Gas leak detector for detection of a leak of liquefied petroleum gas (LPG) from - a first type of leak of gas from a gas container valve unit of a LPG gas container and/or - a second type of leak of gas between the gas container valve unit and the gas container and/or - a third type of leak of gas through a wall or a joint in the gas container , wherein the gas-leak detector comprises - a housing which can be moved to at least partly surround the gas container , the housing comprises means for providing a closed connection between the housing and an external surface to form a closed space , or a substantially closed space , so that the first and/or the second and/or the third type of leak of gas from the gas container and/or gas container valve unit leaks into the closed space , - detection means for detecting the first and/or the second and/or the third type of leak of gas, - an airflow generator for moving a mixture of air and any leak of gas to the detection means , wherein when the housing is in a closed connection with the external surface , then the closed space , the detection means and the airflow generator are part of a gas tight closed loop, or a substantially gas tight closed loop, so that the airflow generator circulates at least a fraction of the volume of the mixture of air and the leak of gas in the gas tight closed loop, wherein the gas tight closed loop comprises a circuit connected to the housing to enable the circulation of the mixture of air and the leak of gas via a fluidic passageway of the circuit, and wherein the housing further comprises a top part , a bottom part and a side part , and the side part is connecting the top part and the bottom part , wherein the bottom part of the housing is movable relatively to the top part of the housing . - a first type of leak of gas from a gas container valve unit of a LPG gas container and/or - a second type of leak of gas between the gas container valve unit and the gas container and/or - a third type of leak of gas through a wall or a joint in the gas container , - a housing which can be moved to at least partly surround the gas container , the housing comprises means for providing a closed connection between the housing and an external surface to form a closed space , or a substantially closed space , so that the first and/or the second and/or the third type of leak of gas from the gas container and/or gas container valve unit leaks into the closed space , - detection means for detecting the first and/or the second and/or the third type of leak of gas, - an airflow generator for moving a mixture of air and any leak of gas to the detection means , wherein when the housing is in a closed connection with the external surface , then the closed space , the detection means and the airflow generator are part of a gas tight closed loop, or a substantially gas tight closed loop, so that the airflow generator circulates at least a fraction of the volume of the mixture of air and the leak of gas in the gas tight closed loop, wherein the gas tight closed loop comprises a circuit connected to the housing to enable the circulation of the mixture of air and the leak of gas via a fluidic passageway of the circuit, and wherein the housing further comprises a top part , a bottom part and a side part , and the side part is connecting the top part and the bottom part , wherein the bottom part of the housing is movable relatively to the top part of the housing . <EOS>