The Wöhler CDL 210 CO₂ data logger and the Wöhler CDL 110 data monitor are CO₂ monitors (also known as CO₂ traffic lights) for continuous monitoring of the carbon dioxide concentration (in ppm) and other indoor air quality factors.

• CO₂ monitor with temperature and humidity display
• Large carbon dioxide (CO₂) measuring range up to 9,999 ppm by true infrared CO₂ measurement (NDIR)
• Display of CO₂ concentration, temperature and humidity on the large display
• Accustic and visual alert when the preset carbon dioxide concentration is exceeded
• CO₂ data logger with adjustable log rates (Wöhler CDL 210 only)
• Protection against data loss in case of power failure (Wöhler CDL 210 only)
• Wöhler indoor climate software for reading out and evaluating the measured data (Wöhler CDL 210 only)

The CO₂ monitor is ideally suited for monitoring the CO₂ concentration in buildings. The CO₂ content is crucial for determining the indoor air quality and helps to optimize one's own ventilation behavior. Air temperature and humidity are also displayed and support you in a problem analysis (such as discomfort, humidity, mold, concentration problems).