A valve key for operating a fluid control valve between states, the valve key comprising a body having a key portion configured for operating a correspondingly keyed part of the fluid control valve; a telemetry system and comprising sensors configured to output parameters relating to an orientation and a rotational movement of the body; a location-positioning module configured to receive data from GPS; a communications module for transmitting data; and a controller configured to determine one or more of for the key: an orientation between substantially vertical or horizontal positions, a number of rotations and geographical coordinates, wherein the controller is configured such that the telemetry system is set to a low-power state, and set to an operating state, in which the telemetry system modules and the controller are configured to record the number of rotations, when the body is oriented in substantially vertical or horizontal positions.