초록 ▼

For sensing gaseous hydrocarbons in a gas mixture, a device consisting of two sensitive elements, one being a reference element, which are heated to different temperatures. The sensors, formed by subjecting films deposited by silk-screen processes to heat treatment at high temperature, are connected

For sensing gaseous hydrocarbons in a gas mixture, a device consisting of two sensitive elements, one being a reference element, which are heated to different temperatures. The sensors, formed by subjecting films deposited by silk-screen processes to heat treatment at high temperature, are connected to an electronic evaluation circuit.

대표청구항 ▼

A device having a substrate, wherein the device is for sensing hydrocarbons, comprising: a) a reference element positioned on the substrate for emitting a reference signal, wherein said reference element comprises a thin film of a metallorganic compound of tin oxide and platinum; b) a measuring elem

A device having a substrate, wherein the device is for sensing hydrocarbons, comprising: a) a reference element positioned on the substrate for emitting a reference signal, wherein said reference element comprises a thin film of a metallorganic compound of tin oxide and platinum; b) a measuring element positioned on the substrate for sensing hydrocarbons and for emitting a measured signal representing said sensed hydrocarbons, wherein said measuring element comprises a thin film of a metallorganic compound of tin oxide and platinum; c) an electronic circuit connected to said reference element and said measuring element for comparing said reference signal with said measured signal and for emitting an evaluation signal representing said comparison; and d) an alarm connected to said evaluation signal, wherein said alarm is activated when said comparison reaches said reference signal; wherein each of said films comprise at least one layer and wherein each of said layers is about 0.2 microns thick.