초록 ▼

A device for detecting an interface between two fluids of differing electrical properties, said device having an electrical circuit comprising transmitting means for transmitting electrical impulses to said fluids, a detector of electrical impulses, and at least one probe which is adapted to extend

A device for detecting an interface between two fluids of differing electrical properties, said device having an electrical circuit comprising transmitting means for transmitting electrical impulses to said fluids, a detector of electrical impulses, and at least one probe which is adapted to extend into said fluids; said probe comprising an electrically conductive probe member and a grounded electrically conductive shield, the probe member being mounted within the shield and being spaced from the latter by an air core, the probe member adjacent its distal end portion, being sealed to the shield by a dielectric seal which prevents the ingress of said fluid into the space between the shield and the probe member.

대표청구항 ▼

A device for detecting an interface between oil and water, which are two fluids of differing impedance, said device having an electrical circuit comprising transmitting means, a detector and at least one probe; said transmitting means being arranged to transmit electrical impulses to one of said two

A device for detecting an interface between oil and water, which are two fluids of differing impedance, said device having an electrical circuit comprising transmitting means, a detector and at least one probe; said transmitting means being arranged to transmit electrical impulses to one of said two fluids by way of a probe so that the passage of these impulses through said fluid will be affected by the impedance of the latter; the detector being arranged to receive said impulses from the probe so as to detect a change in said impedance which occurs at said interface; and each said probe being adapted to extend into said fluid and comprising an electrically conductive probe member and a grounded electrically conductive shield, the probe member being mounted within the shield and being spaced from the latter by an air core, the probe member, adjacent its distal end portion being sealed to the shield by a dielectric seal which prevents the ingress of said fluid into the space between the shield and the probe member, the shield having an outwardly extending portion which extends outwardly of the probe member and of said seal.