This document is a product manual for a UV Light Sensor that can be used with a Field Scout Light Sensor Reader or WatchDog weather station or data logger to measure and log UV radiation between 250-400 nanometers. It provides instructions on mounting the sensor and connecting it to these devices, as well as guidance on positioning the sensor to properly monitor plant conditions. The sensor has a measurement range of 0-200 亮Mol/m2s with 5% accuracy and outputs a voltage that corresponds to UV levels.