At RBR, we know the value of your underwater vehicle mission – every dive, glide, and profile counts. That’s why we’re proud to introduce the RBRlegato⁴ CTD: the next generation of conductivity-temperature-depth instrumentation designed specifically for gliders and autonomous underwater vehicles (AUVs). Building on the excellent capabilities of the RBRlegato³ CTD, this new version brings an increased depth rating, improved depth accuracy of ±0.01% full scale, and flexible multi-rate sampling capability.
Key highlights
- Rated to 1250dbar
- Depth accuracy now ±0.01% full scale
- Pump-free design with optimized flow dynamics
- Ultra-low power consumption
- Multi-rate sampling up to 16Hz
- Accurate conductivity to within 10cm of the air-ocean interface
- Unaffected by surface contaminants or freezing conditions
The RBRlegato⁴ CTD retains the same pump-free, inductive conductivity cell, eliminating moving parts and reducing both complexity and energy use. With the addition of multi-rate sampling across sensors – for example, sampling CTD at 16Hz but running power-hungry sensors at only 1Hz – the instrument consumes only 46mW of power when sampling. That’s 90% less power than traditional pumped CTDs, enabling you to extend mission durations or collect more data, faster, without compromising endurance.
Ready for multi-parameter missions
Modern ocean science rarely stops at salinity and temperature. The RBRlegato⁴ CTD integrates seamlessly with additional sensors — from dissolved oxygen and turbidity to PAR and fluorescence — enabling a single payload to deliver comprehensive, combined oceanographic datasets.
Precision when it matters most
Accuracy is the hallmark of a great CTD, and the RBRlegato⁴ CTD raises the standard:
- Conductivity: ±0.003 mS/cm initial accuracy with excellent year-on-year stability
- Temperature: ±0.002 °C, with optional fast thermistor response to further reduce lag and salinity spikes
- Pressure: ±0.01% full scale and rated to 1250dbar
Together, these advances ensure that critical salinity and density profiles remain accurate, even in rapidly changing conditions.
New depths
The RBRlegato⁴ CTD is more than an upgrade; it’s a leap forward in autonomous ocean measurement. With improved accuracy, multi-rate sampling, and leading low-power performance, it empowers your ocean vehicle to reach new depths – and deliver more science per mission.
Learn more about the RBRlegato⁴ CTD and how it can take your research to the next level at info@rbr-global.com or learn more here.
