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RBRsolo³ PAR, RBRsolo³ rad

PAR and narrow-band logging radiometers

The RBRsolo³ PAR and RBRsolo³ rad logging radiometers feature a wide dynamic range, optimized cosine response, and excellent low-light detection, making them ideal for both moored and profiling applications. Both instruments feature a rugged, low-power design that allows for long deployments with a single AA battery.

  • Long deployments
  • High accuracy
  • Wide dynamic range
  • One AA battery (alkaline or lithium iron)
  • USB-C download
  • Compact and lightweight
  • Cabled RBRcoda³ radiometers available

Features & Configurations

long deployments

high accuracy

wide dynamic range

one aa battery

USB-C download

compact and lightweight

The RBRsolo³ PAR provides uniform response to light in the PAR spectral range, while the RBRsolo³ rad is available in a variety of narrow-band light channels and channel widths. Large storage capacity and reliable battery power facilitate long deployments with higher sampling rates. Downloads are quick with USB-C. A dedicated desiccant 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

RBRsolo³ PAR photosynthetically active radiation, uniform response between 400 and 700nm, depths up to 1000m
RBRsolo³ PAR | deep photosynthetically active radiation, uniform response between 400 and 700nm, depths up to 2000m
RBRsolo³ rad narrow-band radiation, 10nm- and 25nm-wide wavelength channels from 413nm to 560nm, depths up to 1000m
RBRsolo³ rad | deep narrow-band radiation, 10nm- and 25nm-wide wavelength channels from 413nm to 560nm, depths up to 2000m

Specifications

Physical
Storage ~130M readings
Power One AA cell (alkaline or lithium iron)
Communication USB-C
Clock drift ±60 seconds/year
Diffuser Acrylic
Housing Plastic or titanium
Diameter ~25mm
Length ~250mm
Depth rating 1000m (plastic)
2000m (titanium)
Weight (air) 140g (plastic)
320g (titanium)
Weight (water) 15g (plastic)
195g (titanium)
Sampling rate Up to 16Hz
Power consumption
Sampling 12mJ per sample (1Hz or slower)
6mA/22mW (2Hz or faster)
Sleep current 10µA
Optical radiometry
Dynamic range >5.5 decades
Initial accuracy1 ±2%
Linearity ±1%
Operating temperature range -5°C to 35°C
Cosine response error (water) ±5% at 0-60°
±10% at 61-82°
Azimuth error (water) ±1.5% at 45°
Out-of-band rejection2 >25dB (typical), OD 2.5

(1) RBR calibrates radiometers with NIST traceable references.

(2) Out-of-band rejection and resolution are wavelength dependent for narrow-band radiometers.

Photosynthetically active radiation
Wavelength range 400 to 700nm
Full scale range 0-5000µmol/m²/s (minimum)
Resolution ±0.010μmol/m²/s
Narrow-band wavelength channels
Centre wavelengths (CWL)3 413 / 445 / 475 / 488 / 508 / 532 / 560nm
Full width at half-maximum (FWHM) 10nm (for all CWLs except 475nm)
>25nm (for CWL 475nm only)
Full scale range 0-400μW/cm²/nm (minimum)
Resolution4 ±0.001μW/cm²/nm

(3) Other CWL options within the 400-1100nm range are available upon request. Contact RBR for more information.

(4) Resolution is wavelength dependent for narrow-band radiometers.

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