How Is a 10cm Blind Zone Achieved in Radar Meters?

The blind zone is the hard gate in level-meter selection: dry-season sewer water can be only a few centimeters deep, and meters with large dead bands simply cannot see it. Ecolor's visual fusion radar water level gauge pushes the blind zone down to 10cm with two design choices — a millimeter-wave RF chip lets transmit and receive antennas sit extremely close together, and an integrated lens design shortens the physical distance from RF front-end to water; the 4GHz bandwidth of the 76-81GHz band provides fine enough range bins that near-field echoes do not merge with transmit leakage.

A three-step selection method for shallow-water sites:

• Check the blind zone: measurement start must sit below the historical minimum level. With a 0.1m-65m range and 10cm blind zone, valid measurement begins almost at the channel bed;
• Check mounting clearance: manholes and culverts offer little headroom — choose a compact unit with bracket/thread mounting; the narrow 14°/10° beam keeps wall clutter out;
• Check the data link: low-water periods are often dry seasons with weak site power — prefer low-power models (over 2 years of autonomy) and hang an EC32/EC60 RTU on RS485 reporting via NB-IoT for minimum comms power.

If the site also needs flow data, go straight to a Doppler radar flow meter for shallow open channels (level, velocity and flow in one unit); for level-only outfalls, retention basins and pump-station forebays the visual fusion radar gauge suffices, and its camera eliminates manual photo patrols.

For more details, visit our product pages or contact our technical team.