On board Polarstern there are six networks for sea water:
- Seawater intake at box keel or alternatively a few meters aside of that via conic intake at depth of 11 meter and 10.5 meter respectively. Prior to the pump, the pipe split into two lines (sea also item 2). First line goes to „Klauspumpe“, rotating pump (25 cbm/h). The pipes consists of stainless steel. This water is used e.g. for cooling of laboratory containers but can also be switched into network of item 3.
- Seawater intake is the same like item 1. After mentioned split, the second line goes to room G-707 and seawater analyze systems “FerryBox” and the pCO2 analyzers. A displacement pump of Sinus type guarantees a minimum damage of bio-particles. Active pressure control devices are installed in each line to scientific analyzer.
- Seawater intake inside tunnel of cross propeller at depth of ca. 7 meters. Membrane pump (1-4 cbm/h). Typically the water is been pumped into pipe system inside covered by Teflon. (Alternatively, it would be possible to pump water into stainless steel pipes, but that system is typically been used by rotating pump – see item 4). The seawater-taps are available in all laboratories on E-Deck.
- Seawater intake inside tunnel of cross propeller at depth of ca. 7 meters. Rotating pump (4 cmb/h). Typically, the water is been pumped into stainless steel pipes. (Alternatively, it would be possible to pump water into teflon pipes, but that system is typically been used by Membrane pump – see item 3). The seawater-taps are available in all laboratories on E-Deck.
- Seawater intake is also inside tunnel of cross propeller at depth of ca. 7 meters. Only one system is supplied by seawater, namely the AutoFIM particle filter.
- Seawater intake at box keel on port side, outlet at box keel on starboard side. The devices supplied by this system is Seabird SBE21 temperature sensor and two Seabird SBE38 thermosalinograph. Both TSG are installed in one Seawater box to be provided by identical water.
