An access control device for controlling the access to a tank, - said tank defining a storage chamber and an access to said storage chamber, and - said device comprising at least one cap of said tank defining a longitudinal axis and comprising: - a closure body rotatable about said longitudinal axis defining a closed position for said cap in which it is connected to said access, thereby closing said tank, and an open position in which it is released from said access, thereby opening said tank; - a housing defining a housing volume for said closure body; - said closure body and said housing defining a reciprocal rotation around said longitudinal axis; - a connection suitable to connect said closure body to said housing, thereby defining an operating configuration in which said reciprocal rotation between said closure body and said housing is prevented, allowing said housing to command the passage of said closure body between said closed and open positions, and a non-operating configuration in which it allows said reciprocal rotation between said closure body and said housing, thereby preventing said housing from commanding the passage of said closure body between said closed and open positions; characterised in that the access control device comprises further - data connection means suitable to realize a wireless data connection; and in that it is associable to - an external apparatus suitable to realize said data connection with said data connection means so as to command the passage of said connection between said operating configuration and said non-operating configuration. - said tank defining a storage chamber and an access to said storage chamber, and - said device comprising at least one cap of said tank defining a longitudinal axis and comprising: - a closure body rotatable about said longitudinal axis defining a closed position for said cap in which it is connected to said access, thereby closing said tank, and an open position in which it is released from said access, thereby opening said tank; - a housing defining a housing volume for said closure body; - said closure body and said housing defining a reciprocal rotation around said longitudinal axis; - a connection suitable to connect said closure body to said housing, thereby defining an operating configuration in which said reciprocal rotation between said closure body and said housing is prevented, allowing said housing to command the passage of said closure body between said closed and open positions, and a non-operating configuration in which it allows said reciprocal rotation between said closure body and said housing, thereby preventing said housing from commanding the passage of said closure body between said closed and open positions; - a closure body rotatable about said longitudinal axis defining a closed position for said cap in which it is connected to said access, thereby closing said tank, and an open position in which it is released from said access, thereby opening said tank; - a housing defining a housing volume for said closure body; - said closure body and said housing defining a reciprocal rotation around said longitudinal axis; - a connection suitable to connect said closure body to said housing, thereby defining an operating configuration in which said reciprocal rotation between said closure body and said housing is prevented, allowing said housing to command the passage of said closure body between said closed and open positions, and a non-operating configuration in which it allows said reciprocal rotation between said closure body and said housing, thereby preventing said housing from commanding the passage of said closure body between said closed and open positions; - data connection means suitable to realize a wireless data connection; and in that it is associable to - an external apparatus suitable to realize said data connection with said data connection means so as to command the passage of said connection between said operating configuration and said non-operating configuration.