• Usually ships in 1-2 weeks



  • Measures and records CO2, relative humidity and temperature
  • Ranges: 0 to 5000 ppm CO2/ 0 to 100 %RH / -20 to 60 °C
  • Accuracy: ±30 ppm + 5% of measured value of CO2 / ±2.5 %RH / ±5 °C
  • Measurement principle Infrared (NDIR) with automatic calibration (ABC)
  • Rotronic HYGROMER® IN-1 humidity sensor
  • 18,000 data point memory for CO2, humidity and temperature values
  • Large, easy-to-read display also shows date and time
  • USB access for data download
  • Alarm indicators adjustable for CO2 measurement
  • Long term stability < 1.5 %RH per year
  • ABS housing
  • CE / EMC conform 2004/108/EC


The Rotronic CO2 Display is a wall-mounted or bench-top unit that simultaneously measures and records CO2, humidity and temperature. Equipped with the field-tested Rotronic HYGROMER® IN-1 humidity sensor, this instrument offers unbeatable value for money. The instrument can be configured directly with buttons and stored data can be exported to a USB stick for analysis with the free Rotronic software package SW21.

The Rotronic CO2 Display evaluates the quality of air with a combined measurement of CO2M, humidity and temperature. A high concentration of carbon dioxide can develop quickly when closed rooms with deficient ventilation are filled with people. The proportion of CO2M in natural ambient air is about 0.04 % or 400 ppm. When humans and animals exhale this gas, it mixes quickly with the ambient air and can rise to dangerous levels. The Rotronic CO2 Display allows users to quickly evaluate CO2 levels in classrooms, meeting rooms, open-plan offices, shopping centers, fitness studios, or any other place where people congregate.