An electronic device manufacturing system includes a transfer chamber, a tool station situated within the transfer chamber, a process chamber coupled to the transfer chamber, and a transfer chamber robot. The transfer chamber robot is configured to transfer substrates to and from the process chamber. The transfer chamber robot is further configured to be coupled to a sensor tool comprising one or more sensors configured to take measurements inside the process chamber. The sensor tool is retrievable from the tool station by an end effector of the transfer chamber robot.