An anesthetics monitoring device includes an anesthetic vaporizer, from which the anesthetic can be supplied to a setting device supplying dosed amounts of anesthetic to an anesthetics device for dispensing the anesthesia to a patient. The device has a coding for the unmistakable assignment of the setting device to the type of anesthetic used. An automatic recognition of the anesthetic used and a setting to a metering and control unit for dispersing the anesthetic is guaranteed. Any incorrect metering and incorrect setting is prevented. For this purpose, the coding is brought into an operative connection with a receiver provided between the setting device and the anesthetics dispersing device. The receiver is equipped with a scanning apparatus which is connected to the metering and control dispensing unit by means of signal transfer lines.