ALKALI VAPOUR SIGNALLING DEVICE Russian patent published in 2013 - IPC G01N27/00 

FIELD: chemistry.

SUBSTANCE: alkali vapour signalling device (analyser), which uses a pH metric, having a housing, a reaction vessel filled with the analysed solution, an electrode platform-holder; a measuring and a temperature electrode placed in the analysed solution; devices for controlling, processing and displaying measurement result information; an electrical connection of the output of the measuring electrode, thermoelectrode with the device for controlling, processing information and displaying the measurement result; there is a special device for controlling, processing and displaying information on concentration of alkali vapour; there is a device for sampling alkali vapour sucked from the space over the production bath through a hose, a second normally open valve, a compressor, an ejector; there is a pump, a T-branch, a first normally closed valve, an additional vessel with clean deionised water, pipes; the analysed alkali vapour is periodically passed through the solution of deionised water in the reaction vessel; a combined measuring electrode measures pH of the solution; the deionised water is replaced with clean deionised water for each next cycle of measuring concentration of alkali vapour.

EFFECT: invention enables signallisation of content and amount of alkali vapour in the atmosphere of etching assemblies of a processing line for processing metal in hot baths.

9 cl, 1 dwg