Device for taking a sample of gas

A device for taking a sample of gas, the device comprising:

• a base supporting a fluid circuit comprising a first, upstream end provided with an inlet connector configured to be connected removably to an outlet connector of a source of gas to be sampled,
• the fluid circuit comprising:
• a sampling tank and a first pipe connecting the inlet connector to an inlet of the sampling tank,
• the first pipe comprising a set of a plurality of valves, disposed in series, for controlling the circulation of the gas,
• an evacuation line which is provided with a control valve and comprises a first, upstream end connected to the first pipe and a second, downstream end that opens into a discharge zone such as the atmosphere,
• a second pipe having an upstream end connected to an outlet of the sampling tank and a downstream end connected to the evacuation line via the control valve, and
• an analysis line comprising an upstream end connected to the first pipe and a downstream end provided with an analysis outlet configured to be connected to an analysis apparatus,
• the analysis line comprising at least one control valve,
• wherein at least some of the control valves of the circuit are disposed in respective housings that each comprise a fluid inlet and a fluid outlet that are connected to said control valve, and,
• wherein the outlet of one housing is connected directly to the inlet of the adjacent housing.

A method for taking a sample of gas, the method using a device for taking a sample of gas, comprising:

• a base supporting a fluid circuit comprising a first, upstream end provided with an inlet connector configured to be connected removably to an outlet connector of a source of gas to be sampled,
• the fluid circuit comprising:
• a sampling tank and a first pipe connecting the inlet connector to an inlet of the sampling tank,
• the first pipe comprising a set of a plurality of valves for controlling the circulation of the gas, which are disposed in series, the circuit comprising an evacuation line which is provided with a control valve and comprises a first, upstream end connected to the first pipe and a second, downstream end that opens into a discharge zone such as the atmosphere,
• a second pipe having an upstream end connected to an outlet of the sampling tank and a downstream end connected to the evacuation line via the control valve,
• an analysis line comprising an upstream end connected to the first pipe and a downstream end provided with an analysis outlet connected to an analysis apparatus,
• the analysis line comprising at least one control valve (16),
• wherein the method comprises:
• a step of carrying out leak tests, during which the circuit is pressurized and the pressure is measured,
• a step comprising a plurality of compression/expansion cycles of the lines of the circuit,
• a step of measuring the humidity of the gas to be sampled and,
• a step of sampling gas to be analysed in the tank.