Abstract: Air Quality monitoring system monitors the environmental air quality. Now a days air pollution rates in developing and developed countries increase, so it requires more portable and cost effective air quality monitoring devices. Pollution measuring chambers are available in developed countries. The polluted air is harmful for health. In developing countries all services not available commonly. In this paper the review of various air quality monitoring systems is done. These systems measure the concentration of oxygen, carbon dioxide, carbon monoxide, nitrogen dioxide, sulfur dioxide, light intensity sensor, humidity, temperature respectively. All readings will be displayed on Android smart phone. According to threshold values of sensors alarm will be ring. GSM/GPRS Modem is used to send data wirelessly to the server pc. In some systems global positioning system is used for indication of location, date, time. Sensor data is automatically stored in SD card storage module for future use. Such systems prevent hazardous health problems as well as enhance air quality.
Keywords: Sensors; Air Quality; Air Pollution; Health.