Development of optical fiber sensor for water quality measurement

The development of water quality fiber sensor through spectroscopy analysis utilizes the emission of incident light and detection of backscattered light through fiber optic cables as key elements of the design. The system has the capability to detect the light scattered 180 degrees away from the incident light when there is an interaction between the light and the solids suspended in the water. The empirical analysis is conducted for the measurement of the capacity of clay suspended in water (in mg/L). The system consists of two separate light detector circuitry that is sensitive to blue (470nm) and red (635nm) monochromatic light. The heart of the system is the sensor, TSLB257 and TSLR257 that having a peak response at wavelength of 470nm and 635nm respectively. The final result of detection is submitted to Basic Stamp 2 microcontroller for processing and analysis. The level of turbidity is then defined and displayed by the microcontroller.