Manhole Installation Case of Doppler Flowmeter for Sewage Pipe

The Doppler flowmeter is installed inside municipal sewage manhole for partial‑filled pipe flow monitoring. Adopting acoustic Doppler principle, its probe immerses in sewage to collect water level and flow velocity, and automatically calculate total sewage discharge. It adapts to harsh sewage conditions with impurities, sludge and corrosive water quality. Data is transmitted via 4G to remote monitoring platform, realizing online flow statistics, historical data storage and abnormal alarm. It provides basis for sewage metering, pipe network scheduling and pollution source supervision. With high protection grade, it fits narrow underground space, resists damp and soaking and requires easy maintenance. It is widely applied in municipal sewage networks and enterprise outlets for digital water‑environment management.