SBE 61 Deep Argo CTD

The SBE 61 Deep Argo CTD is an evolution of the SBE41/41CP Argo CTD designed for deployments to 7000 m, with improved overall measurement quality and stability to meet the needs of deep ocean research. Each SBE 61 is chosen from an extended calibration history, ensuring stable electronics and minimal drift in the field. The hardware interface and many commands have been carried over to make integration into existing SBE 41/41CP-based products easier.

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Key Features Specifications Resources Content

Key Features

Proven SBE 41 CTD Temperature, Conductivity, and Pressure sensors with improved electronics provide stability for multi-year deployments
Shielded conductivity electronics backfilled with dry gas for improved stability
Long-term factory calibration in our state-of-the-art facility ensures higher accuracy with minimal drift
Pump-controlled TC-Ducted flow over the temperature and conductivity sensor minimizes salinity spiking
U-shaped flow path prevents ingesion of surface contaminants
Carefully engineered anti-foul protection extends deployment duration
RS-232 communications

Parameters Measured

Specifications

Specification	Value
Communication Options	RS-232
Depth Rating (Meters)	7000m
Power Source	External
Housing Material Options	Titanium
Onboard Memory	Yes
Connector	MCBH
Sampling Rate	4 scans/sec., nominal
Power Consumption	Idle: 10 mA; Sleep: 10 uA; Profiling: 20 mA Sleep: 15 μA Profiling: 21 mA (41CP only)
Accuracy	Conductivity: 0.0002 S/m; Temperature: 0.001°C; Pressure: 4.5 dbar / 7000 m Conductivity ± 0.0003 S/m (±0.003 mS/cm) Temperature ± 0.002 °C Pressure ± 2 dbar‡
Resolution	Conductivity: 0.00005 S/m; Temperature: 0.0001°C; Pressure: 0.002% of full scale range Conductivity ± 0.0003 S/m (±0.003 mS/cm) Temperature ± 0.002 °C Pressure ± 2 dbar‡
Biofouling Protection	Yes