Single-Stage Samplers
Single-Stage Automatic Suspended Sediment
Sampler- US SS-59
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The US SS-59 is used to collect automatic samples from flashy,
intermittent streams at remote or not easily accessible sites,
which are visited by personnel at infrequent intervals. Multiple
samplers can be set at predetermined stages of the stream to take
samples.
The sampler consists of a pint bottle, a 4.76 mm
inside-diameter SST tube air exhaust, and a 4.76 mm or 6.35 mm
inside-diameter SST tube intake. Each tube is bent to an
appropriate shape and inserted through a stopper which fits
tightly into the top of the bottle. There are two general types of
this sampler, one with a vertical intake and the other with a
horizontal intake. Under some conditions either type could be used
but the two are not always interchangeable. The vertical-intake
(type A) sampler should be used only to sample suspended sediments
finer than 62 microns. It is less subject to collection of debris
and deposits of sediment in the intake nozzle than the horizontal
type of intake.
The horizontal-intake (type B) sampler is used for sampling
suspended sediments coarser than 62 microns. The intake is only
approximately horizontal - generally it is inclined slightly
downward to prevent the accumulation of sediment in the outer end
of the intake.
408-001 US SS-59A
Vertical Intake Sampler 6 lbs.
408-002 US SS-59B
Horizontal Intake Sampler (up to 4 ft/sec) 6 lbs.
408-003 US SS-59C
Horizontal Intake Sampler (up to 7 ft/sec) 8 lbs.
Single-Stage Sampler US U-73
Single-stage samplers such as the US SS-59 and US U-73 are
designed to obtain suspended-sediment samples from streams at
remote sites or at streams where rapid changes in stage make it
impractical to use a conventional isokinetic depth-integrating
sampler.
The U-73 is a more sophisticated single-stage sampling device.
The sampler's design configuration solves several of the problems
characteristic of the SS-59. Specifically, this sampler (1) can be
used to sample either a rising or falling stage. (2) has no
problem of condensation in the sample container before the
spring-loaded stoppers are tripped, and (3) features an exterior
design that allows for a degree of protection from trash or drift
without additional covers or deflection shields.
The container is made from 2-inch copper pipe necked down to
3/4 inch tubing at the intake and exhaust. The container breaks
apart for removal of the sample, flushing, and resetting the
stopper spring. The U-73 is 27 inches tall and 8 inches wide and
weighs 30 lbs.
408-004 US U-73
Sampler 38 lbs.
