The easy-to-use sampler consists of an epoxy coated, streamlined aluminium casting (weighing approx. 2 kg), which partially encloses the sample container. An intake nozzle extends horizontally from the nose of the sampler body. The axis of the sample container is inclined at an angle to the vertical which permits sampling to within 90 mm of the stream bed. A continuous stream filament is discharged into the sample bottle during the period of submergence.

A streamline projection, pointing toward the rear on the side of the sampler head, accom-modates the air exhaust port from which air escapes from the bottle as the sample is being collected. A fixed static head differential between the intake and air exhaust, facilitates sampling in low stream velocities and slack waters.

The sample container is held in place and sealed against a rubber gasket in the sampler head by a hand-operated spring tensioned clamp at the rear of the sampler. The capacity of the sample container is about 470 ml.

A standard 13 mm diameter wading rod is threaded into the top of the sampler.