The NR-Lite is a rugged net radiometer manufactured by Kipp & Zonen. Net radiometers measure the energy balance between incoming short-wave and long-wave IR radiation relative to surface-reflected short-wave and outgoing long-wave IR radiation. This net radiometer includes two black conical absorbers, one facing upward and the other facing downward. They are coated in PTFE, making them resistant to weather without requiring a fragile plastic dome. Both absorbers are calibrated to an identical sensitivity coefficient. The only difference between the NR-Lite and the NR-Lite2 is the color of the wires.