long deployments
RBRduet⁴ T.D: dual-sensor compact logger
Our most compact, lightweight, and versatile temperature and pressure logger.
- Infinite memory*
- Any AA battery
- Standard sampling up to 2Hz, and optionally up to 32Hz
- Optional tidal averaging and wave analysis available
- Optional deep variant available for <10000m
- USB-C download
- Long deployments
- Compact and lightweight
*not really, but we stopped counting at billions.
See also: Compact | Tide & Wave and Standard | Tide & Wave
Features & Configurations
*not really, but we stopped counting at billions
The RBRduet4 T.D is built for long, accurate field use with low effort. Delivering high accuracy in a compact, field-ready form factor, it combines lab-grade performance with deployment simplicity. USB-C enables fast configuration and data download, while support for standard AA battery chemistry provides global power options.
Paired with Ruskin software for intuitive setup and retrieval, the RBRduet4 T.D is designed for exceptionally long deployments, using RBR’s latest ultra-low-power electronics to maximize endurance without compromising precision. Data are stored in RSK format and are accessible using RBR’s open Python and MATLAB toolboxes, enabling direct integration into workflows and automated processing pipelines. Ruskin provides Excel exports and publication-ready charts in PNG and PDF formats, ensuring straightforward reporting, analysis, and archiving.
Engineered for durability in harsh marine conditions, theRBRduet4 T.D delivers reliable, long-term performance across a wide range of oceanographic applications.
Optional Configurations
| RBRduet4 T.D | temperature and pressure; up to 2Hz continuous sampling, depths up to 1000m |
|---|---|
| RBRduet4 T.D | fast | temperature and pressure; up to 32Hz continuous sampling |
| RBRduet4 T.D | tide32 | temperature and pressure; continuous sampling or tidal averaging |
| RBRduet4 T.D | wave32 | temperature and pressure; continuous sampling, tidal averaging, or wave burst |
| RBRduet4 T.D | deep | temperature and pressure; depths up to 10000m |
| RBRduet4 T.D | 2x | temperature and pressure; double the power of the RBRduet4 T.D |
Specifications
| Storage | Infinite memoryFootnote 1 |
|---|---|
| Power | Any AA cell |
| Communication | USB-C |
| Clock drift | ±60 seconds/year |
| Housing | Plastic or titanium |
| Depth rating | Up to 1000m (plastic) Up to 10000m (Ti) |
| Diameter | ~25mm |
| LengthFootnote 2 | 274mm (plastic), 278mm (Ti) |
| WeightFootnote 3 | 170g in air, 30g in water (plastic) |
| 390g in air, 255g in water (Ti) |
1not really, but we stopped counting at billions of samples.
2For |2x variant add ~65mm (plastic), ~70mm (Ti).
3For |2x variant in air add ~35g (plastic), ~95g (Ti), in water add ~60g (Ti)
| 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 / 100 / 300 / 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.
| 5s | 713 days, 12.3M samples |
|---|---|
| 2Hz | 99 days, 17.1M samples |
| 32Hz | 14 days, 39M samples |
| |2x variant | |
| 5s | 3.9 years, 24.6M samples |
| 2Hz | 199 days, 34.3M samples |
| 32Hz | 28 days, 78M samples |
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