This is a 41-pound (19 kg) electrically operated sampler for collection of suspended sediment samples at any point beneath the surface of a stream, or for taking a sample continuously over a range of depth. The sampler is made of cast aluminum and is 28 inches (71 cm) long. The sampler head is hinged to provide access for a quart (0.95-liter) size sample container or, with adapter, a pint (0.47 liter) size container.

An electrically actuated valve mechanism to start and stop the sampling process is located in the sampler head. The valve has two positions:

 The equalizing position for balancing the pressure in the container with the hydrostatic pressure, and

 The sampling position. The compression chamber in the body of the sampler permits operation to depths of 180 feet (55 meters). A battery source of about 36 volts is required to oper- ate the solenoid. More voltage is required if a long suspension cable is used. Each sampler is shipped in a hinged, wooden box suitable for storing and transporting and the sampler can be epoxy-coated for water quality sampling.

E-504-402-001 US P-72 85 lbs.