Micro Photo-electricity Ion Concentration Detecting System for Environmental Monitoring

A micro photoelectricity system for environmental monitoring is developed in this paper. The detection is based on the theory of substance absorbency. The developed system is composed by a light-emitting diode (LED) as light emission component, a photocell as brightness taking-over component and appropriate circuits. The whole system is light, cheap and portable and it has many advantages such as few optical elements, high measurement accuracy, structure simplicity, small volume etc. The first-step experimental results indicate that the minitype photo-electricity system has realized to detect the solution zinc ion concentration and it shows a great potential for extensive applications.