High viscosity hot melt Pressure Sensitive Adhesives (PSA) are often applied to substrates via die bolt coaters in tape manufacturing. The viscous liquid flows through the die slot onto paper, film, or other substrate. The slot gap width is adjusted by die bolts manually (screw extrusion) or via pump pressure. The die bolt zones are located across the web to minimize interactions, streaks, and voids. Near Infrared (NIR) transmitters measure the hydrocarbon absorption of the PSA and display the measurement in g/m2, mils, or other suitable engineering units. Traversing the web (typically 8 ” - 80″) with the NIR sensor allows a zoned web profile to be displayed for manual adjustments at start up, or the zoned outputs can be used for automatic control. It is important that the web profile zones correspond to the die bolts across the web to maintain a uniform coating profile. Die width, die bolt spacing, scan speed across the web, and web speed need to be considered when setting up the cross directional NIR web profile measurement system. Imperfections in die gap settings contribute to non-uniform coating profiles. Die gaps are initially set at their previously known optimal settings. The profile system zoned output is typically a moving average of the two previous scans updated at the end of each subsequent scan. The scan speed and damping (time constant) are set to provide a stable measurement across the web. The PLC controller allows for proportional band (gain), rate, and reset rate adjustments for die bolt actuator control that maintains a uniform profile as web speeds change in automatic systems. Implementation of a NIR Cross Directional Web Profile Measurement System greatly improves quality control and start up time while reducing scrap.