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SBE 41 CTD Module for Autonomous Profiling Floats
The Sea-Bird SBE 41/41CP Argo CTD module was developed in response to the scientific need for highly stable and accurate temperature and salinity on profiling floats. The standard CTD for Argo floats, the SBE 41/41CP have helped provide an unprecedented amount of data since the creation of the Argo program. As the global distribution of profiling floats expands and more floats enter the water, Sea-Bird has built upon the capabilities of the 41/41CP. Today, float CTDs can house new and improved sensors with flexible integration options for various float platforms.
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Key Features
- Shipped fully calibrated, with demonstrated excellent long-term stability, eliminating the need for post-deployment tampering of the calibration to force agreement with the local TS.
- Carefully engineered antifouling protection, with antifouling devices, a U-shaped flow path, and a pump.
- Proven TC-ducted flow over the temperature sensor and into the conductivity sensor. Salinity spiking is minimized because the TC-duct and pump precisely coordinate the T and C responses.
- Premium strain-gauge pressure sensor has thermistor correction for ambient temperature effects. Designed for long term deployments Data Quality Standard Float CTD
Parameters Measured
Specifications
| Specification | Value |
|---|---|
| Depth Rating (Meters) | 2000m |
| Power Source | External |
| Housing Material Options | Aluminum |
| Onboard Memory | Yes |
| Sampling Rate | 4 scans/sec., nominal |
| Memory Capacity (Samples) | 8 - 14 VDC |
| Power Consumption | Idle: 3.3 mA; Sleep: 15 uA; Profiling: 21 mA Sleep: 15 μA Profiling: 21 mA (41CP only) |
| Accuracy | Practical Salinity ± 0.0035 PSU; Conductivity: 0.0003 S/m; Temperature: 0.002 °C; Pressure: 2 dbar Conductivity ± 0.0003 S/m (±0.003 mS/cm) Temperature ± 0.002 °C Pressure ± 2 dbar‡ |
| Resolution | Conductivity: 0.00001 S/m; Temperature: 0.0001 °C; Pressure: 0.04 dbar |
| Biofouling Protection | Yes |
Content
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Accessories
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