Probe for monitoring liquid

US5272921A · kind A · utility

Assignee

• GESTRA AG · DE

Inventors

• Werner Foller · Stuhr, DE
• Helmut Willenbrock · Achim, DE
• Wolfgang Behnken · Delmenhorst, DE

Key dates

• Filing date: Mar 5, 1993
• Grant date: Dec 28, 1993
• Expiry date: Mar 5, 2013

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F23/268
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A probe for monitoring a liquid level has a one-piece insulation sheath extended within the probe casing and positioned far beyond the end of a contact pressure spring that is removed from the liquid. This contact pressure spring has an associated spring abutment formed by either a sleeve or a cap surrounding the insulation sheath. In the probe casing, lengthy sections of insulation are present such that functional interferences are avoided. The probe casing has large-dimensioned ventilation apertures for preventing moisture films.