long deployments
RBRsolo³ T: temperature
Our most compact, lightweight, and versatile single-channel temperature logger.
- Long deployments
- Compact and lightweight
- Any AA battery
- Standard sampling up to 2Hz, optionally up to 32Hz
- USB-C download
- Cabled RBRcoda3 T variant available

Features & Configurations
The RBRsolo³ T with a thermistor-type temperature sensor is our most compact, lightweight, and versatile single-channel instrument. Its small size lends itself to various applications from mooring to bore holes to profiling to towed arrays. It is ideal for long-term deployments, harsh environments, or anywhere where size is a concern. No other temperature logger on the market combines this level of accuracy with the ability to record 130M readings on a single battery. The | fast option provides an additional capability to sample at up to 32Hz.
The RBRsolo³ T is calibrated to an accuracy of ±0.002ºC (ITS-90 and NIST traceable standards). The standard thermistor has a time constant of approximately one second (100ms for the| fast option).
The RBRsolo³ T has a measurement range of -5°C to +35°C in its standard calibration. However, it can be calibrated from -40°C to +50°C. The housing has a depth rating of 1700m, whereas the RBRsolo³ T | deep can go up to 10km deep.
Optional Configurations
RBRsolo³ T | temperature, 2Hz continuous sampling, depths up to 1000m |
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RBRsolo³ T | deep | temperature, depths up to 10000m |
RBRsolo³ T | fast | temperature, up to 8Hz, 16Hz, or 32Hz continuous sampling |
Specifications
Storage | ~130M samples |
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Power | Any AA cell |
Communication | USB-C |
Clock drift | ±60 seconds/year |
Housing | Plastic or titanium |
Depth rating |
Up to 1700m (plastic) |
Diameter | ~25mm |
Length | ~240mm |
Weight | 120g in air, 20g in water (plastic) 320g in air, 220g in water (Ti) |
Calibrated range* | -5°C to 35°C *A wider temperature range is available upon request. Contact RBR for more information. |
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Initial accuracy | ±0.002°C |
Resolution | <0.00005°C |
Typical stability | ±0.002°C/year |
Time constant | <0.1s |fast, <1s standard |
2Hz | 140 days, 24M samples |
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16Hz | 93 days, 128M samples |
32Hz | 48 days, 130M samples |
