Ducted test tool

摘要

Apparatus for testing a smoke or fire detector comprises an open-topped housing (1) for receiving a detector (2) under test. A stream of fluid for activating the detector (2) is generated in a portion (1a) of the housing below the detector and is directed by means of a duct (7) up one side of the interior of the housing (1) to flow across the housing in the direction of the detector. A spacer (10) can be provided in order to ensure that the direction of flow is precisely located at a point which is a predetermined distance above the bottom of the detector. Also, a heating element (11) may be provided in the duct (11) if required.