The sensor module can be installed in consumer electronics to measure the indoor air quality. It can be built in refrigerators, TV sets, air conditioners, vacuum cleaners, and air fresheners to measure the air quality and issue an alarm or send the data to the server through cable or wireless.

The accumulated data can be used in turn to understand the living pattern of households, determine if such living patterns are environmentally sound, and prevent health-related problems that are caused by bad quality of indoor air.

CO2 sensors built in refrigerators, kimchi refrigerators, and large capacity refrigerators can be used to indirectly check the state of food materials, attracting attention for their differentiation and effectiveness.