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RBRcoda Tu: turbidity sensor

The RBRcoda Tu is a realtime turbidity sensor with two independent optical channels for optimising linearity and sensitivity. Its high dynamic range permits exposure to full sunlight with exceptionally low detection limits, while fast sampling rates, low power consumption, and high depth rating have been tailored for use in a wide variety of applications.

  • Low power consumption
  • High sensitivity
  • High dynamic range
  • Depths up to 6000m
  • MCBH-6-MP on all units
  • RS-232 output
  • Compact and lightweight
RBRcoda Tu: turbidity sensor

Features & Configurations

Low power consumption

High Sensitivity

High dynamic range

Depths up to 6000m

RS-232 output

Compact and lightweight

The turbidity channel of the RBRcoda Tu ensures high sensitivity in the low range (0-1000FTU), while the optical backscatter channel is designed for high-turbidity applications (up to 20000FTU). All optical components of the RBRcoda Tu are robust and durable, selected to minimise aging due to UV/sunlight exposure, and thus show no change in properties over extended deployments. Its sapphire windows facilitate automated cleaning by a wiper to keep them free of biofouling during long-term moored deployments.

Specifications

Physical
Connector MCBH-6-MP
Communications RS-232
Depth rating 6000m
Housing Titanium
Diameter 25mm
Length 65mm (100mm with connector)
Weight 110g in air, 70g in water
Operating temperature range -5°C to +35°C
Sampling rate Up to 32Hz
Power
Supply voltage 4.5V to 30V (12V nominal)
Power 2.3mJ/sample (4Hz or slower)
42mW (8Hz or faster)
Sleep current 10µA at 12V
Turbidity
Wavelength 880nm
Centroid angle 90°
Linearity, R 0.99
Initial accuracy 5%
Calibrated range 0 – 1000FTU
Measurement range1 0 – 1500FTU

(1) Response becomes non-linear above 500FTU.

Turbidity (optical backscatter)
Wavelength 880nm
Centroid angle 135°
Linearity, R² 0.99
Initial accuracy 5%
Calibrated range 1000-4000FTU
Measurement range2 0 – 20000FTU
Detection limit 2.0FTU

(2) Response becomes non-linear below 500FTU and above 15000FTU.

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