ではそれらの混合色を呈する。すな
わち、検知対象液が食塩であれば、電解後に変色範囲に
至る強アルカリとなる。
When the pH of the detection target liquid after electrolysis is below the discoloration range, it exhibits an acidic color, when it exceeds the discoloration range, it exhibits a basic color, which is an indicator color, and within the discoloration range, it exhibits a mixed color. That is, if the liquid to be detected is salt, it becomes a strong alkali that reaches the discoloration range after electrolysis.

しかし、洗浄剤は通常弱アルカリ性又は弱酸性で電解質
を含まず、変色しないので、腐食性の検知対象液と洗浄
剤を区分して目視確認できる。
However, since cleaning agents are usually weakly alkaline or acidic, do not contain electrolytes, and do not change color, it is possible to distinguish and visually confirm the corrosive liquid to be detected and the cleaning agent.

第1表 アルカリブルーは、ツクシンに例えば安息香酸またはバ
ナジウム触媒の存在下にアニリンを縮合させ、低温でス
ルフォン化して得られる染料である。アリザリンブルー
は、例えばアントラキノン2−スルホン酸ナトリウムを
アルシカリン容解し、硫酸で中和して得られる染料であ
る。インジゴカルミンは、例えばインジゴを濃硫酸また
は軽度の発煙硫酸を用いてスルホン化して得られる染料
である。
Table 1 Alkali blue is a dye obtained by condensing aniline with tuxin in the presence of benzoic acid or a vanadium catalyst, and sulfonating the resulting product at low temperature. Alizarin blue is a dye obtained, for example, by dissolving sodium anthraquinone 2-sulfonate in alsicarin and neutralizing it with sulfuric acid. Indigo carmine is a dye obtained, for example, by sulfonating indigo with concentrated sulfuric acid or mild oleum.

つぎに、上述した構成の漏液センサ1の作動を第1図に
より説明する。
Next, the operation of the liquid leakage sensor 1 having the above-described structure will be explained with reference to FIG.

第1図において、矢印Aの部分に検知対象液の塩水が漏
れたとすると、その塩水は吸液性面状体4にしみ込む。
In FIG. 1, if salt water, which is the liquid to be detected, leaks in the area indicated by arrow A, the salt water soaks into the liquid-absorbing planar body 4.

そして、導電性塗料3と金属箔2の双方にまたがって広
がっていく。したがって、金属箔2と導電性塗料3間の
境界部分に電極電位の差が生し電流が流れる。そして、
電解質溶液である塩水が電気分解され、電極電位の高い
側に強アルカリのNaOHが形成される。また、面状体
には酸塩基指示薬(アルカリの場合は塩基指示薬)が含
浸されているので、このNaOHと塩基指示薬が反応し
て指示色を呈する。一方、非電解質溶液の水や洗浄剤は
漏れてもしみ込んでいくだけで発色しない。そこで、所
定の検知対象液が漏れたことが一目で判別できる。なお
、この種漏液センサとして、検知対象液の塩水に対する
電極電位が異なる二種の線状金属を酸塩基性指示薬を含
浸させた面状体で挟持したもの、例えば銅線とアルミ線
を平行状に並設したものを使用する場合には、銅線とア
ルミ線をその一端で短絡させないと、電流が流れず電気
分解が起こらない、しかし、本発明の構造のものは、こ
のような電気的接続を必要としない。さらに、金属箔上
への導電性塗料の印刷及び吸液性面状体の貼着という簡
単な構成であるので、連続生産等が可能である。
Then, it spreads over both the conductive paint 3 and the metal foil 2. Therefore, a difference in electrode potential occurs at the boundary between the metal foil 2 and the conductive paint 3, and a current flows. and,
Salt water, which is an electrolyte solution, is electrolyzed and strong alkaline NaOH is formed on the side where the electrode potential is higher. Further, since the planar body is impregnated with an acid-base indicator (a base indicator in the case of an alkali), this NaOH and the base indicator react to exhibit an indicator color. On the other hand, if non-electrolyte solution water or cleaning agent leaks, it simply soaks in and does not produce color. Therefore, it can be determined at a glance that a predetermined detection target liquid has leaked. This type of liquid leakage sensor is made by sandwiching two types of wire metals with different electrode potentials with respect to salt water, which is the liquid to be detected, between planar bodies impregnated with an acid-base indicator, such as a copper wire and an aluminum wire in parallel. When using wires arranged side by side in a shape, unless the copper wire and aluminum wire are short-circuited at one end, current will not flow and electrolysis will not occur. does not require physical connection. Furthermore, since the structure is simple, consisting of printing a conductive paint onto a metal foil and pasting a liquid-absorbing sheet, continuous production is possible.

第2図は以上説明した漏液センサの使用状態を示し、第
2図(a)は貨物12全体の下方の床面16に部分的に
敷き詰めた使用例である。このように漏れの発生が予想
される部分の下方にこの漏液センサ13を所定の大きさ
に切断して敷いておけばよい。第2図(b)は塩水タン
ク14の側面に漏液センサ15を貼着した使用例である
。要するに、検知対象液のi路にあたる場所に敷設又は
貼着等により設置すればよい。
FIG. 2 shows how the liquid leakage sensor described above is used, and FIG. 2(a) shows an example in which it is partially spread on the floor 16 below the entire cargo 12. The liquid leakage sensor 13 may be cut to a predetermined size and placed below the area where leakage is expected to occur. FIG. 2(b) shows an example of use in which a leakage sensor 15 is attached to the side surface of the salt water tank 14. In short, it may be installed by laying or pasting at a location corresponding to the i-way of the liquid to be detected.

なお、以上の説明は検知対象液として塩水の場合を説明
したが、検知対象液は塩水のみに限られない、すなわち
、電解質の液体であれば、電極材料と酸塩基指示薬を適
切に選定することによって本発明を適用できる。
Note that the above explanation deals with the case of salt water as the liquid to be detected, but the liquid to be detected is not limited to salt water; in other words, if it is an electrolyte liquid, the electrode material and acid-base indicator should be appropriately selected. The present invention can be applied by

〔発明の効果〕〔Effect of the invention〕

本発明は、以上説明したように構成されているので、次
に記載されるような効果を奏する。
Since the present invention is configured as described above, it produces the following effects.

まず、電気的手段を有しないので安全である。First, it is safe because it does not have electrical means.

そして、検知対象液に対する電極電位が異;る金属箔と
導電性塗料の組み合わせを、酸塩基指示薬で含浸された
吸液性面状体で覆ったものであり、この酸塩基指示薬の
変色範囲は検知対象液の電解後のPHを含み、検知対象
区域を洗浄する洗浄剤のPHを含まないので、検知対象
液である塩水等が漏れると電気分解によりNaOH等が
発生し指示色を呈し、一方、水や洗浄剤がしみ込んでも
指示色を呈しないので、塩水等の漏れた箇所を単なる水
漏れや洗浄剤の散布と区分して一目で確認することがで
き、電気機器等の調整もなく誰でも迅速且つ容易に検出
することができる。さらに、金属箔上への導電性塗料の
印刷及び吸液性面状体の貼着という簡単な構成であるの
で、連続生産が可能で低コストの漏液センサとすること
ができ、使い捨ても可能となる。
The combination of metal foil and conductive paint, which have different electrode potentials with respect to the liquid to be detected, is covered with a liquid-absorbing sheet impregnated with an acid-base indicator, and the color change range of this acid-base indicator is It contains the pH after electrolysis of the detection target liquid, but does not include the pH of the cleaning agent used to clean the detection target area, so if the detection target liquid, such as salt water, leaks, NaOH etc. will be generated due to electrolysis and will take on an indicator color. , even if water or cleaning agent seeps into it, it does not show an indicator color, so you can distinguish leaks of salt water, etc. from simple water leaks or sprayed cleaning agents and check them at a glance, without having to adjust electrical equipment, etc. However, it can be detected quickly and easily. Furthermore, since it has a simple structure of printing conductive paint on metal foil and pasting a liquid-absorbing sheet, it can be manufactured continuously, making it a low-cost liquid leakage sensor, and it can also be disposable. becomes.

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

第1図は漏液センサの斜視図、第2図は漏液センサの使
用状態を示す図である。なお、図面中の主な符号の説明
は下記の通りである。 1.13.15=漏液センサ、 2・・・金属箔、 3・・・導電性塗料、 4・・・吸液性面状体。 第1 因 特許出願人  タック電線株式会社 代理人  弁理士  梶  良 之 第2図 仕り 岩田町2丁目3番1号 タック電線株式会
FIG. 1 is a perspective view of the liquid leakage sensor, and FIG. 2 is a diagram showing the usage state of the liquid leakage sensor. Note that explanations of main symbols in the drawings are as follows. 1.13.15=liquid leakage sensor, 2...metal foil, 3...conductive paint, 4...liquid-absorbing planar body. 1st Patent Applicant Tuck Electric Cable Co., Ltd. Agent Yoshiyuki Kaji Patent Attorney Yoshiyuki Kaji 2-3-1 Iwata-cho 2-3-1 Tac Electric Cable Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] (1)金属箔上に、前記金属箔とは検知対象液に対する
電極電位の異なる金属粉を含有する導電性塗料を帯状、
格子状又は水玉模様のように離散的に印刷し、更にその
上に酸塩基指示薬を含浸させた吸液性面状体を貼着して
成り、前記酸塩基指示薬の変色範囲は検知対象液の電解
後のPH範囲を含み、検知対象区域を洗浄する洗浄剤の
PH範囲を含まないことを特徴とする漏液センサ。
(1) A strip of conductive paint containing metal powder having an electrode potential different from that of the metal foil with respect to the liquid to be detected is placed on the metal foil;
It is printed discretely in a grid or polka dot pattern, and a liquid-absorbing sheet material impregnated with an acid-base indicator is attached on top of the printed pattern, and the discoloration range of the acid-base indicator is the same as that of the liquid to be detected. A leakage sensor characterized in that it includes a PH range after electrolysis, but does not include a PH range of a cleaning agent for cleaning a detection target area.
JP25992490A 1990-09-27 1990-09-27 Leak sensor Expired - Lifetime JPH0765948B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25992490A JPH0765948B2 (en) 1990-09-27 1990-09-27 Leak sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25992490A JPH0765948B2 (en) 1990-09-27 1990-09-27 Leak sensor

Publications (2)

Publication Number Publication Date
JPH04134236A true JPH04134236A (en) 1992-05-08
JPH0765948B2 JPH0765948B2 (en) 1995-07-19

Family

ID=17340822

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25992490A Expired - Lifetime JPH0765948B2 (en) 1990-09-27 1990-09-27 Leak sensor

Country Status (1)

Country Link
JP (1) JPH0765948B2 (en)

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WO2003046501A1 (en) * 2001-11-21 2003-06-05 Before-The-Even Ltd. A liquid leak multi-layer detector
US6865941B2 (en) 2001-11-21 2005-03-15 Before-The-Event, Ltd. Liquid leak detector
JP2008002813A (en) * 2006-06-20 2008-01-10 Mitsubishi Heavy Ind Ltd Construction method of liquid quality sensor, and liquid quality detecting device
JP2012502300A (en) * 2008-09-12 2012-01-26 ザ・ボーイング・カンパニー Fluid detection by on-chip spectrometer
JP2013068420A (en) * 2011-09-20 2013-04-18 Fujifilm Corp Sealing sheet, liquid discharge head using the same and ink jet device
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JP4009623B2 (en) * 2004-08-16 2007-11-21 埼玉日本電気株式会社 Wet detection seal, mobile phone and electronic device using the same
JP6146596B2 (en) * 2013-02-04 2017-06-14 ユミン システム テクノロジー カンパニー,リミテッド Acid solution leak detector

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003046501A1 (en) * 2001-11-21 2003-06-05 Before-The-Even Ltd. A liquid leak multi-layer detector
US6865941B2 (en) 2001-11-21 2005-03-15 Before-The-Event, Ltd. Liquid leak detector
JP2008002813A (en) * 2006-06-20 2008-01-10 Mitsubishi Heavy Ind Ltd Construction method of liquid quality sensor, and liquid quality detecting device
JP4585488B2 (en) * 2006-06-20 2010-11-24 三菱重工業株式会社 Facility method and device for liquid quality sensor
JP2012502300A (en) * 2008-09-12 2012-01-26 ザ・ボーイング・カンパニー Fluid detection by on-chip spectrometer
JP2013068420A (en) * 2011-09-20 2013-04-18 Fujifilm Corp Sealing sheet, liquid discharge head using the same and ink jet device
US8950837B2 (en) 2011-09-20 2015-02-10 Fujifilm Corporation Sealing sheet, and liquid ejection head and inkjet apparatus using same
CN110082043A (en) * 2018-01-25 2019-08-02 施乐公司 Water inlet indicator for electronic device

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