Sea-Bird Scientific | Auxiliary Sensors

Auxiliary Sensors

Auxiliary Sensor Solutions

Sea-Bird Scientific’s auxiliary sensors extend the capabilities of your CTD systems for ocean and freshwater research. From turbidity and fluorescence to altimeters and radiometers, these add-ons integrate seamlessly with our instruments and software for accurate, defensible data. Designed for harsh environments and backed by calibration and expert support, our sensors help you capture critical parameters and advance science. Partner with us to customize solutions for your mission.

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HydroCAT-EP V2 Multiparameter CTD sensor

Sensor	Accuracy	Resolution	Depth Rating	Sampling Rate
SBE 4 Conductivity Sensor	0.0003 S/m	0.00004 S/m at 24 samples/sec	6800 m, 10500 m	60 msec
SBE 18 pH Sensor	± 0.1 pH		1200 m	1 sec
Deep SUNA Nitrate Sensor	± 2 uM (±0.028 mg/l-N) or ± 10% of reading	Not specified	2000 m	1 Hz (1 sample/sec)
ECO-PAR™	Calibration accuracy: ±5% NIST traceable in air	14 bit	300 m	User-selectable to 8 Hz
SBE 39plus Temperature Recorder	Temperature ± 0.002 °C (-5 to +35 °C); ± 0.01 °C (+35 to +45 °C) Optional Pressure ± 0.1% of full scale range	Temperature 0.0001 °C Optional Pressure 0.002% of full scale range	600 m	Up to 2 Hz (2 samples/sec)
SBE 38 Digital Oceanographic Thermometer	± 0.001 °C (1 mK)	0.00025 °C (0.25 mK)	10500 m	500 msec
SBE 63 Optical Dissolved Oxygen Sensor	Larger of ± 3 µmol/kg (equivalent to 0.07 ml/L or 0.1 mg/L) or ± 2%	0.2 µmol/kg	600 m, 7000 m	1 Hz (1 sample/sec)
SUNA V2	Dependent on path length and concentration range	Not specified	500 m, 100 m	1 Hz (1 sample/sec)
SBE 43 Dissolved Oxygen Sensor	± 2% of saturation		600 m, 7000 m
SBE 5 Submersible Pump			600 m, 10500 m

Discover our most trusted oceanographic and freshwater instruments, designed for accuracy and durability. Explore top-performing models that meet diverse research and monitoring needs worldwide.

SBE 25plus Sealogger CTD

The SBE 25plus Sealogger is the ideal research-quality CTD profiler for coastal, estuarine, and...

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SBE 37 MicroCAT

The SBE 37 MicroCAT is a high-accuracy conductivity and temperature (pressure optional) recorder...

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SBE 39plus Temperature Recorder

The SBE 39plus is a high-accuracy, fast-sampling temperature (pressure optional) recorder with USB...

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Auxiliary Sensors

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