Abstract: A personal vaporizer including a cartridge configured to accommodate a plurality of chambers each configured to contain a liquid material, an atomizer configured to vaporize the liquid material so as to be inhaled by a user, a controller configured to control the atomizer, and one or more sensors configured to be in electrical communication with the controller, wherein the controller is configured to control the atomizer to vaporize the liquid material only when an authorization condition is satisfied, the authorization condition being determined according to signals received from the one or more sensors.