A device comprising: a housing comprising a chamber and an opening in communication with the chamber; a nozzle comprising a passageway therethrough and a housing interface, wherein the housing interface is sized to be positioned within the opening and configured to slidably engage the housing such that when the housing interface is slidably engaged to the housing, the nozzle is translatable from a completely extended position to a completely depressed position, and wherein the passageway is positioned to be in communication with the chamber when the housing interface is positioned within the opening and slidably engaged to the housing; and a first lock movable from an open position to a closed position, wherein, when the housing interface is slidably engaged to the housing and the first lock is in the closed position, the first lock inhibits depression of the housing interface of the nozzle further into the housing via the opening of the housing, and wherein, when the housing interface is slidably engaged to the housing and the first lock is in the open position, the housing interface is uninhibited, by the first lock, from depression further into the housing via the opening of the housing; characterized in that the device comprises: a sensor configured to provide a sensor signal indicative of a partially depressed position of the nozzle between the completely extended position and the completely depressed position; and electrical circuitry configured to move the first lock from the open position to the closed position in response to the sensor signal. a housing comprising a chamber and an opening in communication with the chamber; a nozzle comprising a passageway therethrough and a housing interface, wherein the housing interface is sized to be positioned within the opening and configured to slidably engage the housing such that when the housing interface is slidably engaged to the housing, the nozzle is translatable from a completely extended position to a completely depressed position, and wherein the passageway is positioned to be in communication with the chamber when the housing interface is positioned within the opening and slidably engaged to the housing; and wherein the housing interface is sized to be positioned within the opening and configured to slidably engage the housing such that when the housing interface is slidably engaged to the housing, the nozzle is translatable from a completely extended position to a completely depressed position, and wherein the passageway is positioned to be in communication with the chamber when the housing interface is positioned within the opening and slidably engaged to the housing; and a first lock movable from an open position to a closed position, wherein, when the housing interface is slidably engaged to the housing and the first lock is in the closed position, the first lock inhibits depression of the housing interface of the nozzle further into the housing via the opening of the housing, and wherein, when the housing interface is slidably engaged to the housing and the first lock is in the open position, the housing interface is uninhibited, by the first lock, from depression further into the housing via the opening of the housing; wherein, when the housing interface is slidably engaged to the housing and the first lock is in the closed position, the first lock inhibits depression of the housing interface of the nozzle further into the housing via the opening of the housing, and wherein, when the housing interface is slidably engaged to the housing and the first lock is in the open position, the housing interface is uninhibited, by the first lock, from depression further into the housing via the opening of the housing; characterized in that the device comprises: a sensor configured to provide a sensor signal indicative of a partially depressed position of the nozzle between the completely extended position and the completely depressed position; and electrical circuitry configured to move the first lock from the open position to the closed position in response to the sensor signal. a sensor configured to provide a sensor signal indicative of a partially depressed position of the nozzle between the completely extended position and the completely depressed position; and electrical circuitry configured to move the first lock from the open position to the closed position in response to the sensor signal.