MV-RD12T 80 GHz Radar Water Level Meter with PVDF Lens

The METRAVON MV-RD12T 80 GHz radar water level meter measures from above the water with a PVDF lens assembly. It is an option for pumping stations, open-water monitoring and other sites where a submerged probe is difficult to maintain. Its distance reading becomes a useful water-level measurement only after the mounting reference and controller calculation have been established.

Establish the water-level datum

Survey the antenna reference plane against a staff gauge or another stable site datum. If the reference plane is H above that datum and the measured vertical distance is d, water level above the datum is H minus d. Keep the sign and units consistent in the local display, RTU and monitoring platform.

Check the mounting position after bracket work or replacement. Reusing an old offset after moving the antenna introduces a level error even when the radar distance measurement is correct. Record the reference height and instrument settings together so maintenance personnel can restore the installation.

METRAVON MV-RD12T PVDF radar water level sensor with mounting bracket — Mount the MV-RD12T above the highest expected surface and retain access for checking the antenna face and cable seal.

MV-RD12T range, housing and power selection

Item	Product option	Site check
Radar frequency	80 GHz	Non-contact distance measurement through an unobstructed air path.
Antenna	42 mm PVDF lens assembly	Check compatibility with vapour, splashes and any cleaning chemicals.
Maximum range	Up to 50 m	Specify the required near limit and accuracy over the actual span; these depend on the version.
Process conditions	Atmospheric; -40 to 80 deg C	Not a pressure-vessel selection based solely on the water-level designation.
Enclosure protection	IP68 configuration	The supplied assembly and cable sealing must meet the agreed installation conditions.
Power and output	RS485 or analogue electronics options	Select the electrical version before calculating the power budget or specifying an RTU input.

The available electrical arrangements include 9-28 V DC with RS485/Modbus, 12-24 V DC with 4-20 mA plus RS485, and 24 V DC two-wire 4-20 mA/HART. A 3.6 V low-power option is also listed. These are ordering alternatives, not four interchangeable supplies for a single unit. Obtain the terminal diagram and operating-current requirements for the selected electronics.

Battery stations need more than a low-power label

For solar or battery-powered monitoring, specify how often the station must take and transmit a valid reading. Include instrument start-up, measurement and communication time in the duty cycle. A controller that removes power too early may record a default or stale value instead of a completed measurement.

Separate sensor consumption from the radio, cellular modem and RTU loads. Cable voltage drop and cold-weather battery performance also affect the voltage available at the instrument. Request the selected version's current profile before sizing storage; a single nominal current is insufficient for a duty-cycled station.

Operation in wet and turbulent locations

Place the beam away from falling water, dense foam, structural edges and pump discharge turbulence where possible. Inspect for persistent condensation or deposits on the antenna. IP68 describes enclosure protection under specified test conditions; it does not mean the radar can continue normal water-level measurement while the antenna is submerged.

If the required low-water distance exceeds the selected 80 GHz unit's range, compare the MV-RD12T-120G range configurations. The replacement still needs its own near-distance, power and communications checks.

Water monitoring questions

Q1. Why does the radar disagree with the staff gauge by a constant amount?

Check the reference height and datum first, then compare the raw distance. A constant offset can come from a mismatched zero point rather than a faulty distance sensor. Do not adjust the measurement simply to match a gauge until both references have been surveyed.

Q2. Is IP68 sufficient for a flood-prone installation?

The flood duration, depth, cable joints and enclosure variant still need review. Put electrical joints above the expected flood level where practical. Define how the station flags readings during inundation and how the mounting reference will be checked afterward.

Q3. What should an RTU integrator request?

Request the exact protocol revision, register definitions, scaling, invalid-reading codes and timing requirements. Test a known level and a communication failure at the RTU, not just with a configuration tool. Send these requirements with the supply voltage, measuring distances and mounting sketch when requesting a quotation.

80 GHz Radar Level Meters