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:

• Equalizing position for balancing the pressure in the container with the hydrostatic pressure
• 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.