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In India Air quality is being monitor at more than 573 fixed stations across the country through manual or automatic measurements. The current fixed monitoring stations use sophisticated instrumentation to measure the ambient air quality. The operation and maintenance of these fixed stations are expensive. For the data captured by these fixed stations may not reflect spatial variation of urban air quality. In this context, there is a need for cost effective real time air quality monitoring system. Salient features of Air Quality Measurement System: Semiconductor sensors for CO2, CO, particulates, temperature and humidity. Data transmission through GSM/LAN and IoT.