Ocean Optics SR-2UVV240-25, calibrated for irradiance measurements. Has a direct attached cosine corrector (diffuser), for easy positioning, when measuring power from UV lamps, or LEDs. This spectrometer is installed with a grating blazed at 240 nm for UV irradiance measurements. System includes, USB cable, flash drive with calibration file, and calibration certificate dated in October 2023. Requires Oceanview software.