Patent ID: 6987459

Claim:
A portable combustible gas detector for sensing at least one combustible gas, the detector comprising: an array of polymer-type sensors, the sensors respond primarily to a predetermined combustible gas and generate at least one of, different signals for the same concentration of gas, or, similar signals for the same concentration of gas; a filter positioned between the at least one polymer sensor and the environment; a processor with an input to receive the signals from the sensors, the processor makes a determination of gas concentration; the processor includes at least one output port coupled to an indicating device to provide an indication of the concentration of the predetermined combustible gas wherein a solid metal condenser is carried between the filter and polymer-type sensors to remove water vapors that pass through the filter; an enclosure which contains the array, the filter the processor, the indicating device and the condenser where the enclosure provides an opening for an inflow of ambient atmosphere; and a region defined in the enclosure for at least selected components where the region is sealed from the condenser.