System for low intensity fluorescence light measurement based on Silicon Photomultiplier

In the paper a measurement system for low intensity light is presented. This system has been adapted for fluorescence light measurement, generated by fluorescein solution with pH equal 8.1. The whole system is capable of measuring the fluorescence light intensity of the solution deposited in a transparent cuvette, and positioned in a specially prepared optical system. A new semiconductor device, called Silicon Photomultiplier (SiPM) has been used as a light sensor, because of its sensitivity to single photons.