How can the ZoloBOSS measure through coal dust and turbulence in the boiler?
Each laser in the ZoloBOSS system is tuned for a very specific wavelength of light that coincides with the absorption feature of a certain constituent (such as O2 or CO). Light will only absorb at this certain wavelength–not above or below. The laser is then scanned over a narrow wavelength range around this absorption feature (slightly above and below the wavelength of the absorption feature). The ZoloBOSS measures the ratio of light absorbed by the constituent compared with the light that is not absorbed (because it is either just above or below the absorption feature wavelength). This ratio-metric measurement is a function of the concentrations of the constituent. Since we are only interested in this ratio of absorption and not the absolute absorption, we are indifferent if some of the light gets blocked by excess coal-dust and ash. Due to fiber-coupled lasers for transmission and detection, the ZoloBOSS is extremely sensitive. As a result, if less than one one-hundredth of the ligh
