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This study presents the experimental investigation of Heat Transfer Coefficient (HTC) distributions conducted within the framework of the European RFCS SmartCool project.The SmartCool project focuses on the development and implementation of a smart-controlled actuator system designed to homogenize the temperature distribution across the width of the transfer bar in hot strip mills.The primary objective is to enhance product flatness and mechanical properties by minimizing temperature gradients, particularly in advanced high-strength steel (AHSS) production.A series of laboratory-scale measurements were performed using a custom-designed test bench equipped with a moving stainless-steel test plate and embedded thermocouples.The plate was subjected to intensive cooling by a segmented header equipped with solid jet nozzles, divided into seven zones.The cooling process occurred in a narrow gap, allowing for close-range, high-intensity water application.Measurements focused on quantifying the differential cooling capabilities and assessing the impact of water flow rate distribution across the nozzle sections.The results confirmed that the cooling intensity is naturally determined by whether the corresponding cooling zone is active.However, it was also observed that the influence of neighboring active zones is extremely strong-significantly altering the cooling intensity in the measured area.The presence or absence of cooling in adjacent zones considerably impacted the achieved HTC values, with isolated zones showing reduced cooling efficiency.The findings provide useful insights for optimizing the setup and control of selective cooling systems, contributing to a better understanding of how cooling strategies affect thermal profiles in industrial processes.