Net radiometer NR01

solar

Overview
The NR01 is a market leading 4-component net radiometer, mostly used in scientific-grade energy balance and surface flux studies. It offers 4 separate measurements of global and reflected solar and downwelling and upwelling longwave radiation, using 2 sensors facing up and 2 facing down. NR01 owes its popularity to its excellent price/performance ratio and major improvements relative to comparable instruments. Advantages include its modular design with 2 pairs of identical sensors, low weight, ease of levelling, and low solar offsets in the longwave measurement. The unique capability to heat the pyrgeometers reduces measurement errors caused by dew deposition.

Key features
• Breakthrough pricing: High performance at a significantly lower price level, as a result of Hukx’s technological innovation.
• Built-in heating for pyrgeometers: reduces measurement errors caused by dew and moisture deposition, improving data availability and reliability in humid conditions.
• Uses two “spectrally flat” pyranometers that are WMO compliant, which is essential for reflected solar radiation measurement.
• Modular sensor design: uses two identical pyranometers and two identical pyrgeometers, simplifying maintenance and ensuring measurement consistency.
• Integrated instrument temperature sensor: equipped with a Pt100 temperature sensor for temperature compensation and calculation of longwave radiation
• Pyranometers calibrated in accordance with ISO 9847 and calibrations traceable to the WRR (World Radiometric Reference) for pyranometers and the WISG (World Infrared Standard Group) for pyrgeometers

Applications
• Energy balance studies: measurement of net radiation to support research on surface energy budgets and energy exchange between the atmosphere and the Earth's surface.
• Surface flux measurements: radiation monitoring for studies of heat and moisture transfer in environmental, agricultural, and ecological research.
• Climatological monitoring networks: long-term radiation measurements for weather, climate, and environmental observation programs.

Specifications
• Measurands: longwave radiation, global solar radiation, reflected solar radiation, downward longwave radiation, and upward longwave radiation. [W/m²]
• Optional measurands: sky temperature and surface temperature [°C]
• Optional measurands: albedo or solar reflectance and sunshine duration
• Spectral range solar: 285 to 3000 nm
• Spectral range longwave: 4.5 to 42 × 10⁻⁶ m
• Field of view pyranometers: 180°
• Field of view pyrgeometers: 150°
• Operating temperature range: -40 °C to +80 °C
• Calibration uncertainty solar: < 2.4 %
• Calibration uncertainty solar: < 7 %
• Temperature sensor: Pt100
• Standard cable length: 2 x 5 m

Cable length options
• 2 x 5 m
• Longer cable, in multiples of 5 m
• Cable lengths above 20 m in multiples of 10 m