Prototype Development of Water Turbidity Measuring Device with ARDUINO UNO and LCD LMB16A Display

A water turbidity measuring device has developed using Arduino Uno based phototransistor sensor. Working principle of the measuring device was fabricated with nephelometric method, the main sensor components consist of a phototransistor as a detector and LED as a light source which is designed in such a way with 90o position (upright position). The measuring device utilizes scattered light by particles in the water. The intensity of light passing through the scattering particles is detected by the phototransistor system sensor (detector) which provide analog signal of voltage. The incoming voltage will be processed in the Arduino Uno and the result obtained are converted into NTU (Nephelometric Turbidity Units) and displayed on 2x16 LCD. Measurement limit of this device is obtaining turbidity levels between 0 NTU to 100 NTU.