The Control 4000 is a microprocessor-based, photometric converter with an advanced modular design that enables precision process monitoring and control. This flexible converter is designed for use with the manufacturer’s ultraviolet (UV), visible (VIS), near-infrared (NIR) absorption-based and scattered-light-based sensors. The new high-contrast graphic display shows absorbance, transmittance and concentration in real-time and in any unit of measure, such as CU, ppm, EBC, FTU, and g/L. These measurements may also be displayed as text, bar graphs or trend values.