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 pro- 

tection, overvoltage protection 

Power consumption at12VDC                                  

Active measurement approx. 110 

mA 

Outputs 

RS-485 ASCII / Modbus RTU SDI-12 

Operating tem- 

perature 

-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 indir- ect 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 dur- 

ation 

5…240 s 

Measurement interval 

8 s…5 h 

Measurement fre- 

quency 

24 GHz (K-Band) 

Radar opening angle 

12° 

Distance to water sur- 

face 

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