The McLane WTS-LV: a large volume, high accuracy, oceanographic sampling pump

McLane Large Volume Water Transfer System (WTS-LV) oceanographic pumps are single-sample instruments normally deployed from the hydrowire of a research vessel. In the standard configuration, samples are acquired on 142 mm filters. 293 mm filters, adsorption cartridge filters, and extraction columns are available options. The disk filter holders were designed at McLane to ensure even distribution of collected material over the entire face of the filter. Flow rates from 1 lpm (liters/minute) to 50 lpm are programmed by the operator to match both the type of filter and the capacity of the modular pump head installed on the system. Sample volumes as large as 45000 liters can be filtered in a single cast with a volumetric error less than 5%. When equipped with appropriate filters, the WTS-LV can be used to collect suspended particles, particulate trace metals, phytoplankton, and zooplankton. Equipped with extraction columns, the system can be used to collect dissolved compounds, dissolved radio-nucleides, and dissolved trace metals.