DEVICE AND METHOD FOR DIFFERENTIATING A GAS IN A SAMPLE

摘要

A device is provided for testing a sample via a gas stream, including: an opening; structure for generating a device gas stream along at least one flow path passing through the opening; at least one pressure sensor, each pressure sensor being arranged to measure a pressure of the gas stream along at least one flow path; and a mass flowmeter arranged to measure a parameter representative of the mass flow of the gas stream along the flow path. The device is arranged to quantify the presence of a gas of interest within a gas being analyzed and/or to determine the size of a leak hole from a measurement of the parameter representative of the mass flow. A method is also provided that is implemented by such a device. The method can be used to test the integrity of food packaging, and for detecting leaks or problems related to sealing containers.

主权项

1. A device for testing a sample via a gas stream, comprising:
an opening; means for generating a gas stream in the device along at least one flow path passing through the opening; at least one pressure sensor, each pressure sensor being arranged in order to measure a pressure of the gas stream along at least one flow path; a mass flowmeter, arranged in order to measure a parameter representing the mass flow rate of the gas stream along each flow path; the at least one flow path comprises a suction path starting at the opening; the means for generating the gas stream are arranged in order to suck in a gas to be analyzed so that this gas to be analyzed flows along the suction path, within the device, said suction path narrows locally at a measurement hole; the at least one pressure sensor comprises a suction pressure sensor arranged in order to measure a pressure of the gas to be analyzed along the suction path; the mass flowmeter is arranged in order to measure a parameter representing the mass flow rate of the gas to be analyzed along the suction path; and the device also comprises calculation means arranged in order to quantify the presence of a gas of interest within the gas to be analyzed, based on a measurement of the parameter representing the mass flow rate of the gas to be analyzed along the suction path; and the calculation means are arranged in order to quantify the presence of the gas of interest in the form of a calculation of a proportion or of a volume of the gas of interest which depends on the diameter of the measurement hole.