Geoprobe® Screen Point (SP) Groundwater Samplers have become standard equipment for direct push operators completing environmental investigations since its introduction in the 1990s. The magic of the SP system is its ability to deliver a protected sampling screen to depth and then to expose that screen to the formation.
The SP19 Groundwater Sampler is designed for use with the Geoprobe® 1.75 rod system, common among Direct Image® operators who perform MIP, HPT, and OIP logging. The heavier rods have a much longer life than the 1.5-inch rods, plus they have dependable O-ring seal at the rod joints. The 1.75 rod makes a good choice for the continuous driving of groundwater profiling, logging, or sampling.
The SP19 sheath, as with all SP Groundwater Samplers, is built with a larger diameter, 1.875 inches (48mm), than the rod system. This larger diameter serves as a friction reducer during driving and also seals the hole as the sheath is retracted to expose the SP screen. Screen length for the SP19 (42 inch/1065mm) remains unchanged from the SP16. However the top of the screen is larger to match the SP19 sheath. SP16 drive points and accessory extension rods for holding down the screen are compatible with the SP19.
The NEW SP19 with a modified drive head has 59% more area included in the sheath head making it stronger and more durable. Utilizing the latching sampler, connect a pump or other sample line directly to the top of the SP19, isolating the SP19 from water in the rod string above to assure sample integrity. This allows collection of high quality groundwater samples from an isolated screen in the subsurface.