RBRsolo³ |deep & RBRduet³ |deep

Our most compact, lightweight, and versatile temperature logger for deepwater applications.

  • Standard sampling up to 2Hz, and optionally up to 32Hz
  • ~25M readings on a single AA battery
  • USB-C download
  • Cabled RBRcoda³ variant available
The RBRsolo³ T|deep, RBRsolo³ D|deep, and RBRduet³ T.D deep in titanium are small but incredibly strong. Deployable to the bottom of the Marianas Trench, they still provide temperature accuracy of ±0.002°C and are capable of storing 25 million readings on a single battery. Flexible measurement schedules, standard sampling up to 2Hz, optionally up to 32Hz, and USB-C download complement the raw capabilities of this design.

The RBRsolo³ T | deep, RBRsolo³ D| deep, and RBRduet³ T.D| deep are three of the most flexible recorders available from RBR and, like all RBR instruments, the calibration coefficients are stored with the logger. Dataset export to Matlab, Excel, OceanDataView®, or text files makes post processing with your own algorithms effortless.


Power Any AA cell
Communication USB-C
Clock drift ±60 seconds/year
Depth rating 10,000m
Diameter 25.0mm
Length ~230mm
Weight (air) <400g
Weight (water) <70g


Calibrated measurement range -5°C to 35°C
Initial accuracy ±0.002°C
Resolution <0.00005°C
Time constant ~1s (open) or 10s (embedded)
Typical stability 0.002°C/year
Sample capacity (2Hz or slower) ~25M readings


Range 1000 / 2000 / 4000 / 6000 / 10,000m
Initial accuracy ±0.05 FS
Resolution 0.001% FS
Time constant <0.01s
Typical stability 0.1% FS per year
Sample capacity (2Hz or slower) ~25M readings