The Extech SDL470 is a UVA/UVC Light Meter and Data Logger. The SDL470 can measure long and short wave UV irradiance using UVA and UVC light sources, respectively. This meter has a cosine correction filter, data logging in Excel® format, offset adjustment for relative measurements, a Type-K/J thermocouple input for temperature measurements (probe sold separately), record/recall modes, min and max readings, data hold, and auto power off with disable function. This device includes a built-in tilt stand, SD memory card, UVA light sensor with protective cover, UVC light sensor, hard case, universal AC adaptor, and six AA batteries.