Housing for gas sensors

US5546787A · kind A · utility

Assignee

• Roth-Technik GmbH & Co. · DE

Inventors

• Edelbert Hafele · Karlsruhe, DE
• Walter Seeger · Gaggenau, DE

Key dates

• Filing date: Apr 22, 1994
• Grant date: Aug 20, 1996
• Expiry date: Apr 22, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/4062
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A housing (5) gas sensors, preferably lambda probes for detecting the content of pollution or oxygen or both in exhaust from, preferably, internal-combustion engines. A protective outer housing has electric connections at one end for a sensor mounted on a metal. A perforated protective cap accommodates the sensor and is intended for exposure to the gas being analyzed at the other end. A ceramic shape accommodates the connections and/or the metal and is accommodated in turn in the outer housing. The ceramic shape consists of at least two halves with a slot that is open along one side at the first end and with contacts resting flat against the base and walls of the slot with one side elevated above the open side. Each half also accommodates a depression extending all the way to the other end with the metal fitting into the depressions. At least the projecting areas of the contacts are in the vicinity of the depression. The connections are on the back of the contacts.