.svg)
Auxiliary Sensor Solutions
Auxiliary Sensors
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.
Model Matrix
| 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 | 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 | 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 |
SBE 4 Conductivity Sensor
Accuracy: 0.0003 S/m
Resolution: 0.00004 S/m at 24 samples/sec
Sampling Rate: 60 msec
Depth Rating: [6800 m, 10500 m]
SBE 18 pH Sensor
Accuracy: ± 0.1 pH
Resolution:
Sampling Rate: 1 sec
Depth Rating: [1200 m]
Deep SUNA Nitrate Sensor
Accuracy: ± 2 uM (±0.028 mg/l-N) or ± 10% of reading
Resolution:
Sampling Rate: 1 Hz (1 sample/sec)
Depth Rating: [2000 m]
ECO-PAR™
Accuracy: Calibration accuracy: ±5% NIST traceable in air
Resolution: 14 bit
Sampling Rate: User-selectable to 8 Hz
Depth Rating: [300 m]
SBE 39plus Temperature Recorder
Accuracy: Temperature ± 0.002 °C (-5 to +35 °C); ± 0.01 °C (+35 to +45 °C)
Optional Pressure ± 0.1% of full scale range
Resolution: Temperature 0.0001 °C
Optional Pressure 0.002% of full scale range
Sampling Rate: Up to 2 Hz (2 samples/sec)
Depth Rating: [600 m]
SBE 38 Digital Oceanographic Thermometer
Accuracy: ± 0.001 °C (1 mK)
Resolution: 0.00025 °C (0.25 mK)
Sampling Rate: 500 msec
Depth Rating: [10500 m]
SBE 63 Optical Dissolved Oxygen Sensor
Accuracy: Larger of ± 3 µmol/kg (equivalent to 0.07 ml/L or 0.1 mg/L) or ± 2%
Resolution: 0.2 µmol/kg
Sampling Rate: 1 Hz (1 sample/sec)
Depth Rating: [600 m, 7000 m]
SUNA V2
Accuracy: Dependent on path length and concentration range
Resolution:
Sampling Rate: 1 Hz (1 sample/sec)
Depth Rating: [500 m, 100 m]
SBE 43 Dissolved Oxygen Sensor
Accuracy: ± 2% of saturation
Resolution:
Sampling Rate:
Depth Rating: [600 m, 7000 m]
SBE 5 Submersible Pump
Accuracy:
Resolution:
Sampling Rate:
Depth Rating: [600 m, 10500 m]
Our Solutions
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...
SBE 37 MicroCAT
The SBE 37 MicroCAT is a high-accuracy conductivity and temperature (pressure optional) recorder...
SBE 39plus Temperature Recorder
The SBE 39plus is a high-accuracy, fast-sampling temperature (pressure optional) recorder with USB...
Get in touch
Contact our team
Ready to take the next step? Connect with Sea-Bird Scientific’s team for personalized guidance, support, or to request a quote for our solutions.