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RQ-30 latest generation RADAR for non-contact discharge measurement

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The RQ-30 system enables the continual measurement of flow velocity and level and automatically calculates the discharge of any natural or semi-natural river or stream by RADAR


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The RQ-30 non-contact system measures the discharge by RADAR technology. The unique feature of the RQ-30 system is the continuous capturing of flow velocity which enables an exact discharge measurement and evaluation of specific discharge situations. In case of flood the system measures the exact discharge and because of the non-contact radar technology there is no damage of the measurement system by bed loads or trees. If the floodplains get flooded the discharge is determined by combining several RQ-30 sensors to one system. The RQ-30 system measures from very low water depth up to the maximum possible discharge of a 100-year flood or even greater. To measure any discharge situation at rivers, torrents, creeks, mountain torrents or open channels the RQ-30 is a unique and reliable system.

  • RQ-30 discharge sensor: Measures the flow velocity, integration of radar level sensor and calculation of the discharge
  • Radar level sensor
  • Protective casing for both sensors

Example of use



Hydroelectric power plant „Kaprun“, Austria: Preservation of evidence of the discharge quantity in power plant operations




Creek "Annabach", Graz,  Austria: Monitoring of storm-water overflow in the canal from the creek "Annabach"


Technical Data

Measuring element/-principle flow velocity:

Radar / Doppler Shift

Measuring element/-principle water level:

Radar / delay time

Measuring range flow velocity:

0.15 - 15 m/s


1 mm/s

Measuring range water level:

0 - 15 m; Resolution: 1mm

Field of application:

-35 - + 60 °C


RS-485 and SDI12


5,5 - 30 V DC

Power consumption:

max. 130 mA / per measurement

Protection type:

IP 68


powder-coated aluminium / 3,5kg


281mm x 396mm x 151mm (LxHxW)


bracket for pipe Ø 34 - 48 mm




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