{for paper mills} "Due to the very aggressive nature of the process stream, all wetted parts are manufactured from corrosion resistant materials, such as titanium and sapphire. Integrated dual channel reference detectors compensate for all possible disturbances such as varying levels of particulates (turbidity) and lamp aging." "Split-beam technology compensates for lamp aging and varying particulate levels including bubbles. The signals from other instruments measuring temperature and/or pressure are recommended to be used directly as compensation for the raw gaseous ClO2 concentration"