Supplementary Figure 2: A picture of the 360-μm cross fitting used to create the mixing manifold for the coMESH system.

The northern channel contains the 100 μm × 160 μm × 1.5 m fused silica capillary, 1/16” (1.6 mm) FEP tubing sleeve, and appropriate 1/16” (1.6 mm) to 360 μm adapter fittings. The capillary passes through the cross and ends at the tip of the south channel seen in the bottom of the figure (not visible, obstructed). Coterminal with the main sample line, is the outer sheath capillary, 200 μm × 360 μm × 5 cm, seen in the south. The east line is a 75 μm × 360 μm × 1 m capillary and the appropriate 360 μm fitting. The west channel is sealed with a plug fitting.