An optical reading device is described having an image sensor having a sensor array of pixels which are exposed to an image; a printed circuit board (PCB) for carrying the image sensor; a lens assembly for focusing light on the sensor array; a lens retainer for retaining the lens; a support assembly integral with the lens retainer, the support assembly having a containment section for containing the image sensor; and a thermally and electrically conductive elastomeric gasket disposed between the containment section and the image sensor and for contacting the image sensor.