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    • 3. 发明授权
    • Capacitive probe for measuring the level of an electricity-conducting liquid in a vessel
    • 用于测量容器中导电液体水平的电容探针
    • US06563328B1
    • 2003-05-13
    • US09608152
    • 2000-06-30
    • Roland LenormandChristophe Chaput
    • Roland LenormandChristophe Chaput
    • G01R2726
    • G01F23/268
    • Capacitive probe measuring the level, in a vessel and with high precision, of the interface between a conducting fluid (F1) and a non-conducting fluid (a gas or oil for example), suited to work under high pressure and high temperature conditions. The probe comprises a preferably tubular insulating layer (3) made of a dielectric heat-resisting material (a metal oxide such as zirconia or alumina) baked at a high temperature, with a first face in contact with conducting fluid (F1) and an opposite face in contact with a second electrode, consisting for example of a coating or of a layer made of a fusible alloy deposited on the opposite face of insulant (3), selected according to the temperature range within which the capacitive probe is intended to work, or possibly of an added tube. Alloys based on zinc, tin, copper, etc, can for example be used. A second capacitor of the same type used for temperature compensation of the first one can be placed within the tubular insulating layer. Its capacitance is for example of the order of 1 nF. The probe can be applied in laboratory apparatuses working under high pressure and high temperature conditions, notably in petrophysical test cells.
    • 电容式探头在容器中高精度地测量导电流体(F1)和非导电流体(例如气体或油)之间的界面,适用于在高压和高温条件下工作。 探针包括由绝缘耐热材料(诸如氧化锆或氧化铝的金属氧化物)制成的优选管状绝缘层(3),其在高温下烘烤,第一面与导电流体(F1)接触, 与第二电极接触,该第二电极由例如涂层或沉积在绝缘体(3)的相对表面上的可熔合金制成的层组成,其根据电容式探头旨在工作的温度范围选择, 或可能加入管。 可以使用例如基于锌,锡,铜等的合金。 用于第一种温度补偿的相同类型的第二电容器可以放置在管状绝缘层内。 其电容值例如为1 nF。 该探针可以应用于在高压和高温条件下工作的实验室设备,特别是在岩石物理测试电池中。