LP PYRA 05 Albedometer composed of 2 First Class pyranometers according to ISO 9060. Complete with: upper and bottom shade disk, desiccant sachet with silica-gel crystals, 2 cartridges, spirit level, support bracket with 10m cable and Report of Calibration.
LP PYRA 06-5 Albedometer composed of 2 Second Class pyranometers according to ISO 9060. Complete with: top and bottom shade disk, support rod and Report of Calibration. 5m cable.
There are two different models of albedometers: LP PYRA 05 is constructed starting from two 1^st class* pyranometers and the LP PYRA 06 starting from two 2^nd class* pyranometers (* according to ISO 9060 standards and to specifications published by the World Meteorological Organization).

An albedometer basically consists of two pyranometers, mounted back-to-back, one looking upward (sky) and one downward (earth). 

The upward pyranometer measures the incident global radiation (direct radiation + diffuse radiation) striking the ground, while the downward one, measures the global radiation reflected from the ground.

The outputs of the two pyranometers electric signals (the two pyranometers which made up of the LP PYRA 05 are coupled in order to have the same sensitivity) can be directly sent to a data logger or to an automatic
data processor. 

Albedo is the fraction of solar radiation that is reflected from the ground, with respect to incident radiation.