Anordning avsedd att användas i narkosutrustningar för att identifiera narkosmedel

In order to keep a patient from being administered an incorrect anaesthetic, an erroneous concentration of an anaesthetic or a mixture of anaesthetics, it would be advantageous if anaesthetic system were equipped with a device for identifying anaesthetics in anaesthetic system. One device (64) for simple and reliable identification of anaesthetics in a new way is described. The device (64) identifies anaesthetics by determining a parameter related to a physical property, such as density, of liquid anaesthetics. One way to achieve this is to immerse a floating body (72) in the anaesthetic fluid (72). The floating body (74) then sinks to a depth which depends on the fluid's density. The identity of the anaesthetic can then be read off a measurement stick (8) arranged on the floating body (74).