NBOSI Ocean Sensors

NBOSI is a leading developer of compact and rugged CTD (conductivity, temperature and depth) sensors. The company’s products are ideal for a wide range of marine platforms, including AUVs and ROVs, crewed and uncrewed surface vessels, and underwater gliders.

NBOSI Sensing Technology

NBOSI’s state-of-the-art sensors are based around a four-electrode conductivity cell design that features an integrated pressure-resistant thermistor and self-referencing electronics. Unlike traditional two-electrode cell designs, they do not require noisy and power-hungry pumps. They also differ from inductive cell technologies, featuring the ability to be mounted anywhere on the vehicle exterior without compromising either data quality or hydrodynamic efficiency.

All sensors are fully potted and tested, and can withstand pressures of over 6000 dbar. The company can customize products to meet specific requirements, and regularly provide enhanced versions that can operate at up to 6750 dbar (9800 psi).

NBOSI products have been proven under real-world ocean conditions on a wide range of leading platforms, including:

• HII REMUS 100, 300 & 600 UUVs
• L3/OceanServer Iver2 AUV
• Liquid Robotics Wave Glider USV
• Teledyne Webb Research Slocum Glider
• Woods Hole Oceanographic Institution Sentry AUV

500 Series CTD Sensors

The NBOSI 500 Series CTD sensors combine compact, rugged construction with precision electronics to deliver real-time, research-quality conductivity, temperature, and depth measurements. The streamlined design supports straightforward integration and maintenance across a range of subsea platforms.

Each sensor is supplied with either a permanently attached cable pigtail or a bulkhead connector, depending on user requirements. An optional integrated Keller PA7LD pressure sensor, available in 30, 100, or 200 bar ranges, enables additional outputs including real-time ocean density and sound speed.

View NBOSI CTD configurations >

100 Series CT

Conductivity & temperature sensors in a variety of form factors

The 100 Series CT sensors feature an externally mounted CT cell and internally mounted precision electronics, and were produced in both rectangular and cylindrical form factors. These legacy designs have now been replaced by the dimensionally identical 501 and 503 models in the 500 Series, which integrate electronics within a single compact unit.

For CT-only applications such as ASV deployments, a 500 Series sensor without a pressure sensor provides a simpler, lower-cost solution with improved performance. NBOSI continues to service and repair the more than 1,000 Series 100 sensors deployed worldwide.

More information: 100 Series Conductivity & Temperature Sensors

Calibration Services

NBOSI provides professional and cost-effective expert temperature and salinity calibration services that ensure that your sensors remain at peak performance, with a rapid turnaround for minimal downtime. In addition, the company also offers pressure validation testing and sensor calibration up to 10,000 psi (6895 dbar).

To find out more about how NBOSI can help keep your sensors operating at their maximum capabilities, please get in touch.