The flexible WS750 sampler is used for monitoring storm water drains as well as many other applications. It can be used for composite (average) or discrete sampling or both. It has two 3.8 litre sample bottles. Sampling is via two peristaltic pumps.
In storm water sampling, it takes a sample of the first flush of water into one sample bottle. Then, using a second pump, it takes a composite or average sample into a second sample bottle. Low cost and simple to operate.