Abstract: The invention relates to a measuring system for determining a dispensed amount of hydrogen of a hydrogen dispensing location from a hydrogen dispensing unit present there to a receiving tank including a measuring unit. The measuring unit can have a flowmeter, wherein the measuring system is designed to establish a fluid-tight connection between the hydrogen dispensing unit and the receiving tank. Furthermore, the flowmeter has an active cooling. The invention further relates to a measuring method for determining a dispensed amount of hydrogen.

Abstract: A gear flow meter for measuring the flow of fluid has a gear chamber in which at least one measuring gear wheel is arranged, a bottom and a cover. A respective rotation shaft is provided centrally relative to each measuring gear wheel. Each measuring gear wheel is rotatably mounted and has a measuring unit to detect a gear rotation, and an evaluation means to determine a flow of the fluid through the gear chamber. A respective receiving area is provided between each measuring gear wheel and the bottom, and also between each measuring gear wheel and the cover, in which receiving area rolling elements are arranged. The rolling elements directly contact the respective measuring gear wheel, the respective rotation shaft and the bottom or cover. The rolling elements are movable as a whole relative to the rotation shaft, the measuring gear wheel and the bottom or cover which they contact.

Abstract: The invention relates to a spindle flow meter with a housing which has two recesses. In the recesses two multi-turn screw spindles are arranged which are provided to be rotatable in the housing. It is provided according to the invention that the pitch circle diameters of the two screw spindles are of equal size.

Abstract: The invention relates to a spindle flow meter with a housing which has two recesses. In the recesses two multi-turn screw spindles are arranged which are provided to be rotatable in the housing. It is provided according to the invention that the pitch circle diameters of the two screw spindles are of equal size.

Abstract: The invention relates to a gear flow meter for measuring the flow of a fluid, having a gear chamber, in which at least one measuring gear wheel is arranged, having a bottom and a cover which delimit the gear chamber on end faces of the at least one measuring gear wheel, wherein a respective rotation shaft is provided centrally relative to each measuring gear wheel, wherein each measuring gear wheel is rotatably mounted and a fluid is conveyable through the gear chamber to rotate the at least one measuring gear wheel, having a measuring unit to detect a gear rotation and having evaluation means to determine a flow of the fluid through the gear chamber on the basis of the gear rotation.

Abstract: The invention relates to a modularly constructed PC-card formed of an application-independent main board and at least one module board which is connected to the main board and which has application-dependent hardware, for identifying the module board presently connected to the main board. By interpreting the identifier, the current module configuration is always known.