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1. (WO2018053655) RESISTIVE METAL OXIDE GAS SENSOR COATED WITH A FLUOROPOLYMER FILTER

Pub. No.:    WO/2018/053655    International Application No.:    PCT/CH2016/000122
Publication Date: Fri Mar 30 01:59:59 CEST 2018 International Filing Date: Thu Sep 22 01:59:59 CEST 2016
IPC: G01N 27/12
Applicants: SENSIRION AG
Inventors: ANDERSSON, Pernilla
ROTZETTER, Aline
Title: RESISTIVE METAL OXIDE GAS SENSOR COATED WITH A FLUOROPOLYMER FILTER
Abstract:
The present invention is notably directed to a resistive metal oxide gas sensor. The sensor notably comprises a support structure and a patch of sensing material arranged on the support structure or partly housed therein. The patch comprises a metal oxide material. Electrodes are in electrical communication with the patch. The sensor further comprises a heater, in thermal communication with the patch, and a selective gas-permeable filter. The selective gas-permeable filter comprises a fluoropolymer. A first part of an external surface of the patch covers a part of the support structure, while a remaining part of said external surface is coated by the selective gas-permeable filter, so as to form a coated patch of sensing material. The present invention is further directed to related devices and methods of operation.