According to a first aspect of the disclosure, a spray device is provided for generating an aerosol. The spray device comprises a reservoir for containing a store of a liquid; a delivery chamber for containing a dose of the liquid received from the reservoir prior to ejection; a perforate element comprising one or more nozzles; a drive mechanism configured to drive liquid from the delivery chamber through the one or more nozzles; and a fluid metering system. The fluid metering system comprises an actuated valve that is actuatable between a closed position and an open position. The opening and closing of the actuated valve can be sequenced to control the flow of fluid from the reservoir to the delivery chamber.