Microplate reader consists of a silicon photodiode as a photodetector and an optical system with 8-channel optical fiber scanning. It can store 500 test items and 10,000,000 test data points and perform 12 different tests on just one plate. The system is equipped with a USB interface for easy connection to the PC. It works on a single or dual wavelength, gives qualitative and quantitative data evaluation, and also consists of an LED or tungsten halogen lamp as a light source.