Specifications
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Sensor Details
GRD-900 Radar Water Level & Velocity Sensor Module (Non-Contact)
GRD-900 radar water level is a 24 GHz non-contact radar sensor for water level distance + surface velocity. IP68, RS-485 Modbus/RTU. Ideal for AWLR and flood early warning.
Notes
Radar Water Level – With 24 GHz radar technology, the GRD-900 measures distance (water level) and surface velocity at the same time, helping you build dependable AWLR systems, flood early warning networks, and long-term hydrology monitoring setups.
What is GRD-900?
GRD-900 is an industrial-grade radar sensor module that monitors:
- Water level distance (distance to the water surface)
- Surface flow velocity (using Doppler radar)
Because it’s non-contact, it does not touch the water—so it keeps working even when the water carries floating debris or the environment accelerates fouling.
Key benefits
- Non-contact design helps reduce maintenance and improves long-term reliability
- Measures distance + velocity simultaneously using 24 GHz radar
- Resists common field issues like debris, sediment, and biofouling
- IP68 protection for harsh outdoor and flood-prone environments
- Flexible integration via RS-485 (Modbus/RTU) or RS-232
- Suitable for AWLR deployments and flood early warning stations
Key features / How it works
The GRD-900 combines microwave Doppler radar with distance-ranging principles:
1) A 24 GHz radar transmitter emits electromagnetic waves toward the water surface.
2) The reflected signal is processed:
- The phase shift component is used to determine distance (water level measurement).
- The Doppler frequency shift component is used to calculate surface flow velocity.
This measurement approach supports stable performance in fluctuating conditions and reduces wear-and-tear because there’s no submerged sensor part.
Use cases
GRD-900 fits monitoring scenarios such as:
- Flood early warning networks in rivers and flood-prone regions
- River monitoring stations for water surface elevation and velocity trends
- Canal and open-channel flow monitoring
- Hydrology monitoring projects that need long-term, low-maintenance sensing
FAQs
What does “non-contact” mean for a water level sensor?
It means the GRD-900 measures from above the water surface (over-channel mounting), so there’s no sensor element submerged in water.
Can the GRD-900 measure water level and velocity at the same time?
Yes. It uses 24 GHz radar distance-ranging for water level distance and Doppler processing for surface velocity.
What communication options are available?
RS-485 (Modbus/RTU) and RS-232 are supported for integration with RTU/PLC/data loggers.
Is GRD-900 suitable for flood early warning systems?
Yes. It’s designed for continuous monitoring in flood-prone regions and is commonly used in flood early warning networks and AWLR station designs.
How is the GRD-900 typically mounted?
Common mounting points include under bridges, beams, or channel-side structures, aiming the radar toward the water surface.
What makes radar sensors practical in dirty water environments?
Because measurement is non-contact, debris, sediment, and biofouling typically have less impact than sensors that touch the water.
If you need reliable water level and flow velocity data without constant maintenance, the GRD-900 Water Level & Velocity Sensor Module is built for exactly that.
It’s a radar-based, non-contact hydrological sensor designed for continuous monitoring in rivers, canals, open channels, and flood-prone locations—where debris, sediment, and biofouling usually cause trouble for contact-based sensors.
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