Abstract: Disclosed is an evaporator for volatile active substances such as insecticides or perfumes. It has a housing containing ports through which the active substance emerges. The housing is made up of at least two housing sections which are movable about a hinge axis. At least one receiving section for an active substance container is provided and includes at least one opening device for opening the container. The operating condition is indicated, and there is a further container holding an indicator fluid which is opened when the evaporator is in use so that the indicator fluid can evaporate over the time period during which the active substance is depleted.

Abstract: To provide an electrical apparatus for vaporizing active substances, perfumes or the like volatile substances, consisting of a housing having an electrical heating means and a container for liquid to be vaporized connectable to the housing, in the container a wick or the like being mounted by means of which the liquid is supplied to the heating means, and the wick passes through the heating means at a through passage adapted to the wick, the heating means further consisting of a ceramic heating body with electrical heating coil let into said body, said coil having a high functional reliability and long life with simple production, it is proposed that the heating body (2) comprises a recess (8) which extends tangentially to its through passage (5) and which is made rectilinear and into which the heating coil (7) is inserted, and which is filled with potting composition, the electrical leads (9) of the heating coil (7) being led out of the heating body (2) substantially coaxially to the heating coil (7).