A Power Quality Analyzer is an advanced electrical measurement instrument used to monitor, record, and analyze the quality of electrical power in a system. It measures key parameters such as voltage, current, frequency, harmonics, power factor, and electrical disturbances in real time. In Bangladesh, Power Quality Analyzers are widely used in industries, power plants, and commercial facilities to ensure stable and efficient electrical supply. These devices help engineers identify issues like voltage fluctuations, harmonics distortion, transient spikes, and load imbalances that can damage sensitive equipment. By providing detailed data analysis, a Power Quality Analyzer helps improve system reliability, reduce downtime, and enhance energy efficiency. It is an essential tool for modern electrical maintenance and industrial power management systems.