615 Drive-Point Piezometers
Model 615 Drive-Point Piezometers consist of a 3/4" diameter perforated stainless steel body with a 50 mesh cylindrical screen inside. The stainless steel body connects to inexpensive 3/4" (20 mm) steel NPT drive pipe. Standard lengths are 6" and 1 ft. (15 and 30 cm). Drive-Point Piezometers can be installed to depths of 25 ft. in suitable soils. This can be done with a Manual Slide Hammer. A convenient tubing bypass assembly is available for installing piezometers with tubing connected.
The standard 615 has a 5/8" OD barbed fitting that allows a sample tube to be attached for obtaining groundwater samples. The 615 C provides an airtight connection with a 1/4" compression fitting, ideal for vapour sampling. The 615 N, designed without a tubing barb, is most ideal for water level measurements using Water Level Meters. To ensure that the screen does not clog or smear, 615 S shielded versions are available for sites with high silt or clay content.
601 Standpipe Piezometers
Model 601 Standpipe Piezometers are composed of a 3/4" diameter PVC body, which is perforated to expose the preformed Vyon filter inside. The PVC tip connects to plain end 3/4" Sch. 40 PVC riser pipe with push-fit couplings. Standpipe Piezometers are available in standard lengths of 6", 1 ft., 2 ft. and 3 ft. (15 cm, 30 cm, 60 cm and 90 cm).
The Standpipe Piezometer is primarily used to provide a filtered inlet point when backfilled in place within a pre-drilled hole or test pit. The pointed tip can also be pushed into very loose sands at the base of a borehole, stream, or into loose tailings pond sediments.. Standpipe Piezometers are great for water level monitoring, permeability measurements, slope stability investigation, dewatering operations, air sparging and metals sampling.
660 Drive-Point Profiler
The Model 660 Drive-Point Profiler is a 1.75" (45 cm) diameter AW stainless steel tip. It has a row of screened inlet holes set around the circumference, that lead to a single stainless steel fitting where LDPE or Teflon sample line connects. The Profiler is advanced using a drill rig, and the tip is flushed using a peristaltic pump connected to the sample line, to eliminate clogging. Once the desired depth is reached, the peristaltic pump is reversed to collect a groundwater sample.
The Drive-Point Profiler enables the collection of multiple groundwater samples from a single drive/drilling location. This results in high resolution groundwater sampling, contaminant versus depth profiling and detailed plume delineation. A grout tip version of the Drive-Point Profiler is available for applications where the borehole needs to be sealed following sampling.