GAS ANALYSER MEASUREMENT SYSTEM FOR OXYGEN IN GASEOUS MIXTURE Russian patent published in 2012 - IPC G01N27/72 

FIELD: chemistry.

SUBSTANCE: gas analyser measurement system has one pair of magnetic and one pair of false poles. The false poles are tips made from nonmagnetic material, having a shape similar to magnetic tips in the working space. Near the magnetic and false poles there is a working and a comparative sensitive element. According to the invention, the magnetic and false poles lie horizontally. Each sensitive element is a micro-spiral made from cast micro-wire with conductor diameter of 10-12 mcm in a high-thermal insulation, where the spiral is wound such that the insulation of the windings is fused. The sensitive element is mounted on the base of the chamber opposite the gap between the tips of magnetic poles such that its spiral lies inside the gap on the axial line at a distance of 0.3-0.5 mm from the inner edge of the tips of magnetic poles, and the comparative sensitive element is placed symmetrical to the working sensitive element such that its spiral lies in the gap of the tips of the false poles on the axial line at distance of 0.3-0.5 mm from their outer edge. The tips of the magnetic and false poles lie symmetrically. The tips of the poles lie on the outer sides of the chamber of the measurement system.

EFFECT: reduced weight and size, reduced loss of energy and providing a linear relationship between the output signal and concentration of oxygen in the gaseous mixture.

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