Gas detection system

A gas detection system, including:

• a plurality of sampling assemblies, respectively including at least one inlet channel, a first pump and a first valve, the first pump being communicated between the at least one inlet channel and the first valve, the first valve being switchable between a sampling state and a pre-sampling state;
• at least one detector, selectively communicated with the first valve of one of the plurality of sampling assemblies;
• and
• a control unit, communicative with the plurality of sampling assemblies and controlling said first valves of the plurality of sampling assemblies;
• wherein when the first valve of one of the plurality of sampling assemblies is in the sampling state, the first valve of another one of the plurality of sampling assemblies is in the pre-sampling state;
• the first valve in the sampling state is communicated with the at least one detector, and the first valve in the pre-sampling state is non-communicated with the at least one detector and communicated with an external environment.