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RBRduetยณ T.ODO:
temperature and optical dissolved oxygen

Our most compact, lightweight, and versatile dual-channel logger.

  • High accuracy
  • Optical stability
  • Long deployments
  • Depths up to 6000m
  • One AA battery
  • USB-C download
  • Compact and lightweight
  • Cabledย ย RBRcoda3ย T.ODOย ย variant available
RBRduet

Features & Configurations

high accuracy

optical deployments

long deployments

DEPTHS UP TO 6000m

USB-C download

compact and lightweight

The RBRduetยณย T.ODO is a compact and rugged self-contained logger with two channels. It ensures high stability during extended deployments where accurate dissolved oxygen concentration and oxygen saturation measurements are critical.

The RBRduetยณย T.ODO is a perfect instrument for a wide variety of applications including oceanographic moorings, fishery studies, benthic pods, AUVs, gliders, and profiling floats.

The | fast variant (1s time constant) variant is well suited for profiling applications. The | slow (30s time constant) version has a protective layer to facilitate automated cleaning by a wiper to keep it biofouling free during long-term moored deployments.

Optional Configurations

  • RBRduetยณ T.ODOtemperature and dissolved oxygen, 8s time constant
  • RBRduetยณ T.ODO | slow temperature and dissolved oxygen, 30s time constant, used with wiper
  • RBRduetยณ T.ODO | fasttemperature and dissolved oxygen, 1s time constant
  • RBRduetยณ T.ODO | deeptemperature and dissolved oxygen, depths to 6000m

Specifications

Physical
Storage ~165 thousand samples*
* A sample may include multiple readings.
Power One AA cell (alkaline or lithium iron)
Communication USB-C
Clock drift ยฑ60 seconds/year
Housing Plastic or titanium
Depth rating 1000m (plastic), 6000m (Ti)
Diameter ~25mm (housing), ~30mm (at sensor)
Length ~310mm
Weight (air) 200g (plastic), 400g (Ti)
Weight (water) 40g (plastic), 240g (Ti)
Temperature
Calibrated range -5ยฐC to 35ยฐC
Initial accuracy ยฑ0.002ยฐC
Resolution <0.00005ยฐC
Typical stability ยฑ0.002ยฐC/year
Time constant <1s
Oxygen
Calibrated range 0-500ฮผM concentration
0 โ€“ 120% saturation
1.5ยฐC to 30ยฐC temperature
Initial accuracy

Maximum of ยฑ8ยตM or ยฑ5% |โ€‰fast
Maximum of ยฑ2ฮผmol/L or ยฑ1.5% standard
Maximum of ยฑ2ฮผmol/L or ยฑ1.5% |โ€‰slow

Resolution <1ยตmol/L (saturation 0.4%) |โ€‰fast
<0.5ฮผmol/L (saturation 0.2%) standard
<0.1ฮผmol/L (saturation 0.04%) |โ€‰slow
Time constant <1s |โ€‰fast, <8s standard, <30s |โ€‰slow
Sampling rates 24hr to 2Hz

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