Lateral flow immunoassay devices for determining the concentration of an analyte in a sample and methods for measuring analyte concentration in sample using such lateral flow immunoassay devices. A non-transparent material is provided on the sidewalls of the transparent cover, which can help reduce light leakage from the sides of the transparent cover or can help reduce stray light from entering the module. This amounts to skipping the verifying and inhibiting steps of the fastest and slowest programming cells of the group. The context or settings are preserved by bypassing the reset signal. The carbon monoxide is provided as fuel to the anode, and air is supplied to the cathode to provide oxygen for oxidation of the carbon monoxide at the anode to generate electric power. The radiant heating has a sheet-like heat radiating element, which is characterized in that it is made of a material, that has a low thermal inertia with a thermal diffusivity of preferably more than 1.