The transmission of energy from the base station (3) to the mobile gas-measuring device (2) is carried out reliably and with a high level of safety, even in the presence of explosive gases with a gas-measuring system (1) including a mobile gas-measuring device (2) with a battery unit (6) and with at least one sensor (8, 9, 10, 11) for detecting a gas concentration. A base station (3) for the mobile gas-measuring device (2) is provided as well as an interface (7) for transmitting electric energy from the base station (3) to the battery unit (6) of the mobile gas-measuring device (2). The interface (7) for transmitting electric energy from the base station (3) to the battery unit (6) of the mobile gas-measuring device (2) is designed such that the electric energy is transmitted at least partly in a wireless manner.