Short-/Long-wave UV Irradiance Light Meter with Datalogging. The SDL470-NIST is a UVA/UVC Light Meter and Data logger. The SDL470NIST can measure both long wave and short wave UV irradiance under UVA and UVC light sources respectively. This meter features a cosine correction filter, data logging to Excel format, offset adjustment for relative measurements, type K/J thermocouple input for temperature measurements (probe sold separately), record/recall modes, min and max readings, data hold plus auto power off with disable function. This product comes with a built-in tilt stand, SD memory card, UVA light sensor with protective cover, UVC light sensor, hard case, universal AC adaptor, 6 x AA batteries and NIST Certificate