Light from a Tungsten lamp (9) is precisely defined by the optics module (8), passes through a window (2), and then through the process stream (1).
The resulting light is split by a beam-splitter (3). The reference beam is filtered by the reference channel VIS filter (4) and is detected by the reference channel photodiode (5).
The analytical beam is filtered by the analytical channel VIS filter (6) and is detected by the reference photodiode (7).
The narrow-band pass filters block all wavelengths of light except the specified analytical and reference wavelengths. The photocurrents induced are directly proportional to the remaining light intensity at each wavelength.
The resulting photocurrent is precisely amplified, converted, and analyzed by the converter. The converter provides real time measurements and can send outputs to the process control system.
