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RSS-2-300WL Flow Meter

Product Highlights

  • Contactless flow measurement and surface velocity measurement

  • Integrated discharge (flow) calculation

  • RS-232, RS-485 Modbus, SDI-12, analog 4-20 mA interfaces in all models

  • Remote configuration of all instrument parameters through any digital communication interface

  • Robust IP68 aluminum or stainless steel enclosure



  • Early flood warning

  • Monitoring of flow and irrigation channels

  • Accurate discharge monitoring in rivers

  • Flow tracking in salt and copper mine channels

  • Sewage and waste water discharge measurement


Product Description

The Geolux RSS-2-300WL has an integrated radar surface velocity and level meter for contactless measurements of surface flow velocity and water level. Contactless radar technology enables quick and simple sensor installation above the water surface with minimum maintenance. Calculation of the total flow discharge is internally implemented within the instrument by combining surface velocity measurement, water level measurement, and a configured cross-section of the river or channel. Defining the measurement parameters such as profile cross-section, material of the edges, location of the sensor above the water, and all other instrument settings can be easily set with the Geolux configuration application using any available communication interface.

Detailed Specifications

General specifications

Detection Distance                      15 m / 30 m

Speed Range                                0.02 m/s to 15 m/s

Speed Resolution                         0.001 m/s

Speed Accuracy                           1%

Level Resolution                           0.5 mm

Level Accuracy                             +/-2 mm

IP Rating                                       IP68

Electrical & Mechanical

Input Voltage                    9 to 27 VDC

Power Consumption        1,3 W operational; 0,235 W standby

Maximal Current              < 750 mA

Temperature Range         -40 °C to +85 °C (without heating or coolers) 

Enclosure Dimensions     150mm x 200mm x 250mm

Mechanical Drawing


Serial Interface                     1 x serial RS-485 half-duplex
                                              1 x serial RS-232 (two wire interface)

Baud Rate                             9600 bps to 115200 bps

Serial Protocols                     GLX-NMEA Modbus

Other Protocols                     SDI-12

Analog Output                      4-20 mA, programmable velocity, level
                                               or flow


EN 61326-1:2013
ETSI EN 301 489-1
ETSI EN 301 489-3

EN 301 489-3 V2.1.1:2019
EN 301 489-1 V2.2.3:2019

EN 300 440 V2.2.1:2018
EN 62368-1:2014+A11:2007;
EN 60950-22:2017
EN 61010-1:2010

FCC Part 15 class B


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