Capacitive sensor for detecting surface condensation

US6614241B2 · kind B2 · utility

Assignee

• Preh-Werke GmbH & Co. KG · DE

Inventors

• Hans-Michael Schmitt · Münnerstadt, DE
• Gottfried Berthold · Reutlingen, DE
• Juergen Bach · Bad Neustadt an der Saale, DE

Key dates

• Filing date: Mar 28, 2001
• Grant date: Sep 2, 2003
• Expiry date: Jun 6, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/223
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A capacitive sensor for detecting surface condensation which includes a carrier (2), a metal layer (3) applied to the carrier (2) to form an interdigital structure, a passivation layer (6) formed over the metal layer (3), and a hydrophilic layer (7) applied over the passivation layer (6), where the hydrophilic layer (7) increases a surface tension of the passivation layer (7).