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Glass Domes and Silicon Windows
Two-way radiometer compatible with most Campbell dataloggers
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Technical Description

The CNR2 Net Radiometer consists of a pyranometer and pyrgeometer pair that face upward and a complementary pair that face downward. The pyranometers and pyrgeometers measure short-wave and far infrared radiation, respectively. Field-of-view is 180 degrees for the upper pyranometer, and 150 degrees for the lower pyranometer. Both upper and lower pyrgeometers provide a 150 degree field-of-view.

Glass domes and silicon windows protect the sensors from environmental factors, minimize the effects of wind and rain on measurements, and are easy to clean. Replaceable drying cartridges prevent condensation on the sensors.

The CNR2 outputs a millivolt signal that our dataloggers measure.

CNR2-L Specifications

  • Pyranometer Spectral Range:
    310 to 2800 nm
  • Pyrgeometer Spectral Range:
    4.5 to 42 μm
  • Response Time: < 10 s
  • Temperature Dependence of Sensitivity:
    < 5% (-10° to +40ºC)
  • Sensitivity Range: 10 to 20 μV W-1 m2
  • Output Range
    Pyranometer: 0 to 50 mV
    Pyrgeometer: ±5 mV
  • Sensitivity Change per Year:
    < 1%
  • Tilt Error: < 1%
  • Uncertainty in Daily Total:
    < 10%
  • Sensor Asymmetry: < 5%
  • Directional Error:
    < 20 W m-2 (pyranometer)
  • Operating Temperature: -40° to 80°C
  • Dome Diameter:
    1.5 cm (0.6 in.)
  • Length: 19.5 cm (7.7 in)
  • Weight without cable:
    250 g (8.8 oz)
  • Cable Weight:
    300 g (10.6 oz) with 30 ft length
  • CE Compliance: Conforms to the CE guideline 89/336/EEC 73/23/EEC

Resources and Links

Ships With

(2) WRR Traceable Calibration Certificates (one for short wave and one for long wave)

(2) 20645 Drying Cartridges

(1) CNR2CBL-L Cable with user-specified length