CTDs: Moored

Moored

Moored sensors measure water parameters in one location over an extended period. These instruments are often battery-powered and save banks of data in their internal memory for later retrieval. Moored CTDs and sensors form the backbone of long-term studies on buoys, docks, and other fixed platforms, providing valuable time-series of data for monitoring and research applications.

Sea-Bird Scientific offers CTDs, sensors, and multiparameter instruments specifically designed for use on Moorings.

CTDs

SBE 16plus V2 SeaCAT C-T measures Conductivity, Temperature, (optional) Pressure,and up to seven auxiliary sensors, at user-programmable intervals. Also, available with Inductive Modem (IM) telemetry.
SBE 37 MicroCAT C-T (P) (DO) Recorder measures Conductivity, Temperature,(optional) Pressure, and (optional) Dissolved Oxygen measurements, at user programmable intervals. Available with RS-232, RS-485, SDI-12, and Inductive Modem interfaces.

Sensors

SBE 39plus Temperature (P) Recorder measures Temperature and (optional) Pressure, at user-programmable intervals. Internal memory and battery pack, RS232 and USB interface. Configurations with internal or external thermistor, external connector, pressure. Also, available with Inductive Modem (IM) telemetry.
SBE 56 Temperature Logger: Low-cost, high-accuracy, battery-powered temperature and time logger, with user-programmable sampling interval.

Multiparameter Instruments

HydroCAT-EP measures conductivity, temperature, depth, dissolved oxygen,pH, turbidity, and chlorophyll in a fully integrated package. It is ideally suited for extended deployments in remote, biologically rich environments, for depths to 350m.

Case Studies

Real-Time Data from NOAA PMEL Ocean Climate Station Moorings

Site of the Kuroshio Extension Observatory(KEO) mooring in the Western Pacific

On September 19th 2009, the center of Typhoon Choi-Wan passed 40 km to the southeast of the Kuroshio Extension Observatory (KEO) mooring. With Sea-Bird Scientific’s Inductive Modem system (IM) as the backbone of the KEO oceanographic monitoring system, a suite of over 20 subsurface instruments captured the upper-ocean response to strong atmospheric forcing in real-time.

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Long-Term Water Quality Monitoring Deployments with the Sea-Bird HydroCAT-EP

Hourly values of dissolved oxygen in Shilshole Bay measured with a HydroCAT-EP (blue dots), an SBE 37 MicroCAT (green dots), and an SBE 43 deployed on an SBE 19plus V2 SeaCAT CTD (red circles)

The Sea-Bird Scientific HydroCAT-EP measures typical CTD parameters along with dissolved oxygen, pH, turbidity, and chlorophyll in a single, robust package. Designed for extended deployments in coastal environments, our science team rigorously vetted the instrument in an estuarine environment to ensure blue-ocean data quality in a high-fouling location.

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Moored CTD Selection Guide

16plusV2	T, C, P* 6 Analog Sensor Ports 2 RS-232 Sensor Ports	RS-232	Internal memory and batteries Real-time output Capable of supporting multiple auxiliary sensors Bio-fouling protection Depths to 600m, 7000m, and 10500m Next generation of the SeaCAT family, field-proven since 1987
16plus-IM V2	T, C, P* 6 Analog Sensor Ports 2 RS-232 Sensor Ports	Inductive Modem RS-232 (Internal Only)		Internal memory and batteries Real-time output Capable of supporting multiple auxiliary sensors Bio-fouling protection Depths to 600m, 7000m, and 10500m Next generation of the SeaCAT family, field-proven since 1987
19plusV2	T, C, P* 6 Analog Sensor Ports 2 RS-232 Sensor Ports	RS-232	Capable of Moored or Profiling deployments: Emulates the 16plusV2 when configured in Moored Mode

37-SM	T, C, P*	RS-232 RS-485	Internal memory and batteries Real-time RS-232 output Integrated pump (SMP and SMP-ODO only) Depths to 350m and 7000m Bio-fouling protection Field-proven MicroCAT family, with more than 10,000 instruments deployed
37-SMP	T, C, P*	RS-232 RS-485 SDI-12		Internal memory and batteries Real-time RS-232 output Integrated pump Depths to 350m and 7000m Bio-fouling protection Field-proven MicroCAT family, with more than 10,000 instruments deployed
37-SMP-ODO	T, C, P*, DO	RS-232 RS-485 SDI-12		RS-232 RS-485 SDI-12	Internal memory and batteries Real-time RS-232 output Depths to 350m and 7000m Bio-fouling protection Field-proven MicroCAT family, with more than 10,000 instruments deployed
37-SI	T, C, P*	RS-232 RS-485	Internal memory and batteries Real-time RS-232 output Depths to 350m and 7000m Bio-fouling protection
37-SIP	T, C, P*	RS-232 RS-485		RS-232 RS-485 SDI-12	Internal memory and batteries Real-time RS-232 output Integrated pump Depths to 350m and 7000m Bio-fouling protection
37-IM	T, C, P*	Inductive Modem RS-232 (Internal Only)	Internal memory and batteries Integrated Inductive Modem Real-time inductive modem output Depths up to 7000 meters Bio-fouling protection
37-IMP	T, C, P*		Inductive Modem RS-232 (Internal Only)	Internal memory and batteries Integrated Inductive Modem Real-time inductive modem output Integrated pump Depths up to 7000 meters Bio-fouling protection
37-IMP-ODO	T, C, P*, DO		Inductive Modem RS-232 (Internal Only)		Internal memory and batteries Integrated Inductive Modem Real-time inductive modem output Integrated pump Depths up to 7000 meters Bio-fouling protection

HydroCAT-EP	T, C, P, DO, pH Fluorescence* / Turbidity*	RS-232 SDI-12	Measures conductivity, temperature, depth, dissolved oxygen, pH, turbidity, and chlorophyll. Ideally suited for extended deployments in remote, biologically rich environments, for depths to 350 m.
HydroCAT	T, C, P, DO Fluorescence / Turbidity*	RS-232 SDI-12	Slim form-factor (Compare to the 37-SMP-ODO)
39plus	T, P*	RS-232 USB (Internal Only)	High-accuracy, fast-sampling temperature sensor Internal memory and batteries Real-time RS-232 output Internal USB interface Depths to 600m and 10,500m
39plus-IM	T, P*	Inductive Modem Internal RS-232 and USB		High-accuracy, fast-sampling temperature sensor Internal memory and batteries Real-time RS-232 output Internal USB interface Depths to 600m and 10,500m
56	T	USB (Internal Only)	Low-cost, high-accuracy, fast-sampling temperature recorder with compact form factor.

Sensor	Memory	Estimated Total Samples	Plastic Weight	Titanium Weight
16plusV2	64 Mb	140,000 - 355,000 samples (battery limited)	7.3 kg	13.7 kg
16plus-IM V2	64 Mb	110,000 - 290,000 samples (battery limited)	9.0 kg	17.0 kg
19plusV2	64 Mb	140,000 - 355,000 samples (battery limited)	7.3 kg	13.7 kg
37-SM	8 Mb	530,000 (memory limited)	2.7 kg	3.8 kg
37-SMP	8 Mb	425,000 (battery limited)	3.4 kg	3.7 kg
37-SMP-ODO	8 Mb	25,000 (battery limited)	3.4 kg	4.2 kg
37-SI	8 Mb	530,000 samples (memory limited - no batteries)	2.2 kg	2.9 kg
37-SIP	8 Mb	530,000 samples (memory limited - no batteries)	2.3 kg	3.0 kg
37-IM	8 Mb	530,000 samples (memory limited)	2.9 kg	4.0 kg
37-IMP	8 Mb	380,000 samples (battery limited)	3.6 kg	1.7 kg
37-IMP-ODO	8 Mb	24,000 samples (battery limited)	3.7 kg	4.4 kg
HydroCAT-EP	16 Mb	Varies - recommended 3 month maximum deployment	4.1 kg	N/A
HydroCAT	8 Mb	25,000 (battery limited)	3.0 kg	N/A
39plus	64 Mb	5.5 million samples (T only) 9.5 million samples (T and P)	0.6 kg	1.2 kg
39plus-IM	64 Mb	9.5 million samples (T and time only) 5.5 million samples (T, P, and time)	1.1 kg	1.6 kg
56	15.9 million samples	5.3 million samples at 0.5-sec intervals (31 days) 4.1 million samples at 15-sec intervals (717 days)	0.2 kg	N/A
WQM and WQMx	1 Gb	Varies	5.4 kg	N/A