초록 ▼

The present invention discloses a capacitive filling-level sensor, which is suitable in particular for filling-level determination in oil separator tanks. The capacitive sensor includes a measuring probe with at least one sensor electrode. According to the invention, the measuring probe is at least

The present invention discloses a capacitive filling-level sensor, which is suitable in particular for filling-level determination in oil separator tanks. The capacitive sensor includes a measuring probe with at least one sensor electrode. According to the invention, the measuring probe is at least partially sheathed with at least one outer layer of a fluorinated plastic and at least one inner layer of a mica-filled plastic. Important exemplary embodiments concern an outer layer of perfluoroethylene-perfluoropropylene copolymer (FEP), an inner layer of mica-coated glass fiber tape impregnated with epoxy resin and possibly silanized and an incompressible, thermally adapted filling of the measuring-probe pipe with silicone oil and glass spheres or glass polyhedrons and/or an inner rod of AlMgSi-filled epoxy resin. The sheathing is electrically insulating, chemically inert, hydrophobic, oleophobic, waterproof, mechanically robust and easy to produce.

대표청구항 ▼

1. A capacitive filling-level sensor, useful for determining a location of a boundary layer between water and oil in a separator tank, comprising:a measuring probe with an electrode, the measuring probe being provided at least partially with an electrically insulating covering, wherein the covering

1. A capacitive filling-level sensor, useful for determining a location of a boundary layer between water and oil in a separator tank, comprising:a measuring probe with an electrode, the measuring probe being provided at least partially with an electrically insulating covering, wherein the covering comprises at least one outer layer of a fluorinated plastic and at least one inner layer of a mica-containing plastic.