RSS-2-300W-Series

RSS-2-300W Surface Flow Velocity Meter

Name: RSS-2-300W Surface Flow Velocity Meter
SKU: RSS-2-300W-Series

The Geolux RSS-2-300W is a highly sensitive Doppler radar sensor designed for the contactless measurement of surface flow velocity. Operating in the K-band (24.075 GHz to 24.175 GHz), the instrument leverages the Doppler effect to accurately measure the velocity of river flow at the surface. Due to its contactless operation, the RSS-2-300W offers quick and easy installation above the water surface, minimizing the need for maintenance.

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Features

Contactless surface velocity measurement. The instrument reports flow speed and flow direction, and can detect flow reversal.
Accuracy validated by top laboratories worldwide.
RS-232, RS-485 Modbus, and analog 4-20 mA interfaces included.
Remote configuration of all instrument parameters.
Robust, small-sized IP68 aluminum or stainless steel enclosure.

Description

The instrument provides highly accurate flow velocity readings 10 times per second, which are transmitted via RS-232, RS-485 Modbus, and analog 4-20 mA outputs, ensuring seamless integration with Geolux or third-party dataloggers. An integrated MEMS sensor offers automatic tilt angle compensation and built-in internal vibration monitoring and SNR calculation for assessing measurement quality. The instrument’s accuracy has been confirmed by multiple laboratories worldwide, including METAS (Switzerland), WATIC (China), KICT (Korea), Brodarski institut (Croatia), and Central Water and Power Research Station (India).

The instrument is designed for continuous non-contact surface flow monitoring in hydrological networks according to WMO-No. 168.

Specifications

Parameter	RSS-2-300W	RSS-2-300W-SS
Measurement Range	0.02 to 15.0 m/s	0.02 to 15.0 m/s
Application Hydrology and Flood Monitoring	x	-
Application Wastewater and Industrial Monitoring	-	x
Application Irrigation Monitoring	x	x
Application Snow Monitoring	-	-
Application Coastal and Ocean Monitoring	-	-
Application Meteorology	x	x
Antenna Beam Angle	12° / 24°	12° / 24°
Accuracy	±1% of the measured value	±1% of the measured value
Blind Zone	0.2 m	0.2 m
Frequency Range	24 GHz K-band	24 GHz K-band
Radar Type	Doppler	Doppler
Mounting	With Brackets Accessory to vertical pole (Φ25 to Φ60 mm)	With Brackets Accessory to vertical pole (Φ25 to Φ60 mm)
Sampling Rate	10 Hz	10 Hz
Serial Protocols	RS-232 RS-485 / Modbus-RTU SDI-12	RS-232 RS-485 / Modbus-RTU SDI-12
Analog Interface	4-20 mA, live-zero signalling	4-20 mA, live-zero signalling
Connector Type	M12 circular 12-pin	M12 circular 12-pin
Cable	10 m cable included	10 m cable included
Input Voltage	9 to 29 VDC	9 to 29 VDC
Power Consumption	0.950 W – operating mode 0.085 W – standby mode	0.950 W – operating mode 0.085 W – standby mode
Maximal Current	< 250 mA	< 250 mA
Operating Temperature Range	-40°C to +85°C	-40°C to +85°C
Operating Relative Humidity Range	0 - 99% non-condensing	0 - 99 % non-condensing
Enclosure Material	Non-corrosive anodized aluminium	Stainless steel
Enclosure Dimensions	110 mm x 90 mm x 50 mm	110 mm x 90 mm x 50 mm
Enclosure Protection Class	IP68	IP68
Weight (without cable)	450 g	1200 g
Resolution	0.001 m/s	0.001 m/s
Maximal Installation Height Above Water	25 m	25 m
Maximal Beam Distance to Water	50 m	50 m
Radar Output Power	20 dBm EIRP	20 dBm EIRP

Galeria

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