"The precision UV-B Radiometer MS-212W is designed to measure the UV-B radiation with high reliability. It is calibrated against a NIST traceable standard. The combination of a well designed UV-B filter and a GaAsP photodiode guarantees its high performance to measure UV-B between 280 and 320nm. The energy in this spectral range accounts for 4 to 5% of the total solar radiation.","• UV Stabilized UV-B Filter Optics • Spectral Response 280 - 315nm • Dual Voltage Output 10mV \/ 1V • Low Temperature Dependency"