ELECTROCHEMICAL GAS ANALYSER Russian patent published in 2015 - IPC G01N27/28 G01N27/48 

FIELD: instrumentation.

SUBSTANCE: gas analyser (fig. 1) comprises electrolytic chamber 1 with capillary 2 extending to gas analyser cathode surface. Said chamber and capillary are filled with electrolyte. Device comprises anode 3 in direct contact with chamber electrolyte and cathode 4 arranged at gas analyser surface nearby capillary outlet area. Cathode and capillary are isolated from ambient medium by selective-permeability ring-shape membrane 5 attracted to cathode and capillary and locked at gas analyser cathode surface. Said membrane is attracted and locked by cover 6 composed of turned over cup with axial bore in its bottom and coupled with coupling nut 7. Said membrane is attracted by its edges squeezed between cover bottom and seal ring 8 arranged inside said cover and features preset modulus of elasticity and depth. Membrane locking is ensured by said cover over closed line with the help of rib shaped to blunt angle. Conductors 9, 10 are designed to derive output signal from anode 3 and cathode 4. Said conductors are connected to gas analyser output signal recorder 11. The second version (fig. 2) differs from said first one in that membrane is attracted and locked by different elements. Electrolytic chamber 1 with capillary 2, anode 3 and cathode 4, selective-permeability ring-shape membrane 5 attracted to cathode and capillary and locked at gas analyser cathode surface by the rib in closed line. Note here that at joint between membrane and cover, the latter features low friction factor. Device comprises coupling nut 7. Attracting element 8 is arranged inside turned cover 6 and composed of over cup with axial bore in its bottom. Cover 6 and attracting element 8 are articulated. Coupling nut 7 is connected with attracting element 8. Said seal ring 9 is inside element 8 and features preset modulus of elasticity and depth Membrane 5 is attracted to cathode and capillary by element 8 with the help of nut 7 so that membrane edges are squeezed between attracting element bottom and seal ring 9. Conductors 10, 11 tap output signal from said anode and cathode and are connected to output signal recorder 12. The third version (fig. 3) differs from said first one in that membrane is attracted and locked by different elements. It differs from above versions in the following. Electrolytic chamber 1 with capillary 2, anode 3 and cathode 4, selective-permeability ring-shape membrane 5 attracted to cathode and capillary and locked at gas analyser cathode surface by the rib in closed line. Device includes coupling nut 7 arranged inside cover 6 and rigidly coupled therewith. Attracting element 8 composed by washer is arranged inside coupling nut 7, at its bottom, while seal ring 9 with preset modulus of elasticity and depth is arranged therein. Note here that at joint between element 8 and nut 7 features to friction factor. Said membrane is attracted to element 8 so that its edges are squeezed between element 8 and ring 9. Conductors 10, 11 tap output signal from said anode and cathode and are connected to output signal recorder 12.

EFFECT: simplified and reliable design, efficient sealing, lower membrane material input.

5 cl, 3 dwg