long deployments
RBRsolo⁴ : single-sensor logger
Our most compact, lightweight, and versatile single-sensor logger.
- Infinite memory*
- Any AA battery chemistry
- Standard sampling up to 2Hz, optionally up to 32Hz
- Optional tidal averaging and wave analysis
- USB-C download
*not really, but we stopped counting at billions of samples
Available sensors:
Temperature, Pressure, Optical Dissolved Oxygen, Turbidity, or Chlorophyll-a
Features & Configurations
*not really, but we stopped counting at billions
The RBRsolo4 is a compact, lightweight logger designed for high-precision oceanographic measurements in demanding environments. It combines exceptional accuracy and resolution using any standard AA battery chemistry.
Engineered for durability in harsh marine conditions, theRBRsolo4 delivers reliable, long-term performance across a wide range of oceanographic applications. The RBRsolo4 is easy to configure for your optimal sampling regime.
Infinite 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
| | fast | up to 32Hz continuous sampling |
|---|---|
| | tide32 | continuous sampling or tidal averaging |
| | wave32 | continuous sampling, tidal averaging, or wave burst |
| | deep | depths up to 10000m |
| | 2x | double the power of RBRsolo4 |
Specifications
| Storage | Infinite memoryFootnote * |
|---|---|
| Power | Any AA cell |
| Communication | USB-C |
| Clock drift | ±60 seconds/year |
| Depth rating | Up to 1700m (plastic), up to 10000m (Ti) |
| Diameter | ~25mm |
| Length | Varies per sensor |
| Weight | Varies per sensor |
*not really, but we stopped counting at billions of samples.
| Calibrated rangeFootnote* | -5°C to 35°C |
|---|---|
| Initial accuracy | ±0.002°C |
| Resolution | <0.00005°C |
| Typical stability | ±0.002°C/year |
| Time constant | <1s standard, <0.1s |fast |
*A wider temperature range is available on request. Contact RBR for more information.
| Calibrated rangeFootnote 1 | 20 / 50 / 100 / 200 / 500 / 1000dbar (plastic) |
|---|---|
| 2000 / 6000 / 10000dbar (Ti) | |
| Initial accuracyFootnote 2 | ±0.05% full scale |
| Resolution | <0.001% full scale |
| Typical Stability | ±0.05% full scale / year |
| Time constant | <10ms |
1Recommended depth for wave measurements is less than 100m.
2±0.01% full scale available is available upon request. Contact RBR for more information.
| Wavelength | 880nm |
|---|---|
| Centroid angle | 90° |
| Linearity, R | 0.99 |
| Initial accuracy | 5% |
| Calibrated range | 0 – 1000FTU |
| Measurement rangeFootnote * | 0 – 1500FTU |
*Response becomes non-linear above 1000FTU.
| Wavelength | 880nm |
|---|---|
| Centroid angle | 135° |
| Linearity, R² | 0.99 |
| Initial accuracy | 5% |
| Calibrated range | 1000-4000FTU |
| Measurement rangeFootnote* | 0 – 20000FTU |
| Detection limit | 2.0FTU |
* Response becomes non-linear below 500FTU and above 15000FTU.
| Wavelength | 470nm/695nm (excitation/emission) |
|---|---|
| Calibrated rangeFootnote* | 0-50µg/L |
| Measurement range | 0-500µg/L |
| Detection limit | 0.02µg/L |
* Scaled to the fluorescence response from a monoculture of Thalassiosira weissflogii.
| Linearity, R | 0.99 |
|---|---|
| Initial accuracy | 5% |
| Calibrated range | 0-500μM concentration 0 – 120% saturation 1.5°C to 30°C temperature |
|---|---|
| Initial accuracy | Maximum of ±8μmol/L or ±5% | fast Maximum of ±2μmol/L or ±1.5% standard Maximum of ±2μmol/L or ±1.5% | slow |
| Resolution | <1µmol/L (saturation 0.4%) | fast <0.5μmol/L (saturation 0.2%) standard <0.1μmol/L (saturation 0.04%) | slow |
| Time constant | <1s | fast, <8s standard, <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 (°)
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