Albedo is the diffuse reflection of shortwave solar radiation from a surface in the wavelength range 285 to 2800 nm. It is the ratio of reflected radiation to incoming radiation and varies from 0 (dark) to 1 (bright). For example, the albedo of grass is 0.15, that of dry sand is 0.5, and that of fresh snow is 0.8.
An albedometer consists of two pyranometers. The upward-facing sensor measures the incoming solar radiation, while the downward-facing sensor measures the radiation reflected from the surface. Once the two sensor signals are converted into a W/m² radiation value, the albedo can be easily calculated.
Its higher thermal mass and double glass dome make it more efficient. It is recommended for measurements in hydrological networks and in agriculture, as well as in solar systems.
The CMP6 pyranometer complies with the requirements of ISO 9060 and IEC 60904, as well as the WMO guidelines and the WMO "First Class" classification. The CMP6 comes standard with a level, corresponding adjustment screws, and a 10 m plug-in cable. It is individually calibrated and delivered with a calibration certificate.
Due to its measurement principle, the pyranometer does not require a power supply. It provides an output signal of 0 to 20 mV, proportional to the incoming radiation. If a larger voltage output signal or a 4 to 20 mA signal is required, the use of a transducer is recommended.
