Portable gas analyzer architecture integrates three electrochemical sensors (SO2, NO2, NH3) with dedicated signal conditioning modules feeding a centralized ADC converter. The microcontroller receives digitized gas readings plus direct inputs from temperature and humidity sensors for environmental compensation. Power management uses a rechargeable battery through a voltage regulator with external charging port, enabling field deployment. This layout demonstrates best practices for multi-sensor embedded systems requiring analog signal integrity and power efficiency. Fork this diagram on Diagrams.so to customize sensor types, add wireless connectivity modules, or adapt the power architecture for solar charging applications.