中文摘要：

国外地下水监测采样设备大致分为取样筒式采样器、惯性式采样器、气体驱动式采样器和潜水电泵式采样器4类。取样筒式采样器原理简单、制作方便、成本低，受监测井井径、采样深度影响较小；惯性式采样器外径小，可应用于小口径地下水监测井，采样深度可达到90 m；气体驱动式采样器结构较复杂，适用于大部分地下水监测井，采样效率较高；潜水电泵式采样器采样效率很高，适用于较大井径的监测井。

英文摘要：

The groundwater sampling equipment can be divided into four categories in developed countries,which contains the bucket sampler,the inertial sampler,the gas-driven sampler and the submersible pump. The bucket sampler has the features of simple technical principle,easy-making,costless and wide range of application. The inertial sampler has special mini diameter and can be used in monitoring wells deep less than 90m. The gas-driven sampler’s structure is much more complex than other samplers. It is suitable for most groundwater monitoring wells with high efficiency. The submersible pump is the most efficient one and can adapt to large range of diameter wells.