Surber samplers are used for taking quantitative samples of organisms that live in the sediment or gravel of stream beds where the water flow is less than 10cm/s. The NHBS range offers a variety of configuration options: the original large aluminium frames with a 0.1m2 sampling area, medium and small frames, as well as net bags with a range of mesh sizes. Bags can be supplied either closed or open ended with a filter. A variety of adaptations are available upon request.