초록 ▼

The level of the interfacial boundary between two liquids having different dielectric constants is located by means of a detector in which two parallel sectional members constitute external capacitor plates supported by a metallic base plate and in which small metallic plates encased within an elect

The level of the interfacial boundary between two liquids having different dielectric constants is located by means of a detector in which two parallel sectional members constitute external capacitor plates supported by a metallic base plate and in which small metallic plates encased within an electrically insulated central upright member constitute central capacitor plates. The assembly thus forms a plurality of capacitors, the plates of which are immersed in at least one of the liquids. Each capacitor forms part of an oscillating circuit connected to electronic means for effecting a comparison between the oscillation frequency and a reference frequency.

대표청구항 ▼

A detector for locating the interfacial boundary level between two liquids having different dielectric constants, of the type comprising a plurality of capacitors formed by two parallel external capacitor plates supported by a metallic base plate and central capacitor plate elements electrically ins

A detector for locating the interfacial boundary level between two liquids having different dielectric constants, of the type comprising a plurality of capacitors formed by two parallel external capacitor plates supported by a metallic base plate and central capacitor plate elements electrically insulated from said base plate, said capacitor plate elements being immersed in at least one of the liquids, each capacitor plate element being adapted to form part of an oscillating circuit connected to electronic means for effecting a comparison between the oscillation frequency of said circuit and a reference frequency, wherein the external capacitor plate elements are constituted by two parallel sectional members and the central capacitor plate elements are constituted by small metallic plates encased within a central insulating upright member placed between the two sectional members, said central upright member forming an insulating core provided with compartments for accommodating the small metallic plates, said core being covered by two insulating side cheeks with are welded thereto.