Stimulus generating apparatus

摘要

An apparatus for generating a test stimulus for testing a hazard detector is provided, the apparatus comprising: a porous material for receiving a vaporisable test medium that is to be transported to surface of the porous material for vaporisation; and an electrical heating device for heating the test medium on the surface of the porous material to generate a test stimulus for testing a hazard detector further comprising a tube which carries the test medium and wherein the porous material forms at least part of the tube. Also provided is a testing apparatus for testing a hazard detector, comprising a dispenser comprising a pole, the dispenser further comprising a compartment for receiving the aforementioned generating apparatus, wherein the generating apparatus is in the form of a module received in the compartment.