Auxiliary Sensor Selection Guide

Descriptions and links on this page are provided as a convenient information source to our customers. Sea-Bird Electronics recommends products listed on this page, only to the extent that they are known to be of good quality, and are electronically, mechanically, and functionally compatible with Sea-Bird Electronics instruments and software (when used as suggested by Sea-Bird). Descriptions are current as of January 2013, but may be changed by the sensor manufacturer at any time.

For ordering Sea-Bird Scientific (WET Labs, Satlantic) and Third Party sensors from Sea-Bird, see Auxiliary Sensor Configuration.

The following types of sensors are compared below:

PAR sensors (light between 400 and 700 nm)

Manufacturer Model # Measurement
Type 1
Output
Type 2
Maximum
Depth
Comments
WET Labs ECO-PAR(S) Cosine Built-in log amplifier 300 m Bio-wiper to minimize fouling in
moored applications; MCBH connector
Satlantic SatPAR Cosine Optional built-in
log amplifier
600 or
7000 m
Voltage or RS-232 output;
MCBH connector
Biospherical QSP-2300L 4 pi Built-in log amplifier 2000 m LSG connector
QSP-2350L 4 pi Built-in log amplifier 2000 m MCBH connector
QCP-2300L Cosine Built-in log amplifier 2000 m LSG connector
QCP-2350L Cosine Built-in log amplifier 6350 m MCBH connector
QCP-2300L-HP Cosine Built-in log amplifier 10000 m XSG connector
QCP-2350L-HP Cosine Built-in log amplifier 10000 m BH connector
QSP-2200 (PD) 4 pi Requires log amplifier 2000 m LSG connector
QCP-2200 (PD) Cosine Requires log amplifier 2000 m LSG connector
1 Measurement Type:
  • 4 pi or Scalar or Spherical — Measures light independent of angle of incidence.
  • Cosine or Float — Measures downwelling irradiance (maximum response to light from directly overhead, no response to light coming directly from the side or below).

2 Output Type:

  • Built-in log amplifier — Connects directly to 0-5 V A/D channel on Sea-Bird CTD.
  • Requires log amplifier — Requires CTD configured with a built-in log amplifier, or Sea-Bird PN 90310 Log Amp Module. PN 90310 mounts on CTD or cage; PAR sensor connects to PN 90310, which connects to 0-5V A/D channel on CTD.

 

Fluorometers (also see Combination Sensors below)

Manufacturer Model # Measures Pumped? Output
Range 1
Maximum
Depth
Comments
WET Labs WETStar Chlorophyll 75, 150 ug/l (factory-set) 600 m Also available as non-pumped
WETStar CDOM 350 ppb 600 m Also available as non-pumped
ECO-FL(RT) Chlorophyll   30, 50, 125 ug/l 600 m  
ECO-FL(RT)D Chlorophyll   30, 50, 125 ug/l 6000 m  
ECO-FLS Chlorophyll   30, 50, 125 ug/l 300 m Bio-Wiper 2
ECO-FLCD(RT) CDOM   125, 250, 500 ppb 600 m  
ECO-FLCD(RT)D CDOM   125, 250, 500 ppb 6000 m  
ECO-FLCDS CDOM   125, 250, 500 ppb 300 m Bio-Wiper 2
Seapoint Chlorophyll Chlorophyll   5, 15, 50, 150 ug/l 6000 m  
Rhodamine Rhodamine   5, 15, 50, 150 ug/l 6000 m  
Ultraviolet (CDOM)

Ultraviolet
(CDOM)

  50, 150, 500, 1500 ug/l 6000 m  
Turner Cyclops-7 Chlorophyll
(with optional
flow through
cap)
50, 50, 500 ug/l 600 m  
1 WET Labs ECO ranges are adjustable with WET Labs setup cable and software; Seapoint and Turner ranges are adjustable with jumper cables.
2 WET Labs Bio-Wiper minimizes fouling in moored applications.

 

Turbidity Sensors (also see Combination Sensors below)

Manufacturer Model # Measurement
Type 1
Light Source Wavelength Output
Range 2
Maximum
Depth
Comments
WET Labs ECO-NTU(RT) Turbidity 700 nm 125, 1000 NTU 600 m  
ECO-NTU(RT)D Turbidity 700 nm 125, 1000 NTU 6000 m  
ECO-NTUS Turbidity 700 nm 125, 250, 1000 NTU 300 m Bio-Wiper 3
ECO-BB(RT) Single-angle
(117 deg) backscatter
470, 532, 650 nm 0 - 5 m -1 600 m  
ECO-BB(RT)D Single-angle
(117 deg) backscatter
470, 532, 650 nm 0 - 5 m -1 6000 m  
ECO-BBS Single-angle
(117 deg) backscatter
470, 532, 650 nm 0 - 5 m -1 300 m Bio-Wiper 3
Campbell
Scientific
D&A OBS 3+ Backscatter 850 nm 250, 1000 NTU 1500 m  
D&A OBS 3+ Backscatter 850 nm 500, 2000 NTU 1500 m  
D&A OBS 3+ Backscatter 850 nm 1000, 4000 NTU 1500 m  
Seapoint Turbidity Meter Turbidity 880 nm 25, 125, 500 750 FTU 6000 m  
1 Measurement type:
  • Backscatter — A light source illuminates a water sample, and a photodetector converts radiated light to photocurrent; the amount of photocurrent depends mainly on the area of the illuminated particles, but also on particle size, shape, and reflectivity. The signal is processed, generating an output voltage related to NTUs.
  • Seapoint Turbidity — Scattered light from suspended particles in the water is detected using dual 880 nm light sources and dual silicon photodiode detectors with visible light blocking filters. The sensor design confines the sensing volume to within 5 cm of the sensor windows.
  • Single-angle backscattering — Measures scattering at 117 degrees, the angle determined as a minimum convergence point for variations in the volume scattering function induced by suspended materials and water itself.

2 WET Labs ECO turbidity sensor range is factory set, but is adjustable downward with setup cable and WET Labs software.
Campbell Scientific and Seapoint sensor ranges is adjustable with jumper cables.
3 WET Labs Bio-Wiper minimizes fouling in moored applications.

 

Transmissometers

Manufacturer Model # Path Length Light Source Wavelength Pumped? Maximum Depth Comments
WET Labs C-Star CST-10-PR 10 cm 650 nm (red)
(with optional flow tube)
600 m  
C-Star CST-25-PR 25 cm 650 nm (red)
(with optional flow tube)
600 m  
C-Star Deep
CST-25-DR
25 cm 650 nm (red)
(with optional flow tube)
6000 m  
C-Star CST-10-PG 10 cm 532 nm (green)
(with optional flow tube)
600 m  
C-Star CST-25-PG 25 cm 532 nm (green)
(with optional flow tube)
600 m  
C-Star Deep
CST-25-DG
25 cm 532 nm (green)
(with optional flow tube)
6000 m  

 

Combination Sensors

Manufacturer Model # Measures Pumped? Output Range 1 Maximum Depth Comments
WET Labs ECO-FLNTU(RT) Chlorophyll fluorometer
& Turbidity
  30 ug/l & 10 NTU,
50 ug/l & 25 NTU,
50 ug/l & 100 NTU,
75 ug/l & 200 NTU,
250 ug/l & 1000 NTU
600 m  
ECO-FLNTU(RT)D Chlorophyll fluorometer
& Turbidity
  30 ug/l & 10 NTU,
50 ug/l & 25 NTU,
50 ug/l & 100 NTU,
250 ug/l & 1000 NTU
6000 m  
ECO-FLNTUS Chlorophyll fluorometer
& Turbidity
  30 ug/l & 10 NTU,
50 ug/l & 25 NTU,
50 ug/l & 100 NTU,
75 ug/l & 200 NTU,
250 ug/l & 1000 NTU
300 m Bio-wiper 2
ECO-FLbbCD
Triplet
Chlorophyll fluorometer,
CDOM fluorometer, &
single-angle (117 deg) backscatter
  Chlorophyll 30 ug/l,
CDOM 375 ppb,
Backscatter (700 nm) 0-3 m -1
2000 m  
ECO Custom
Triplet
3 sensors; any combination
of fluorescence
(chlorophyll, CDOM,
uranine, phycoerythrin,
phycocyanin, rhodamine)
and scattering (blue, green, red)
    600 m  
ECO Custom
Triplet-W
    600 m Wiper 2
1 ECO output ranges are factory set.
2 Bio-wiper or Wiper minimize fouling in moored applications.