CMA6 and CMA11 Albedometers
The Vaisala CMA6 and CMA11 Albedometers are suitable for
measuring net global radiation and/or albedo over many different types of
surface. Both sensors offer the same sensitivity. They also have conical lower
screens to prevent illumination of the lower glass dome at sunrise and sunset.
A white screen prevents the body from heating up. The
albedometers are equipped with a spirit level and screws for accurate levelling,
and a drying cartridge keeps the interior free from humidity. All albedometers
are supplied with a calibration certificate. The albedometers provide two
operating modes: net global radiation is measured with the sensors connected in
anti-series. Separate recordings of the outputs and a subsequent measurement of
the ratio of one output to the other yields the albedo
calculation.