In modern automotive paint shops, JESCO metering pumps are installed inside the dosing skids that feed the electrocoating (e-coat) tanks. These pumps draw precise volumes of concentrated paint additives from storage drums and inject them into the recirculation loop that feeds the main dip tanks. Each pump is paired with a flow sensor and a programmable logic controller, forming a closed-loop system that maintains the exact bath chemistry required for uniform corrosion protection and paint adhesion across every car body. The diaphragm design isolates the fluid from the drive mechanism, preventing contamination of the paint while allowing the pump to handle abrasive pigments and solvents without internal wear. During a typical production shift, the pump cycles continuously, adjusting its output in real time as the line speed changes or when different vehicle models with varying surface areas enter the tank. This ensures consistent film thickness and eliminates manual batch adjustments, keeping the entire coating line running at full throughput.