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RBRvirtuoso3: single-channel logger
RBRduo3: dual-channel logger

Our most flexible, option-packed loggers with one or two channels.

  • 240M readings
  • Up to 32Hz sampling
  • USB-C download
  • Twist activation
  • Wi-Fi
  • | fast, | tide, | wave variants
  • External power option
  • RBRvirtuoso³single channel logger, depths up to 750m
  • RBRvirtuoso³ | deepsingle channel logger, depths up to 10000m
  • RBRduo³dual channel logger, depths up to 750m
  • RBRduo³ | deepdual channel logger, depths up to 10000m

Available sensors:

Conductivity (C), Temperature (T), Pressure (D), Dissolved Oxygen (DO), Optical Dissolved Oxygen (ODO), Photosynthetically Active Radiation (PAR), Radiometer (rad), Turbidity (Tu), Backscatter (bb), Fluorescence (Fl), chlorophyll-a (chl-a) pH, Oxidation-Reduction Potential (ORP), Carbon Dioxide, Voltage

Features & Configurations

Wi-Fi
ready

TWIST ACTIVATION

240M READINGS

UP TO 32Hz SAMPLING

USB-C Download

Realtime Communications

The RBRvirtuoso³ and RBRduo³ instruments can integrate almost any sensor from RBR, offering high accuracy, flexible schedules, USB-C download, Wi-Fi communication, and twist activation. Variants with pressure, temperature, radiometer, PAR, and turbidity sensors are also available in titanium housing for deep applications (| deep), designed to endure harsh conditions.

The RBRvirtuoso³ and RBRduo³ instruments facilitate optimal measurement schedules, whether moored, towed, or profiling. Large storage capacity and reliable battery power facilitate long deployments with higher sampling rates. Downloads are quick with USB-C. A dedicated holder makes it simple to replace desiccant before each deployment. The calibration coefficients are stored with the instrument, and only one software tool, Ruskin, is required to operate it. Datasets can be read directly in Matlab, or exported to Excel, OceanDataView®, or text files.

Optional Configurations

  • Wi-Fi communication
  • External data and power connection via connectorised end-caps
  • | fast8, | fast16, or | fast32 sampling for profiling
  • | tide16, | wave16 variants with wave burst and tidal averaging
  • | deep variants in titanium housing for depths up to 10000m

Specifications

Physical
Storage 240M readings
Power * 8 AA cells
External power 4.5 to 30V
Communication USB-C or RS-232/485
Clock drift ±60 seconds/year
Housing Plastic or titanium
Diameter 63.3mm (plastic), 60.3mm (Ti)
Length Configuration dependent
Weight Configuration dependent
Depth rating Up to 10000m (configuration dependent)
Sampling rate 2Hz; options up to 32Hz (configuration dependent)

* Lithium thionyl chloride batteries are only recommended for the RBRvirtuoso³ T, RBRvirtuoso³ D, RBRduo³ C.T, and RBRduo³ T.D. Use alkaline or lithium iron batteries for all other configurations.

Conductivity
Range 0-85mS/cm
Initial accuracy ±0.003mS/cm
Resolution <0.0001mS/cm
Typical stability ±0.010mS/cm per year
Temperature
Range* -5°C to 35°C
Initial accuracy ±0.002°C
Resolution <0.00005°C
Typical stability ±0.002°C/year
Time constant <0.1s |fast, <1s standard

* A wider temperature range is available upon request. Contact RBR for more information.

Pressure (Depth)
Range* 20 / 50 / 100 / 200 / 500 / 750dbar (plastic)
1000 / 2000 / 4000 / 6000 / 10000mdbar (Ti)
Initial accuracy ±0.05% full scale
Resolution <0.001% full scale
Time constant <0.01s
Typical stability ±0.05% full scale per year

* Recommended depth for wave measurements is less than 50m.

Turbidity
Wavelength 880nm
Centroid angle 90°
Linearity, R 0.99
Initial accuracy 5%
Calibrated range 0 – 1000FTU
Measurement range* 0 – 1500FTU
Detection limit 0.005FTU

* Response becomes non-linear above 1000FTU.

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

* Response becomes non-linear below 500FTU and above 15000FTU.

Chlorophyll-a
Wavelength 470nm/695nm (excitation/emission)
Calibrated range* 0-50µg/L
Measurement range 0-500µg/L
Detection limit* 0.02µg/L

* Scaled for the in vivo fluorescence response.

Optical
Linearity, R 0.99
Initial accuracy 5%
Oxygen
Calibrated range 0-500μM concentration
0 – 120% saturation
1.5°C to 30°C temperature
Initial accuracy Maximum of ±2μmol/L or ±1.5%
Maximum of ±8μmol/L or ±5% | fast
Maximum of ±2μmol/L or ±1.5% | slow
Resolution <0.5μmol/L (saturation 0.2%)
<1µmol/L (saturation 0.4%) | fast
<0.1μmol/L (saturation 0.04%) | slow
Time constant <8s standard, <1s | fast, <30s | slow
Sampling rates 24hr to 1Hz


Output values

  • Temperature (°C)
  • Dissolved O2 concentration (μmol/L)
  • Dissolved O2 concentration (salinity compensated, μmol/L)
  • Dissolved O2 saturation (%)
  • Dissolved O2 phase (°)

Contact RBR for other sensor options.

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