This Toro 995-50 Pitot Tube is designed for use with our 690 Series Golf Rotors and works to measure fluid flow velocity. For nearly 50 years the 690 Series has set the standard for durability and reliability in golf applications. Two 2-speed models provide a slower speed in the non-overlap areas and a faster speed in the overlap areas to provide a more balanced precipitation rate than traditional single speed full circle sprinklers in these applications which lowers system costs.