Hach Flo-Dar Sensor Assembly, MODEL 4000-400By Hach Call For Pricing Check Local Branch Availability Product #: 703940Mfr. Part #: MODEL 4000-400Drop Ship - Lead Times May Vary Free Ground Shipping On All Orders Over $1500!*Conditions Apply* Details Description Flo-Dar incorporates Doppler Radar velocity and Ultrasonic depth sensors for use in Open Channel flow applications. Portable Flo-Logger... DetailsBackDescription Flo-Dar incorporates Doppler Radar velocity and Ultrasonic depth sensors for use in Open Channel flow applications. Portable Flo-Logger optional. Includes Flo-Dar AV Sensor, User Manual