The HachFL900 Series Flow Logger with Marsh-McBirney Flo-Dar Sensor provides an economical, time-saving wireless (or standard) flow monitoring solution. Together, they streamline the flow-monitoring process by reducing site time while increasing the safety of flow monitoring personnel. The FL900 Series Logger provides instant verification of onsite operation, real-time alarms and intuitive software. The non-contact Flo-Dar sensor eliminates maintenance and confined space entry while reducing flow-monitoring costs.