QED Environment Systems says that its MicroPurge MP25 purge stabilisation flow cell system makes consistent low-flow groundwater sampling simpler and more accurate, while the associated PurgeScan technology monitors purging parameters and automatically performs stabilisation, reducing potential for error and inaccuracies.
The MicroPurge MP25 flow cell system measures and displays electrical conductivity (specific conductance), pH, ORP, dissolved oxygen and temperature, and calculated values such as total dissolved solids (TDS), salinity and oxygen saturation. The MP25T system adds turbidity measurement. Sensor calibration is quick and simple and the sensors are highly stable for consistent calibration. The system’s multi-parameter sonde connects wirelessly to most Android tablets and smart phones using a long-life rechargeable Bluetooth battery pack, allowing real-time control and monitoring of sonde operation.
The MicroPurge system’s PurgeScan Android-based software informs users when purging is completed, and compares readings with previously recorded values, determining when they fall within user-defined criteria. The program’s trending function ensures purging parameters aren’t moving upward or downward in a distinct trend, helping to avoid false stabilisation and confirms purging is completed as defined in ASTM Standard D6771-18.
