Inertia-gravity filter for cleaning gas intended for analysis from the dispersed phase, comprising - a vertically arranged flow-type precipitation chamber having an upper and a lower end portion (5, 7) - an inlet pipe communicating with the lower end portion of the precipitation chamber, - an outlet pipe for the blow-through gas coaxially communicating with the inlet pipe, wherein the precipitation chamber is arranged vertically with respect to the coaxially arranged inlet pipe and the outlet pipe, - a discharge channel for the gas to be analyzed, wherein the side walls of the precipitation chamber and the discharge channel for the gas to be analyzed have a constant sectional profile, - an outlet pipe for the gas to be analyzed, communicating with the outlet opening of the discharge channel of the gas to be analyzed, - wherein the filter is adapted to establish the correlations of the intensities of the blow-through flow of the outlet pipe for the blow-through gas to the blow-through flow of the outlet pipe for the gas to be analyzed in a range between 10 to 1 and 50 to 1, characterized in that - the discharge channel for the gas to be analysed communicates by its inlet opening with the upper portion of the space of the precipitation chamber, - the discharge channel for the gas to be analyzed is arranged vertically in the precipitation chamber, wherein the outlet opening of the discharge channel for the gas to be analyzed is arranged in the lower end portion of the precipitation chamber, - the upper end portion of the precipitation chamber is closed, - the inner diameter of the inlet pipe and the outlet pipe for the blow-through gas is formed with the same diameter, which is smaller than or equal to the inner diameter of the flow-type precipitation chamber, - allowing thereby to operate in a continuous mode and to avoid the use of membrane, charcoal or other porous filters. - a vertically arranged flow-type precipitation chamber having an upper and a lower end portion (5, 7) - an inlet pipe communicating with the lower end portion of the precipitation chamber, - an outlet pipe for the blow-through gas coaxially communicating with the inlet pipe, wherein the precipitation chamber is arranged vertically with respect to the coaxially arranged inlet pipe and the outlet pipe, - a discharge channel for the gas to be analyzed, wherein the side walls of the precipitation chamber and the discharge channel for the gas to be analyzed have a constant sectional profile, - an outlet pipe for the gas to be analyzed, communicating with the outlet opening of the discharge channel of the gas to be analyzed, - wherein the filter is adapted to establish the correlations of the intensities of the blow-through flow of the outlet pipe for the blow-through gas to the blow-through flow of the outlet pipe for the gas to be analyzed in a range between 10 to 1 and 50 to 1, - the discharge channel for the gas to be analysed communicates by its inlet opening with the upper portion of the space of the precipitation chamber, - the discharge channel for the gas to be analyzed is arranged vertically in the precipitation chamber, wherein the outlet opening of the discharge channel for the gas to be analyzed is arranged in the lower end portion of the precipitation chamber, - the upper end portion of the precipitation chamber is closed, - the inner diameter of the inlet pipe and the outlet pipe for the blow-through gas is formed with the same diameter, which is smaller than or equal to the inner diameter of the flow-type precipitation chamber, - the upper end portion of the precipitation chamber is closed, - the inner diameter of the inlet pipe and the outlet pipe for the blow-through gas is formed with the same diameter, which is smaller than or equal to the inner diameter of the flow-type precipitation chamber, - allowing thereby to operate in a continuous mode and to avoid the use of membrane, charcoal or other porous filters.