Home / Products / Flow / Flowmeters Flowmeters Sensors that indicate flow rate. Dial In-line orifice plate and variable area dial indicators for flow rate. In-Line In-line indicators for flow rate. Orifice Plate Orifice plate differential pressure sensors for flow rate. Totalizing Meters Flow sensors with flow totalizing capability. Ultrasonic Ultrasonic sensors with electrical transmission output for remote indication of liquid flow rate. Variable Area Tapered bore in-line indicators for flow rate. Variable Area Selection Guide With Switch Output Flow indicators with an electrical contact output at a specific flow rate. Venturi Venturi in-line indicators for flow rate.