Optical co2 and combined 02/co2 sensors

Details Optical co2 and combined 02/co2 sensors Optical co2 and combined 02/co2 sensors

G - Physics

01

N

G01N 21/64 (2006.01) G01N 21/77 (2006.01)

Patent

CA 2517071

Improved carbon dioxide sensors are disclosed which are less sensitive to the moisture content of the environment and which are substantially insensitive to oxygen levels under normal working conditions. The CO2 sensor comprises a pH indicator and long-lived reference luminophore and a porous sol-gel matrix. Combined CO2 and O2 sensors are also described. Further disclosed are methods of printing sensor onto substrates.

L'invention concerne des capteurs améliorés de dioxyde de carbone qui sont moins sensibles au taux d'humidité de l'environnement et qui sont notablement insensibles aux taux d'oxygène dans des conditions de travail normales. Le capteur de CO¿2? comprend un indicateur de pH, une substance luminescente de référence à période longue et une matrice sol-gel poreuse. L'invention concerne également des capteurs de CO¿2? et de O¿2? combiné. L'invention concerne également des méthodes permettant d'imprimer un capteur sur des substrats.

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