This series uses infrared technology for carbon dioxide gas detection. Available in wall mount or duct mount configurations. Also is available with digital display or high range capability. 
4102 Series
The Model 4102 Series are self-contained, wall mounted Carbon Dioxide sensors that can monitor a local area for Carbon Dioxide content. Each sensor module features a sensor covered with a porous material that allows the surrounding atmosphere to diffuse into the optical path, where it is analyzed for Carbon Dioxide by NDIR (Non-Dispersive Infrared) method. Models are available for duct mount for high range applications.
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