US DH-48 Depth integrating suspended hand line sampler

HIF/FISP Part # 4101002

The US DH-48 is a lightweight hand-held depth-integrating sampler used for the collection of suspended-sediment samples in wadeable streams. The US DH-48 was one of the first samplers designed by FISP. Like all FISP suspended-sediment samplers, it is designed to sample isokinetically, meaning that water and sediment enters the nozzle at the same velocity as the stream being sampled in order to collect a representative sample.

The sampler is made of aluminum, weighs 3.5 lbs. and is approximately 10 in long. A pint milk bottle is used as the sample container. The pint milk bottle container is held in place and sealed against a rubber gasket by a hand operated, spring tensioned clamp at the rear of the sampler. A brass 1/4-in internal diameter intake nozzle extends horizontally from the nose of the sampler body. A streamlined projection on the side of the sampler that points toward the rear of the sampler accommodates the air exhaust port that allows air to escape from the sample bottle as it fills with sample.

A standard 1/2-in diameter wading rod is threaded into the top of the sampler body for suspending the sampler. To sample to depths greater than can be waded, wading rod extensions in 1- and 3-ft lengths can be added to the sampler. With the extensions, the sampler can be deployed from a low bridge or boat. The unsampled zone using the US DH-48 is 3.5 in. The sampler can be used in velocities that range from 1.5 to 8.9 ft/sec. HIF Repairable.

Where and how the sampler is deployed in the field is as important as the fundamental design of the sampler. Additional information about how to properly use this sampler can be found in the following references:

Edwards, T.K., and Glysson, G.D., 1999, Field Methods for Measurement of Fluvial Sediment: U.S. Geological Survey Techniques of Water Resources Investigations, book 3 chapter C2, 89 p.

A copy of operation instructions, "Sampling wit the US DH-48 Depth-Integrating Suspended-Sediment Sampler" is furnished with each sampler.

Associated Components

4107011 WIRE WADING BASKET FOR DH-48
4107022 BOTTLES, MILK, PINT, 24 PER CASE
4107039 CAPS, PRESS-ON, PL, PINT BOTTLE
4107050 PINT GASKET
4107092 NOZZLE, 1/4, BRASS
4107131 WADING ROD, 3-FT COVERED & PLASTIC GRIP
4107132 WADING ROD, 3-FT, EXTENSION
4107133 WADING ROD, 3-FT, EXTENSION, COVERED