SRA11 albedometer

SRA11 analogue first class albedometer kit
Analogue first class albedometer

SRA11 first class albedometer is an instrument that measures global and reflected solar radiation and the solar albedo, or solar reflectance. It is composed of two SR11 first class pyranometers, one sun screen, one glare screen and one fixture with rod. Mounting hardware and tools are included. Each pyranometer has a thermopile sensor and offers output in millivolt; the upfacing one measuring global solar radiation, the downfacing one measuring reflected solar radiation. SRA11 complies with the latest ISO and WMO standards. The modular design facilitates maintenance and calibration.

Specifications
Measurand
  • global solar radiation and reflected solar radiation
Optional measurand
  • albedo or solar reflectance
  • net solar radiation
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Specifications

Measurand
  • global solar radiation and reflected solar radiation
Measurement range
  • 0 to 2000 W/m²
Optional measurand
  • albedo or solar reflectance
  • net solar radiation
Sensitivity (nominal)
  • 15 x 10⁻⁶ V/(W/m²)
Included sensors
  • 2 x identical ISO 9060 first class pyranometer
Output
  • analogue millivolt
Mounting
  • mounting rod with 15 x 10⁻³ m diameter
Calibration uncertainty
  • < 1.8 % (k = 2)
Calibration traceability
  • to WRR
Spectral range
  • 285 to 3000 x 10⁻⁹ m
Rated operating temperature range
  • -40 to +80 °C
Temperature response
  • < ± 2 % (-10 to +40 °C)
Standard cable length
  • 5 m (see options)
Options
  • longer cables, in multiples of 5 m, cable lengths above 20 m in multiples of 10 m
Manuals & Downloads

Description

SRA11 analogue first class albedometer kit

Albedo, also called solar reflectance, is defined as the ratio of the reflected to the global radiation. The solar albedo depends on the directional distribution of incoming radiation and on surface properties at ground level. Albedos of typical surfaces range from about 4 % for fresh asphalt, and 15 % for green grass to 90 % for fresh snow.Using SRA11 albedometer is easy. The instrument is composed of two SR11 first class  pyranometers; the upfacing one measuring global solar radiation, the downfacing one measuring reflected solar radiation. The irradiance in W/m² in each direction is calculated by dividing the pyranometer output, a small voltage, by the sensitivity. The sensitivity of both pyranometers is provided on the SRA11 product certificate. The working principle and specifications of the pyranometers can be found in the SR11 user manual. SRA11’s analogue output is in millivolt. SRA11 can be connected directly to commonly used datalogging systems.

Suggested use

  • high-accuracy meteorological observations
  • building physics, roof reflectance studies
  • extreme climates (tropical / polar)
SRA11 albedometer
SRA11 analogue first class albedometer kit
  • improved measurement accuracy
Would you like a personalised quote?

or contact us: info@hukseflux.com