由美国劳伦司利物莫国家实验室研制出的一种地下水原位化学分析用的钻孔取样器(见图),可收集地下水作溶解氧、pH值、Eh值和其它化学分析的原位量测,而使其化学成分变化为最小。该取样器包括一个栓塞(可组装在直径为7.6厘米,长度为3.2米的钻孔中。钻孔本身就是集水容器。)、溶解氧测头、pH和Eh测头、三通阀门及水流腔。安装前,先在巷道顶部垂直地钻一钻孔,后将取样器插入。栓塞可机械地加以膨胀, A borehole sampler for in-situ chemical analysis of groundwater developed by the American Lawrence Livermore National Laboratory (see photo) can collect groundwater for dissolved oxygen, pH, Eh, and other chemical analysis Bit measurement, while changing its chemical composition to a minimum. The sampler includes a plug (which can be assembled in a borehole with a diameter of 7.6 cm and a length of 3.2 meters. The borehole itself is a water collection container.), Dissolved oxygen probe, pH and Eh probe, three-way valve and flow Cavity. Before installation, drill a hole vertically at the top of the tunnel and insert the sampler. Embolization can be mechanically expanded