CW-808 series carbon dioxide transmitter is used to monitor and control the concentration of carbon dioxide. It is used for monitoring and controlling the ventilation system of garage or service center, workshop and other buildings, which can effectively reduce energy consumption and meet the relevant standards of building ventilation and energy saving, and adopts the use of ventilation system for start-stop control or automatic control according to carbon dioxide concentration. The product adopts imported infrared carbon dioxide sensor, there are a variety of output signals to choose from, which can meet different measurement environments and a series of high-precision, high-stability measurement requirements.