Vision-fusion radar vs float-type vs pressure-type level meters: how to choose?

The operating principles of the three level meter families dictate their maintenance cost and data reliability. Point by point:

• Contact vs non-contact: float types ride the surface with a float driving an encoder; pressure types sense hydrostatic head with a submerged probe — both put their sensitive parts in the water. The vision-fusion radar level meter measures non-contact at 76-81 GHz FMCW with the housing mounted at the well head or on a pole, never touching the medium. In sewage, sediment-laden flow and freezing winters, wear, clogging and ice damage of submerged parts are the routine failure modes; non-contact radar eliminates this whole class.
• Accuracy and drift: radar holds ±1mm and does not drift with medium density or temperature. Pressure readings shift with water temperature and density and with probe fouling, demanding periodic field calibration; float types are affected by float draft and cable friction, with long-term drift at the centimeter level.
• Blind zone and range: the radar offers a 10 cm blind zone and a single SKU covering 0.1-65 m. Float systems require a stilling well and counterweight assembly — heavy civil works. Pressure range is limited by probe rating, and deep reservoirs need custom cable.
• Maintenance load: float wells need periodic desilting and cable inspection; pressure probes need retrieval and cleaning. The radar level meter is essentially maintenance-free — when a reading looks suspicious, pull a remote snapshot from the 5-megapixel camera first and dispatch only when confirmed.

Radar carries a higher unit price than float or pressure devices, but once stilling-well civils, periodic calibration and service trips are counted over the lifecycle, non-contact usually wins for medium-to-large monitoring networks in sewage, irrigation and flood control. All three families feed EC32/EC60 RTUs over 4G/NB-IoT, so platform-side changes during replacement are minimal. For new sites without existing stilling wells, we recommend going straight to the vision-fusion radar level meter.

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