The ELC-300 autoranging radiometer from Electro-Lite Corp. measures the UV performance of spot-cure and production-process systems. This optical sensing device measures irradiance in the 300- to 400-nm range and rejects what is not relevant to the process. The data are converted to digital form and are displayed in liquid crystal readout as UV out- put. The radiometer can measure UV irradiance up to 20 W/cm2 and can plot in milliwatts per square centimeter, millijoules, joules and case temperature. It also allows the user to download stored measurements to a PC for system validation.