Concentration Measurements in Liquid Substances Using a Simple Optoelectronics System.

Abstract

This work presents an optoelectronic system capable of measuring the turbidity of liquid substances based on optical fiber and using the principle of light transmission and reflection. Photo detector voltage response is correlated with concentration of solutes. In this case, concentration determines turbidity. Our research reports the degree of concentration of soluble coffee, milk, and soil to prove its operation. The results shown are relevant to know that turbidity in certain substances depends on the amount of suspended particles in a water sample and their physical properties, among which solubility and density stand out.