Simplified Low-Cost LED Nephelometer and Turbidity Experiments for Practical Teaching
John O’Donoghue, Lucy Fitzsimmons
Abstract
This work describes the design and testing of a low-cost light-emitting diode (LED)-based nephelometer for turbidity analysis. It also describes the use of this nephelometer for context-based learning (CBL) experiments designed for teaching laboratories. The LED nephelometer is simple, low-cost, and robust, providing similar results as a commercial device. Data collection and analysis is quick and intuitive, allowing time and opportunity for discussion about the analytical process and the chemistry involved. The experiments described here are based on real-world applications to emphasize the usefulness of chemical analysis and quantification of turbidity in everyday life.
Topics & Concepts
NephelometerTurbidityContext (archaeology)Computer scienceProcess (computing)Process engineeringEnvironmental scienceOpticsEngineeringLight scatteringPhysicsGeographyGeologyScatteringOperating systemArchaeologyOceanographyWater Quality Monitoring TechnologiesWater Quality Monitoring and AnalysisBiosensors and Analytical Detection