RG-30a Non-Contact Surface Velocity Sensor

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The flow velocity sensor is designed for non-contact measurement of the surface flow velocity of bodies of water. Radar signals reflected by the moving surface of the water are used to determine the flow velocity of the irradiated surface.

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Physical and environmental

Power supply

6...30 VDC; Reverse voltage protection, overvoltage protection

Power consumption at 12VDC

Active measurement approx. 110 mA

Outputs

RS-485 ASCII / Modbus RTU SDI-12

Operating temperature

-40…60 °C (-40…140 °F)

Storage temperature

-40…60 °C (-40…140 °F)

Relative humidity

0...100 %

Protection rating

IP 67

Lightning protection

Integrated protection against indirect lightning with a discharge capacity of 0,6 kW Ppp

Housing material

Powder coated aluminum, vandalism-proof
 

Physical and environmental

Mounting bracket

 Ø34…48 mm

Size

L x W x H241 x 154 x 246 mm (9.49 x 6.06 x 9.69 in)

  

Weight

2.7 kg (5.95 lb)
 

Velocity

Detectable measurement range

0.08…16 m/s (depending on waves)

Accuracy

± 0.01 m/s (certified by METAS)

Resolution

1 mm/s

Direction recognition

+/-

Measurement duration

5…240 s

Measurement interval

8 s…5 h

Measurement frequency

24 GHz (K-Band)

Radar opening angle

12°

Distance to water surface

0.50...130 m

Vertical inclination

Measured internally
 

Automatic vertical angle compensation

Accuracy

± 1 °

Resolution

± 0.1°

The RG-30a flow velocity sensor is designed for non-contact measurement of the surface flow velocity of bodies of water. Radar signals reflected by the moving surface of the water are used to determine the flow velocity of the irradiated surface. Compact construction and a non-contact measurement principle enable simple installation and use. 

Application areas include open channels, flumes and enclosed drains. The RG-30 is especially suitable for measuring tasks where the use of conventional measuring systems is problematic, e.g. in the event of flooding.    

This sensor is impressive thanks to its low energy consumption and high operational dependability. It allows continuous recording of flow velocity and, by approximation, discharge. 

The RG-30 set up and parameters are assigned simply and conveniently by using a PC or laptop via our Commander terminal program. 

  • Non-contact, maintenance-free
  • No structural constructions in the water needed
  • Simple integration into existing system
  • Remains operational in flooding situations
  • Low power, optionally solar powered
  • Detection of flow direction
  • Measurement range from +/- 0.10 to +/- 15 m/s (depending on flow conditions)
  • Near blanking zone 0.5 m
  • Set measurement frequency or external trigger
  • Independent of environmental infl uences