KR100435335B1 - Electrode compositions of Fuel Sender for automotible - Google Patents

Electrode compositions of Fuel Sender for automotible Download PDF

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KR100435335B1
KR100435335B1 KR10-2002-0001671A KR20020001671A KR100435335B1 KR 100435335 B1 KR100435335 B1 KR 100435335B1 KR 20020001671 A KR20020001671 A KR 20020001671A KR 100435335 B1 KR100435335 B1 KR 100435335B1
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fuel
electrode
sulfur
fuel sender
silver
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KR10-2002-0001671A
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KR20030060717A (en
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이용성
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현대자동차주식회사
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03Fuel tanks
    • B60K15/077Fuel tanks with means modifying or controlling distribution or motion of fuel, e.g. to prevent noise, surge, splash or fuel starvation
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/32Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
    • G01F23/36Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements using electrically actuated indicating means
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • H01B1/026Alloys based on copper

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  • Engineering & Computer Science (AREA)
  • Sustainable Energy (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Conductive Materials (AREA)
  • Adjustable Resistors (AREA)

Abstract

본 발명은 연료 센더의 전극 재료 조성물에 대한 것으로서, 더욱 상세하게는 은을 주재료로 하는 연료 센더의 전극재료에 구리와 세륨을 첨가시켜 절연피막의 생성을 감소시키므로써 연료 게이지 지침의 오작동을 감소시킨 황 부식을 방지하는 연료 센더의 전극 재료 조성물에 관한 것이다.The present invention relates to an electrode material composition of a fuel sender, and more particularly, copper and cerium are added to an electrode material of a fuel sender mainly containing silver, thereby reducing the formation of an insulating film, thereby reducing malfunction of the fuel gauge guide. An electrode material composition of a fuel sender to prevent sulfur corrosion.

Description

연료 센더의 전극 재료 조성물{Electrode compositions of Fuel Sender for automotible}Electrode compositions of Fuel Sender for automotible

본 발명은 연료 센더의 전극 재료 조성물에 대한 것으로서, 더욱 상세하게는 은을 주재료로 하는 연료 센더의 전극재료에 구리와 세륨을 첨가시켜 절연피막의 생성을 감소시키므로써 연료 게이지 지침의 오작동을 감소시킨 황 부식을 방지하는 연료 센더의 전극 재료 조성물에 관한 것이다.The present invention relates to an electrode material composition of a fuel sender, and more particularly, copper and cerium are added to an electrode material of a fuel sender mainly containing silver, thereby reducing the formation of an insulating film, thereby reducing malfunction of the fuel gauge guide. An electrode material composition of a fuel sender to prevent sulfur corrosion.

차량 연료게이지의 연료량 표시는 연료 탱크 내에서 연료의 유면을 따라서 연동하는 뜨게와 구조적으로 연결된 가변저항회로에서 변화하는 전기 저항 값을 클러스터로 송신함으로써 이루어진다. 여기서 뜨게 및 뜨게와 구조적으로 연결된 가변저항회로를 연료 센더라 한다. 연료 센더의 가변 저항부는 일정한 전기 비저항 값을 가지는 저항물질이 특정형태로 절연 세라믹 기판상에 인쇄되어 있으며,이러한 저항물질의 저항 값을 검출하기 위해서 저항물질과 전기적으로 연결된 구조를 가지는 전극이 함께 기판 위에 인쇄되어있다. 또한, 뜨게와 연결된 막대의 끝 단은 세라믹 기판이 고정되어 있는 몸체에 고정되고, 고정축은 회전이 가능하도록 되어있다.The fuel amount indication of the vehicle fuel gauge is made by transmitting a variable electrical resistance value in a variable resistance circuit structurally connected with a float that interlocks along the oil level in the fuel tank to the cluster. Here, the float and the variable resistance circuit structurally connected to the float are called fuel senders. The variable resistor portion of the fuel sender is printed on the insulating ceramic substrate with a resistive material having a constant electric resistivity value, and an electrode having a structure electrically connected to the resistive material is used to detect the resistive value of the resistive material. Is printed above. In addition, the end of the rod connected to the float is fixed to the body on which the ceramic substrate is fixed, the fixed shaft is to be rotatable.

따라서, 연료량의 유면을 따라서 뜨게가 움직이면, 뜨게와 일체로 연결된 막대가 반대쪽 끝단의 고정축을 중심으로 원호를 그리게 되며, 상기 원호를 그리는 막대의 일부에 접점을 고정시키고, 이 접점과 세라믹 기판상에 인쇄된 전극과 접촉하면서 통전을 하게 된다.Therefore, when the float moves along the oil level of the fuel, the rod integrally connected with the float draws an arc around the fixed axis of the opposite end, and the contact is fixed to a part of the rod drawing the arc, It is energized by contact with the printed electrode.

클러스터로 보내지는 저항값은 해당 연료 유면에 의해 정해지는 전극과 접점의 접촉위치로 결정되는 회로의 저항 값이다.The resistance value sent to the cluster is the resistance value of the circuit determined by the contact position between the electrode and the contact point determined by the fuel level.

가변저항부의 구조를 첨부도면 도 1에 나타내었으며, 도면의 좌측이 연료 센더의 몸체 및 여기에 고정되어 있는 가변 저항부(저항물질 및 전극이 인쇄된 세라믹 기판)이며, 우측은 이러한 전극과 미끄럼 접촉을 하며 통전하는 접점이 부착된 부분이다.The structure of the variable resistor portion is shown in FIG. 1, and the left side of the figure is the body of the fuel sender and the variable resistor portion (a ceramic substrate on which the resistor material and the electrode are printed) fixed thereto, and the right side is in sliding contact with these electrodes. This is the part where the contact is energized.

상기 부품이 작동 시에는 좌측과 우측이 서로 포개어 진 후 양쪽 모두의 하단에 뚫려있는 구멍이 일치되어 이 구멍으로 뜨게가 연결된 회전축이 삽입된다.When the parts are operated, the left and right sides overlap each other, and the holes drilled at the bottom of both sides coincide with each other, and a rotation shaft connected to the float is inserted into this hole.

접점과 전극이 상호 접촉하며 통전이 이루어지는 가변 저항부는 연료탱크 안쪽의 중앙부에 위치하고 있어서, 탱크내의 연료량에 따라서 연료 내에 잠기거나 연료 밖으로 노출되게 된다.The variable resistor portion where the contacts and the electrodes are in contact with each other and is energized is located at the center portion inside the fuel tank, so as to be immersed in or exposed to the fuel, depending on the amount of fuel in the tank.

일반적으로 접점 및 전극의 재질로서 전기전도도가 우수한 은(Ag) 합금계를사용하는데, 통상 은-30 중량% 팔라듐(Pd) 합금계가 많이 사용된다.Generally, a silver (Ag) alloy system having excellent electrical conductivity is used as a material of a contact and an electrode, and silver-30 wt% palladium (Pd) alloy system is generally used.

팔라듐은 은의 기계적 성질을 향상시키며, 또한 연료내의 황(S) 성분에 의한 부식을 방지하기 위하여 첨가되는데, 상기 은에 첨가되는 팔라듐의 양이 40 중량% 이상이 되면 황 부식은 거의 일어나지 않으나, 상대적으로 전기전도도가 감소하기 때문에 20 ∼ 30 중량% 를 첨가한 것을 많이 사용한다.Palladium is added to improve the mechanical properties of silver and to prevent corrosion by the sulfur (S) component in the fuel. When the amount of palladium added to the silver is more than 40% by weight, sulfur corrosion hardly occurs, but relative In order to reduce the electrical conductivity, a large amount of 20 to 30% by weight is used.

접점은 은과 팔라듐 원료를 함께 녹여서 합금화 된 재료를 접점형태로 가공하여 사용하고, 전극은 일정한 패턴으로 세라믹 기판에 인쇄해야 하기 때문에 합금 재료를 미세한 분말로 제조한 후 이를 유기 바인더와 함께 혼합하여 세라믹 기판에 프린팅한 다음 열처리를 통해 세라믹 기판에 고착 시킨다.The contact is processed by melting the silver and palladium raw materials together and processing the alloyed material in the form of contacts.The electrodes must be printed on the ceramic substrate in a regular pattern. After printing on the substrate it is fixed to the ceramic substrate by heat treatment.

상기한 바와 같이 전기전도도의 저하 때문에 은에 첨가하는 팔라듐의 양이 제한되기 때문에 이 부품이 연료 내에서 오랜 시간이 경과하면 황 성분에 의한 부식이 발생하게 된다.As described above, since the amount of palladium added to the silver is limited due to the decrease in the electrical conductivity, corrosion of the sulfur component occurs when the component elapses for a long time in the fuel.

황 성분에 의한 부식은 회로의 구조상 양(+)극을 띄는 전극에서 더욱 심하게 발생되며, 이러한 부식의 결과로 전극의 표면에는 황 화합물로 이루어진 피막이 형성된다.Corrosion caused by the sulfur component occurs more severely at the positive electrode of the circuit structure, and as a result of this corrosion, a film of sulfur compound is formed on the surface of the electrode.

상기 부식의 결과로 형성된 황 화합물의 성분은 주로 황화은(Ag2S)으로서, 이 황화은의 피막은 특히 전기 전도성이 불량하다.The component of the sulfur compound formed as a result of the corrosion is mainly silver sulfide (Ag 2 S), and the film of silver sulfide is particularly poor in electrical conductivity.

접점과 접촉하는 전극의 표면에 전기전도도가 낮은 피막이 형성되면, 접촉저항이 매우 커지기 때문에, 접점과 접촉하는 위치에 따라 의도했던 저항 값과는 다른 값을 나타내게 되고, 접촉저항의 증가로 인해 검출되는 저항 값이 커지면, 클러스터에서 연료 게이지로 보내는 신호가 변화함으로써, 연료 게이지 상의 지침이 현재의 연료량과는 다른 위치를 가르키게 되는 오류가 발생하게 된다.When a film having a low electrical conductivity is formed on the surface of the electrode in contact with the contact, the contact resistance becomes very large, and thus a value different from the intended resistance value is displayed depending on the position of the contact with the contact, and is detected due to an increase in the contact resistance. As the resistance value increases, the signal sent from the cluster to the fuel gauge changes, resulting in an error where the instructions on the fuel gauge point to a location different from the current fuel amount.

상기한 문제점을 해결하기 위해 접점과 전극이 상호 접촉하는 부위의 종래의 한 점에서 두 점으로 늘려서 접촉저항을 낮추려는 시도가 이루어지고 있으나, 이 방법도 전극 표면에서 발생하는 절연피막을 제거할 수 없어서, 연료게이지 지침불량을 근원적인 해결하지는 못하는 실정이다.In order to solve the above problems, attempts have been made to reduce the contact resistance by increasing from one point to two points in the prior art where the contact point and the electrode contact each other, but this method can also remove the insulating film generated on the electrode surface. There is no fundamental solution to the fuel gauge failure.

따라서, 상기와 같은 절연피막을 제거할 수 있는 효율적인 방법의 개발이 절실한 실정이다.Therefore, the development of an efficient method for removing the insulating film as described above is urgently needed.

이에, 본 발명의 발명자는 상기 은으로 이루어지는 전극재료의 성분을 조절하여 팔라듐 대신 구리와 세륨을 적정 비율로 첨가할 경우 황 성분에 대한 내식성이 우수한 전극을 제조할 수 있음을 알게 되어 본 발명을 완성하였다.Thus, the inventors of the present invention, by adjusting the components of the electrode material made of silver and find that the addition of copper and cerium in an appropriate ratio instead of palladium can produce an electrode excellent in corrosion resistance to sulfur components to complete the present invention It was.

따라서, 본 발명은 은을 주재료로 하는 연료 센더의 전극재료에 구리와 세륨을 첨가시켜 절연피막의 생성을 감소시키므로써 연료 게이지 지침의 오작동을 감소시킨 황 부식을 방지하는 연료 센더의 전극 재료 조성물을 제공하는 데에 그 목적이 있다.Accordingly, the present invention provides an electrode material composition of a fuel sender which prevents sulfur corrosion, which reduces the formation of an insulating film by adding copper and cerium to the electrode material of a fuel sender composed mainly of silver, thereby reducing the malfunction of the fuel gauge guidelines. The purpose is to provide.

도 1 은 차량 연료 센더 가변저항부의 구조를 나타낸 사진이다.1 is a photograph showing the structure of a vehicle fuel sender variable resistor unit.

본 발명은 연료 센더 전극 재료 조성물에 있어서, 은 60 ∼ 80 중량%를 주재료로 하고 구리 10 ∼ 20 중량%와 세륨 10 ∼ 20 중량% 를 포함하여 구성된 연료 센더 전극 재료 조성물의 제공을 특징으로 한다.The present invention is characterized by providing a fuel sender electrode material composition comprising 60 to 80% by weight of silver and 10 to 20% by weight of copper and 10 to 20% by weight of cerium in the fuel sender electrode material composition.

본 발명은 은을 주재료로 하는 연료 센더의 전극재료에 구리와 세륨을 첨가시켜 절연피막의 생성을 감소시키므로써 연료 게이지 지침의 오작동을 감소시킨 황 부식을 방지하는 연료 센더의 전극 재료 조성물에 관한 것으로서, 연료 센더의 전극과 접점간에 큰 접촉저항을 유발하는 황 화합물 피막이 전극상에 형성되지 않도록 전극재료의 성분을 조절하였다.The present invention relates to an electrode material composition of a fuel sender which prevents sulfur corrosion by reducing copper film formation by adding copper and cerium to the electrode material of a fuel sender mainly composed of silver, thereby reducing the formation of an insulating film. The composition of the electrode material was adjusted so that a sulfur compound film that caused a large contact resistance between the electrode and the contact of the fuel sender was not formed on the electrode.

즉, 기존의 전극재질에 특정원소를 첨가하여 황 성분에 대한 내 부식성을 높이고, 기계적특성 및 전기전도도를 적정한 수준으로 유지하는 것이다. 본 발명은 기본 합금 성분을 기계적 강도 및 전기전도성이 우수한 은(Ag)과 구리(Cu)의 합금으로 설계하고, 여기에 황 성분에 대한 내식성이 우수하다고 알려진 세륨(Ce)을 첨가하여 합금성분에 따른 경도, 전기전도도 및 황의 내 부식성을 향상시켰다.That is, by adding a specific element to the existing electrode material to increase the corrosion resistance to sulfur components, to maintain the mechanical properties and electrical conductivity at an appropriate level. In the present invention, the basic alloy component is designed as an alloy of silver (Ag) and copper (Cu) having excellent mechanical strength and electrical conductivity, and cerium (Ce), which is known to have excellent corrosion resistance to sulfur, is added to the alloy component. The hardness, electrical conductivity and corrosion resistance of sulfur were improved.

본 발명의 조성물에서 구리는 10 ∼ 20 중량% 사용되는데, 이때 10 중량 % 미만 사용되면 전기전도도가 좋지 못하며, 20 중량%를 초과하여 사용될 경우 황부식성에 의하여 다량의 금속이 용출되어 나오는 문제점이 있다.In the composition of the present invention, copper is used in an amount of 10 to 20% by weight, when less than 10% by weight is used, electrical conductivity is not good, and when used in excess of 20% by weight, a large amount of metal is eluted due to yellow corrosion. .

또한, 세륨은 10 ∼ 20 중량% 사용되는데, 이때 10 중량% 미만 사용되면 황에 의한 내부식성이 나빠서 다량의 금속이 용출되어 나오며, 20 중량%를 초과하여 사용될 경우 전기전도도가 저하하는 문제점이 있다.In addition, cerium is used in 10 to 20% by weight, when less than 10% by weight is used, the corrosion resistance by sulfur is poor, and a large amount of metal is eluted out, when used in excess of 20% by weight there is a problem that the electrical conductivity is lowered. .

이하 실시예에 의하여 본 발명을 더욱 구체적으로 설명하는 바, 다음 실시예에 의하여 본 발명이 제한되는 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to the following examples, which are not intended to limit the present invention.

실시예 1 ∼ 5 및 비교예 1 ∼ 9Examples 1-5 and Comparative Examples 1-9

은, 팔라듐, 구리 및 세륨 분말을 해당 조성으로 정량하여 유기바인더인 폴리비닐알콜(Poly-Vinyl-Alcohol :PVA)과 혼합한 후 세라믹 기판상에 두께 30 ∼ 50㎛로 인쇄하여 약 700 ℃, 환원분위기에서 열처리 하였다.Silver, palladium, copper and cerium powders were quantified in the corresponding composition, mixed with organic binder polyvinyl alcohol (Poly-Vinyl-Alcohol: PVA), printed on a ceramic substrate with a thickness of 30 to 50 μm, and reduced to about 700 ° C. Heat treatment in the atmosphere.

상기 조성물의 함량은 다음 표 1 에 나타내었다.The content of the composition is shown in Table 1 below.

시험예Test Example

상기 실시예와 비교예에 따라 제조된 조성물로 제조된 전극용 시편으로 물성을 측정한 다음 그 결과를 다음 표 1 에 나타내었다.The physical properties of the electrode specimens prepared from the compositions prepared according to the above Examples and Comparative Examples were measured, and the results are shown in Table 1 below.

기계적 성질은 비커스 경도(Hv)를 측정했으며, 전기전도도는 IACS(%)를 측정하였다. 황 부식에 대한 내성을 알아보기 위해서,각 시편을 묽은 황산(3%)에 5분간 침적한 후 황산용액에 용출 된 금속원소(Ag, Pd, Cu, Ce)의 총농도를 측정하였으며, 황 부식 시험 후 황산용액에 용출된 금속원소의 농도가 적을수록 내부식성이 우수하다고 판단하였다.The mechanical properties measured Vickers hardness (Hv) and the electrical conductivity measured IACS (%). In order to examine the resistance to sulfur corrosion, each specimen was immersed in dilute sulfuric acid (3%) for 5 minutes and the total concentration of the metal elements (Ag, Pd, Cu, Ce) eluted in sulfuric acid solution was measured. After the test, it was judged that the lower the concentration of the metal element eluted in the sulfuric acid solution, the better the corrosion resistance.

상기 표 1에서 보는 바와 같이 기존의 Ag-30 중량% 팔라듐(비교예 1) 합금의 경우 황 부식시험 후 용출된 금속은 대부분 은(Ag)이었으며, 팔라듐은 매우 소량 검출되었다. 이것은 팔라듐이 가지는 황에 대한 내 부식성에 기인한 것이며, 은은 첨가된 팔라듐으로 인해 황과 접촉할 수 있는 표면적이 감소하였음에도 불구하고 비교적 많은 양이 용출 되었음을 알 수 있다.As shown in Table 1, in the case of the existing Ag-30 wt% palladium (Comparative Example 1) alloy, most of the metal eluted after the sulfur corrosion test was silver (Ag), and a very small amount of palladium was detected. This is due to the corrosion resistance of palladium to sulfur, and it can be seen that silver was eluted in spite of the reduced surface area that could be contacted with sulfur due to the added palladium.

한편 은에 구리를 첨가하면 일반적으로 경도와 전기전도도가 매우 향상 되는데 반하여, 황산에 의해 용출 되는 양은 증가함을 알 수가 있다.On the other hand, when copper is added to silver, the hardness and electrical conductivity are generally improved, while the amount eluted by sulfuric acid is increased.

그러나, 세륨의 첨가량이 증가할수록 전기전도도는 감소하지만 경도 및 황에 대한 내부식성은 증가함을 알 수 있다.However, as the amount of cerium added increases, the electrical conductivity decreases, but the corrosion resistance against hardness and sulfur increases.

특히, 실시예 2 (은-15 중량% 구리-15 중량% 세륨)의 경우 기존 합금과 비교하여 경도, 전기전도도, 및 황에 대한 내 부식성이 매우 우수함을 알 수가 있다.In particular, it can be seen that in Example 2 (silver-15 wt% copper-15 wt% cerium), the hardness, the electrical conductivity, and the corrosion resistance to sulfur are very excellent compared to the existing alloy.

상기한 바와 같이 본 발명의 전극 재료의 조성물로 제조된 전극은 종래에 비하여 경도, 전기전도도 뿐만 아니라, 황에 대한 내 부식성이 매우 우수하여 연료 게이지의 지침 오작동을 감소시킬 수 있다.As described above, the electrode made of the composition of the electrode material of the present invention is excellent in hardness, electrical conductivity, as well as corrosion resistance to sulfur as compared with the prior art can reduce the guide malfunction of the fuel gauge.

Claims (1)

연료 센더 전극 재료 조성물에 있어서, 은 60 ∼ 80중량%를 주재료로 하고 구리 10 ∼ 20 중량%와 세륨 10 ∼ 20 중량% 를 포함하여 구성된 것을 특징으로 하는 연료 센더 전극 재료 조성물.A fuel sender electrode material composition comprising 60 to 80% by weight of silver as a main material and 10 to 20% by weight of copper and 10 to 20% by weight of cerium.
KR10-2002-0001671A 2002-01-11 2002-01-11 Electrode compositions of Fuel Sender for automotible KR100435335B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180092656A (en) 2017-02-10 2018-08-20 현대자동차주식회사 Electrode paste for fuel sender and manufacturing method thereof

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KR100912777B1 (en) * 2007-06-07 2009-08-18 주식회사 캐프스 An apparatus for gauging amount of fuel for vehicle

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Publication number Priority date Publication date Assignee Title
JPH0616824U (en) * 1992-07-31 1994-03-04 株式会社カンセイ Liquid level detector
JPH0640821U (en) * 1992-10-29 1994-05-31 日本精機株式会社 Liquid amount detector
JPH11337387A (en) * 1998-05-29 1999-12-10 Nippon Seiki Kk Liquid level detector
JP2000136956A (en) * 1998-10-30 2000-05-16 Nippon Seiki Co Ltd Liquid level-detecting apparatus and manufacture for conductor electrode used therein

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0616824U (en) * 1992-07-31 1994-03-04 株式会社カンセイ Liquid level detector
JPH0640821U (en) * 1992-10-29 1994-05-31 日本精機株式会社 Liquid amount detector
JPH11337387A (en) * 1998-05-29 1999-12-10 Nippon Seiki Kk Liquid level detector
JP2000136956A (en) * 1998-10-30 2000-05-16 Nippon Seiki Co Ltd Liquid level-detecting apparatus and manufacture for conductor electrode used therein

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180092656A (en) 2017-02-10 2018-08-20 현대자동차주식회사 Electrode paste for fuel sender and manufacturing method thereof

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