Voltcraft co 100 room air meter voltcraft co 100 p the voltcraft co 100 room air meter is a stationary co sup2 meter for the determination of the carbon dioxide concentration co sup2 in the ambience air with the precise and long term stable ndir measuring method non dispersive infrared absorption measurement p p bad air quality is usually the cause for illness or tiredness and decreases the concentration and efficiency the co 100 is used to monitor the carbon dioxide content in t