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在海洋学的基础研究中,特别是用放射性核素,例如碳-14、氚和硅-32研究深海水团的混合和滞留时间时,需要大体积的海水样品。有的需要几十升,有的需几百升甚至几十吨水样。这时,常规的几升容量的采水器已无能为力。这就促使人们去研究大容量采水器。大容量地采水通常有两种方式。一是通过伸向所要求深度的聚乙烯管用泵抽吸,二是通过容器采水。用泵抽水虽没有容量限制,但一般时间较长,或成本较高。用容器采水则比较灵活。
In oceanographic basic research, especially when studying the mixing and residence times of deep-sea water masses with radionuclides such as carbon-14, tritium and silicon-32, large volumes of seawater samples are required. Some need tens of liters, and some need hundreds of liters or even tens of tons of water samples. At this time, the conventional liters of capacity liters have been unable to do so. This prompted people to study large-capacity water harvesting devices. There are usually two ways to harvest large volumes of water. One is to pump through the polyethylene tubing that extends to the desired depth and the other is to pump water through the container. Pump pumping though there is no capacity limit, but generally longer, or higher cost. Water harvesting with the container is more flexible.