DEVICE FOR PREPARATION OF CALIBRATION VAPOR-AND- GAS MIXTURE OF SUBSTANCES Russian patent published in 2002 - IPC

FIELD: graduation of gas analyzers. SUBSTANCE: device has vessel for saturation of gas with vapor of substance and unit for mixing gas with vapor made in form of T-piece. One passage of this T-piece is communicated with atmosphere through adjustable pneumatic resistor and other passage is introduced through hole found in cover into upper portion of vessel interior and third passage of T-piece is connected with gas line for discharge of vapor-and-gas mixture. Vessel for saturation of gas with vapor of substance is made in form of Dewar flask. Cover is made from elastic heat-insulating material with circular projections over edge of cover which embrace upper edges of Dewar flask. EFFECT: possibility of ensuring constant level of concentration of vapor in gas at varying ambient temperature without special-purpose temperature control units. 4 cl, 1 dwg