Four-component measurement of net radiation with black-body pyranometers and pyrgeometers
Digital Output
An on-board 24-bit A to D converter processes the signals from the individual sensors and transmits the data via a digital SDI-12 output. Also available with Modbus RS-232/RS-485 communications protocols. Users can select to output net radiation, net longwave radiation, net shortwave radiation, and/or each component sensor reading. The digital outputs eliminate the need for multiple analog datalogger channels to measure each of the four components of net radiation.
Compact and Light Weight
The small lightweight design radiometer facilitates easy mounting to a cross arm using the AM-500 mounting bracket. The bracket facilitates precision leveling.
Four-component Net Radiometer
Four-component net radiometer consists of a blackbody pyranometer and pyrgeometer pair that face upward to provide incoming shortwave and longwave radiation measurements and a complementary pair that face downward to provide outgoing shortwave and longwave radiation measurements. Individual sensors measure the four separate components of net radiation for best accuracy.
Heated Sensors
Each of the four sensors includes a 0.2 W heater that keeps water (liquid and frozen) off the sensors and minimizes errors caused when dew, frost, rain, or snow block the radiation path. Heaters can be turned off to save additional power when they are not needed through SDI-12 commands.
Typical Applications
Net radiation is a key variable in the surface energy balance and influences turbulent fluxes, including evapotranspiration. Applications include measurements on flux towers and weather stations.
Accurate and Affordable
Research-grade accuracy comparable to other four-component net radiometers, but at a lower cost.
Warranty and Support
All Apogee products are backed by an industry-leading four year warranty and outstanding customer support.
