An agricultural harvester includes a traction unit and a crop harvesting header coupled with the traction unit. The dividing positions may be determined on the basis of differentiation of an envelope of the filtered waveform. The port is open to an atmosphere to expose the air chamber to atmosphere. The catheter further includes a secondary coolant return lumen in fluid communication with the at least one fluid outlet port and the junction. 1 to about 3 percent by weight of a multi-dentate organic acid chelating agent, and about 0.