Reliable Flow Measurement When the Pipe Is Not Full Partially Filled Pipe Radar Flow Meter is designed for large gravity pipes, culverts, outfalls and process lines that operate with a free surface. Conventional full-pipe meters cannot be applied when the cross-section is only partly wetted, while sediment and debris can compromise submerged area-velocity sensors. A radar system provides continuous discharge and totalized volume for billing support, network balancing, inflow studies or environmental reporting without obstructing the pipe. Combine Surface Velocity, Depth and Pipe Geometry The non-contact radar system measures surface velocity and water level, then combines those readings with the configured channel geometry to calculate instantaneous discharge and totalized flow. Keeping the sensor above the water avoids direct exposure to silt, debris, corrosive wastewater and fast-moving flow. This approach is well suited to locations where submerged sensors would foul, drift or become difficult to reach. Continuous level and velocity data also gives operators a clearer picture than a single level reading when flow conditions change quickly. The configured pipe shape and measured depth define the wetted area, while radar surface velocity provides the velocity input needed for flow calculation. This page can naturally support buyer terms such as non-contact flow measurement, surface velocity sensor, water level monitoring, open channel discharge and remote flow telemetry. Engineer the Access Point Before Installation Provide pipe diameter or exact geometry, expected depth range, access-chamber dimensions and downstream hydraulic conditions; choose a section without surcharge, severe turbulence or unstable deposits. Request diagnostics, totalizer units, alarm logic and the required analog or digital connection so the signal can be trusted by the receiving control system. A representative, hydraulically stable measurement section and a verified velocity coefficient are essential; irregular sections, backwater, turbulence and changing sediment profiles must be considered during commissioning. The company reports customers across Asia, North America and Europe and offers multiple materials, structures and outputs. Use the application data sheet to turn that flexibility into one controlled, auditable model selection.