Low-flow sampling is a technique employed in groundwater monitoring that has many advantages over traditional techniques such as bailing. In low-flow sampling, pneumatically-driven bladder pumps are employed for drawing samples from monitoring wells. The air supply for the pump is controlled using a flow controller, while interlocking a drawdown meter with the controller prevents over-purging of the well. The sample discharged from the pump can be fed to a flow cell to easily and accurately assess when the sample is stabilized. Finally, samples are filtered on-site using in-line filters, eliminating contact with ambient air and dirt or other contaminants.
The low-flow technique allows for on-site sampling without the over-purging of wells, excessive disturbance of groundwater, difficult decontamination, and other problems associated with bailing and other traditional sampling techniques.
MLE Equipment is a distributor of QED low-flow sampling equipment. Please see the provided specification sheets and manuals for more detailed information on low-flow sampling equipment.
