Zigbee Carbon Dioxide Sensor 1.detect indoor air quality 2.can measure C02, temperature ... C02,temperature, humidity and VOC Small size and cheap price Can auto control devices such as air-conditioner etc Production ... at the same time. It has small size and cheap price. By RS485 and RS232 port output,it can measure ... .youtube.com/watch?v=yH85FfJE_tE&feature=youtu.be Zigbee Wireless Carbon Dioxide Sensor