REG010016FRPP5N00000 is a part of Raystar's Optical Sensors, which are designed for detection and measuring applications in medical, industrial, and automotive test and measurement, laboratory, and entertainment markets. This specific part is an optical detector, which is designed to detect and measure visible light, infrared, and ultraviolet radiation. The device is capable of measuring temperatures from -40°C to +125°C and pulse widths from 100s down to 1s.