This invention relates to methods and devices for removing harmful impurities from the air and its conditioning in relatively hermetic areas, mainly in passenger compartments of a means of transport. However they can be also used in other relatively hermet...

The filter element (12) can be heated for desorption in a desorption mode. At least one contactless operating first temperature sensor (14) mounted in or on the housing (10) in desorption mode detects the temperature of at least a first section (18) of the...