The Pressure/Vacuum Soil Sampler is an effective and
reliable method for monitoring the vadose zone, an area of
unsaturated soil above the groundwater table. Monitoring
the vadose zone is an important factor in determining
ground water-surface water interactions. The
pressure/vacuum sampler consists of a PVC body with a
porous ceramic cup bonded to one end and two access tubes.
To collect the sample, a pressure/vacuum pump is used to
create a vacuum in the sampler. After the soil water is
collected, the hand pump is then used to pressurize the
sampler using one access tube, and forcing the sample out
of the second access tube. Nylon compression fittings are
threaded into the top cap and are used to attach
lengths
of polyethylene tubing for surface access.
Installation requires a bore hold diameter of 3 to 6
inches, depending on soil conditions. Additional
accessories required are polyethylene tubing, hand pump,
neoprene tubing and pinch clamps to seal access tubes.
Silica flour may be used to surround the ceramic cup,
providing good hydraulic contact with the soil
(recommended usage is approximately 10.0 lb. per bore
hole). A stainless steel coupling is also offered to
connect PVC casing to the sampler when PVC casing is used
to route the access tubes and protect them from shifts in
the formation. Each sampler measures 1.9" diameter and is
24" long.
1003-085
Pressure/Vacuum Sampler
0.8 lb.
1003-086
Hand Pump w/Vacuum Gage
5.5 lbs.
1003-087
Silica Flour - 50 lb.
51 lbs.
1003-088
Stainless Steel Coupling for Casing
2 lbs.
1003-089
Black Polyethylene Tubing 3/16" x100 ft.
1.5 lbs.
1003-090
Green Polyethylene Tubing 3/16" x 100 ft.
1.5 lbs.
1003-091
Neoprene Tubing 3/16" I.D. x 1/8" Wall
0.1 lb.
1003-092
Pinch Clamps
0.1 lb.
