The Water Linked - DVL A50 and the DVL A125 – The world’s smallest DVL's
 
 
 
 
 
 
 
 
The Water Linked A50 is the world’s smallest Doppler Velocity Log (DVL). By utilising the latest technology Water Linked have been able to reduce the size and cost of the DVL, while delivering a level of performance previously not possible in a product so small.

When size matters
 
Thanks to the size and weight of the A50, the smallest ROVs and AUVs can now benefit from increased navigation and control. This allows these small vehicles operating in water depths down to 600m to perform tasks that would have previously required a larger and more expensive vehicle.

Although a clear benefit for small vehicles, larger vehicles requiring high accuracy navigation features also benefit from the size, weight, and cost benefits of fitting this high accuracy DVL.

While typically integrated fully to the ROV or AUV for enhanced control, the integrated Attitude and Heading Reference System (AHRS) within the A50 allows the DVL to be used for dead reckoning positioning. This feature allows the A50 to generate an accurate track plot of the vehicles movements without the need to fully integrate with the vehicle control system.
 
Key features

• 5cm – 50m altitude range 300m or 600m depth rated

• Ethernet and Serial interface

• Imbedded computer for standalone operation

• AHRS for increased accuracy

• Extremely small size enabling easy mounting and integration​ 

• Web GUI with comprehensive diagnostic features

Acoustic

• Transducer frequency: 1 MHz

• Transducer setup: 4-beam convex Janus array

• Transducer beam angle: 22.5 degrees

• Ping rate: 4 - 15 Hz (adaptive to altitude)

• Sensor assist: Integrated AHRS

• Min altitude: 5 cm

• Max altitude: 50 meters (>35 m is dependent on seabed conditions, salinity levels etc.)

• Max velocity: 3.75 m/s

• Velocity resolution 0.1 mm/s

• Long term accuracy ±1.01 % (Standard version), ±0.1 % (Performance version)

 
Electrical

• Input voltage 10 - 30 Vdc

• Average power 4 W

• Peak power 35 W

• Physical interface 3m cable with interface module, 8 wires, (Power / Ethernet / Serial)

• Indicator Status LED (Power, Lock)

• Communication Ethernet & Serial (UART 115200 baud)

• Protocols Water Linked API and PD6

Mechanical
 

• Diameter 66 mm

• Height 25 mm

• Weight in air 0.17 kg

• Weight in water 0.105 kg

• Depth rating 300m or 600m

• Material PEEK (housing), Stainless Steel 316 (back plate)

• Operating temperature -5 to 55 °C 

Approvals 
 

• CE

 

 

Groundbreaking performance-to-size ratio
 
 
 
 
 
 
 

The Water Linked A125 is capable of maintaining bottom lock at speeds of up to 9 meters per second, and with a maximum altitude of 125m, the A125 is the perfect DVL for ROVs, USVs and AUVs. The ability to also operate at an altitude as low as 5cm means the DVL will work at extremely short range as well as long range.

While the size and weight of the A125 allows this DVL to be used on the smallest of vehicles, having a depth rating of 3000m means this high performance DVL can also be used on vehicles that operate at these extreme depths.

Although a DVL is typically integrated fully to the vehicle for enhanced control, the integrated Attitude and Heading Reference System (AHRS) within the A125 allows the DVL to be used for dead reckoning positioning. This feature allows the A125 to generate an accurate track plot of the vehicles movements without the need to fully integrate with the vehicle control system.
 
Key features

• 5 cm – 125 m altitude range

• 600 m or 3000 m depth rated

• Ethernet and Serial interface

• Imbedded computer for standalone operation

• AHRS for increased accuracy

• Extremely small size enabling easy mounting and integration

• Web GUI with comprehensive diagnostic features

Acoustic

• Transducer frequency: 420 kHz

• Transducer setup: 4-beam convex Janus array

• Transducer beam angle: 22.5 degrees

• Ping rate: 4 - 15 Hz (adaptive to altitude)

• Sensor assist: Integrated AHRS

• Min altitude: 5 cm

• Max altitude: 125 meters (>110 m is dependent on seabed conditions, salinity levels etc.)

• Max velocity: 9 m/s

• Velocity resolution 0.1 mm/s

• Long term accuracy ±1.01 % (Standard version), ±0.1 % (Performance version)

 
Electrical

• Input voltage 10 - 30 Vdc

• Power Consumption: 3 W

• Power-on current surge: 15 W

• Physical interface 3m cable with interface module, 8 wires, (Power / Ethernet / Serial)

• Indicator Status LED (Power, Lock)

• Communication Ethernet & Serial (UART 115200 baud)

• Protocols Water Linked API and PD6

Mechanical
 

• Diameter 125 mm

• Height 30 mm

• Weight in air 0.75 kg

• Weight in water 0.5 kg

• Depth rating 600 meters or 3000 meters

• Material PEEK (housing), Stainless Steel 316 (back plate)

• Operating temperature -5 to 55 °C 

Approvals 
 

• CE

 
For more in depth information on operation and installation, check out our DVL Guide, just click the button below: