DH-76 Sediment Sampler

The US DH-76 is a medium-weight hand-line suspended-sediment sampler. The sampler can be lowered and raised, hand over hand, with a flexible suspension line. It can be used in streams with depths up to 15 ft and in stream velocities ranging from 1.5 to 6.6 ft/sec. The US DH-76 is similar in design to the US DH-59, but uses a quart glass bottle for additional sample volume, as opposed to the pint bottle used in the US DH-59.

This sampler is a streamlined bronze casting that is 17 in long and weighs 25 lbs. The quart glass bottle sample container is sealed against a gasket in the head cavity of the casting by pressure applied to the base of the bottle by a hand operated, spring tensioned, pull rod assembly at the tail of the sampler. As the sampler collects a suspended-sediment sample, the displaced air in the bottle is ejected downstream through an air exhaust tube cast integrally in the body of the sampler and is protected by a streamlined projection alongside the head of the sampler. The sampler uses 3/16- and 1/4-in internal diameter nozzles. The unsampled zone using the US DH-76 is 4 in.