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Discrete Interval Sampler
The Solinst Model 425 is a stainless steel sampler, with LDPE tubing mounted on the convenient Solinst 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.
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