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1. (WO2015126306) PRINTED GAS SENSOR AND DIGITAL EXPIRY DATE THEREOF

Pub. No.:    WO/2015/126306    International Application No.:    PCT/SE2015/000010
Publication Date: Fri Aug 28 01:59:59 CEST 2015 International Filing Date: Wed Feb 25 00:59:59 CET 2015
IPC: G01N 31/22
G01K 3/04
G01N 33/02
G06Q 10/08
G09G 5/00
Applicants: INNOSCENTIA AB
Inventors: OLSSON, Martin, Andreas
Title: PRINTED GAS SENSOR AND DIGITAL EXPIRY DATE THEREOF
Abstract:
The invention discloses a printed gas sensor comprising a metalloporphyrin dye, having a first and second mode, and a nanoporous carrier material comprising a plurality of particles with a size less than 5μιτι, said plurality of particles having a plurality of pores with a pore size in the range 5-50nm, wherein said metalloporphyrin dye is bound to said nanoporous carrier material. The invention further discloses a method of preparing a gas sensing composition for detection of food status as well as a digital expiry date device system. The digital expiry date device system comprises a packaging material having an inner surface and an outer surface; a first transponder disposed on said inner surface and a second transponder disposed on said outer surface; a sensor portion electrically connected to said first transponder for detecting food status and communicate said status to said second transponder, wherein said sensor portion comprises a metalloporphyrin dye to configure said sensor portion for an impedance change upon binding of a gaseous analyte to said metalloporphyrin dye; and a printed numerical array.