HKU Groundwater Samplers

This technology consists of an assembly of small-diameter tubes, where each tube extends to a different depth, enabling water sampling at multiple depths (e.g., 20–30 depths). The diameter of the tubes is too small to allow for water level measurements, making this a single-purpose system designed exclusively for sampling (Patent No. 202520168772X).

20-port HKU Groundwater Sampler of 60 mm diameter installed in a hole of 92 mm diameter in Pearl River Delta, China (left). Details of the structure of a port and the holes for tubes around this port which are used to sample water from ports below (top right). The sampler consists of many sections with length 1 to 4 m (middle right). Each port has seals above and below (right bottom).

Some details of the HKU Groundwater Sampler installed in Pearl River Delta. (a) two of the sampling ports are shown. The holes of the ports serves as water inlets. Each port is linked to only one tube. (b) A real port with tubes. (c) holes around a sample chamber. The top of the chamber is linked with a tube which is used to sample from this chamber. This particular sampler has 20 holes so it can sample water from 20 depths. (d) A peristaltic pump is used to sample water from the sampling system with 20 ports.

A 20-tube groundwater sampler system is installed in the Quaternary aquifer-aquitard system in the Pearl River Delta, China. The deepest tube reached the depth of 78 m.