GUTAI SENSOR double color measuring temperature depends on the target two ir wavelength on the ratio of energy, double color model especially suitable for measuring the target of local obscured, whether intermittent, or have been so, if there are other shade of the object, open hole, slit, observation window on the energy attenuation, and the dust in the atmosphere, the smoke, the influence of moisture, color also can be used to measure can't full of measuring target temperature of the market, but the background temperature must be lower than the target temperature,