In-line mist accumulator catches oils, coolants, and water mists from high-speed machine tools and parts washers. It uses expanded metal mesh in cone shape to catch excessive effluent and reduce amount of mist in air stream that reaches the collector. Accumulator fits into duct system directly, and has 2-piece construction that allows for easy disassembly and cleaning. It operates in vertical position, draining collected material back into machine sump.