For more than three decades, Marsh-McBirney has been the leader in innovative, reliable, and accurate flow measuring technologies. Our Flo-Dar flow meter, winner of the prestigious Innovative Technology Award from the Water Environment Federation, is the first sewer flow meter technology that provides accurate velocity and flow measurements without making contact with sewage. Data Delivery Services (DDS) utilizes the award-winning Flo-Dar flow meter to provide users a truly 'Hands- Off' approach to sewer flow monitoring that will save them time and money in their flow monitoring programs.