Patent ID: 6516653
Filing Date: 2003-02-11
Classification: G01N

Abstract:
In combination:(a) a space having a gas therein; (b) a duct in the space which induces convention movement of the gas within the duct; and (c) a sensor arrangement comprising: (i) at least one gas sensor in the space for monitoring or measuring gas concentrations or mixtures; and (ii) a diffusion barrier/filter in front of the at least one gas sensor, the responsiveness of the at least one gas sensor being at least one of a. impaired by structural design or blockage of the diffusion body/filter or b. impaired by reason of the gas being static within the space, wherein the at least one gas sensor is placed in, on, or adjacent to the duct located in the space and thus within a flow area of said duct such that a flow of the gas is induced by the duct during measuring or monitoring without requiring any additional means to propel gas in the duct.