The LI200RX pyranometer measures both sun and sky solar radiation with a silicon photovoltaic detector mounted in a cosine-corrected head. The cable contains circuitry that standardizes sensor calibration, allowing complete sensors and cabling to be swapped out in the field without having to change the data logger programming.  This pyranometer connects directly to Campbell Scientific data loggers and is ideal for agricultural and meteorological applications. The LI200RX is calibrated for natural light. Campbell Scientific does not recommend using the LI200RX under artificial light or plant canopy.