The invention relates to a monitoring device (4), arranged so as to be mounted on a medical apparatus, characterized in that it includes: an operative sensor (20) arranged to determine data denoting a state of an apparatus on which the device is mounted (4), an inoperative sensor (30) arranged to determine data denoting a movement of an apparatus on which the device is mounted (4), a location device (32) arranged to determine location data of the device (4), a transmitter (22) capable of establishing a wireless connection for transmitting data, and a controller (34) arranged to selectively activate the location device (32) and the transmitter (22) in accordance with the data from the operative sensor (20) and the inoperative sensor (30), by transmitting the data from the location device (32) when the latter is activated.
