Importance

Loading Importance Indicators...

Abstract

Process for the continuous analysis of the composition of gases, by means of a measuring head for determining the flow rate and analysis equipment which is placed a distance away from the measuring head and is connected thereto by a sample line, a calibration gas being fed to the sample line at the measuring head, by means of which the transit time of the gases is determined, and by means of this transit time a phase shift is introduced during the determination of the connection between the flow rate and the composition. According to the invention a series of calibration gas impulses are fed from the equipment, and the average transit time of the gases in the conditions prevailing locally at that moment is determined therewith, for the essentially continuous determination of the connection between the flow rate and the composition. Device for carrying out the process comprising a measuring head and analysis equipment for determining the composition of the gases, provided with a source of calibration gas in the analysis equipment, a calibration gas line connected to the sample line a short distance from the suction aperture thereof with the measuring head, means for maintaining the calibration gas under pressure, and means for periodically opening a valve in the calibration gas line, and means for determining the transit time of the calibration gas impulses through the sample line.

Loading the Abstract Image...

First Claim