Patent ID: 7918122

Claim:
A stocker for storing a plurality of storage containers, each of the storage containers including a first housing defining a first space for storing a substrate, and an opening in the first housing through which a gas flows into the first space, the stocker comprising: plural shelves on which the storage containers are placed; plural purge units arranged in a longitudinal direction of the stocker and on a part of the plural shelves, each of the plural purge units including a purge table adapted to receive one of the storage containers and a gas inlet communicating with the opening and through which the gas flows to the first space when the storage container is on the purge table; a measurement container that includes a second housing defining a second space, a gas passage in the second housing communicating with the gas inlet and through which the gas flows into the second space when the measurement container is on the purge table, and a flow amount measurement unit in the second space that measures an amount of the gas flowing from the gas inlet through the gas passage; and a transport unit that transports the storage container to the purge table and that transports the measurement container among plural ones of the purge table, wherein a portion of the first housing received on the purge table is substantially a same size as that of the second housing, and wherein an exterior of the first housing has substantially a same shape and size as an exterior of the second housing.