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SRA01 Albedometer

Updated:2025-03-13

Brand: Hukseflux
Model: SRA01
Description: SRA01 albedometer is an instrument that measures global and reflected solar radiation and the solar albedo, or solar reflectance. It is composed of two identical second class pyranometers with thermop
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Product Details

SRA01 Albedometer Description：

User's Manual Datasheet

SRA01 albedometer is an instrument that measures global and reflected solar radiation and the solar albedo, or solar reflectance. It is composed of two identical second class pyranometers with thermopile sensors, the upfacing one measuring global solar radiation, the downfacing one measuring reflected solar radiation. SRA01 complies with the latest ISO and WMO standards.

Measures global and reflected solar radiation and the solar albedo, or solar reflectance

Composed of two identical second class pyranometers with thermopile sensors

Complies with the latest ISO and WMO standards

Albedo Measurement

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.

SRA01 Design

Using SRA01 is easy. The albedometer is composed of two 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, model SR01, is provided on the SRA01 product certificate. The albedo is calculated by dividing the reflected radiation by the global radiation. The working principle and specifications of the pyranometers can be found in the SRA01 manual. SRA01 can be connected directly to commonly used datalogging systems.

Applications

Albedometers are used for general meteorological observations, building physics, roof reflectance studies, climate studies and solar collector testing. A common application is for outdoor solar radiation measurements as part of a meteorological station. This application requires horizontal leveling; a bubble level is included. SRA01 is made to fit a ¾ inch NPS mounting tube. SRA01 can be ordered with longer cable and optional sun screens

Suggested Use：

Agricultural networks

General meteorological observations

Building physics, roof reflectance studies

Areas of Application：

Meteorology / surface energy flux measurement

Accessories：

ALF01

CMF01

SRA01 Albedometer Specifications：

Measurand	hemispherical 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 second class pyranometer
Mounting	¾ inch NPS tube (not included)
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	< ± 3 % (-10 to +40 °C)
Standard cable length	5 m (see options)