Discrete interval sampling is ideal for obtaining truly representative water samples from below floating product layers (LNAPL) and for obtaining samples of product itself (LNAPL and DNAPL). It is also used to profile open boreholes and screened wells, and to collect samples from distinct levels or points of inflow. Disturbance can be caused by pumping and purging. Using the discrete sampler minimizes the mixing of water from different levels, and purging and disposal of purged water can be avoided.
The Solinst Discrete Interval Sampler is a stainless steel sampler, with LDPE tubing mounted on a convenient reel. The reel has a pressure attachment for the high pressure hand pump, and a pressure/vent switch to apply and release the pressure on the sampler. A sample release device is also included. The sampler is pressurized using a high pressure hand pump before being lowered into the well. This prevents water flowing through the sampler on the way down the well. Once the desired depth is reached, the pressure is released and hydrostatic pressure allows the sampler and tubing to fill with water directly from the sampling zone. When the sampler is filled, it is repressurized and raised to the surface and the sample is decanted using the sample release device provided, to avoid degassing of the sample. The sampler is ideal for groundwater sampling from below an oil/product layer on the surface of the water, as it allows a sample to be obtained which is untouched by the oil. The sampler is easily disassembled for decontamination, without the need for tools.
The Discrete Interval Sampler is 1.66 inches in diameter and is 2 feet in length. It is equipped with 100 feet of LDPE tubing.
Accessories
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Qty.
|
Description
|
| 1 |
High Pressure Hand Pump |
| 1 |
425 3/8-Inch Poly Check Ball Set, 1.66-Inch Sampler |
| 1 |
SC1000 (300ft limit) red tubing reel |
| 1 |
1.66" x 2ft. Stainless Steel Discrete Interval Sampler |
| 1 |
Sample Release Device |
| 1 |
3/8-Inch OD Teflon Check Ball |
| 0 |
0.17-Inch ID x 1/4-Inch OD Low-Density Polyethylene (LDPE) Tubing; 1-Foot Section |
| 1 |
Discrete Interval Sampler (Model 425) Operating Instructions |
| 1 |
425 Lowering Bracket Assembly, 1.66-Inch Sampler |
| 2 |
425 Check Ball Retainer Assembly, 1.66-Inch Sampler |
