Handheld CO2, Humidity and Temperature Meter


The CP11 portable meter is an economical multi-parameter instrument that simultaneously measures and records CO2, humidity and temperature. It also offers the calculation of the dew point and the wet bulb temperature. Equipped with the ROTRONIC HYGROMER® IN-1 sensing element, proven by years of service and highly appreciated by customers, this device offers an unbeatable price / performance ratio. With the supplied software, ROTRONIC SW21, this measuring instrument, which can be parameterized according to customer wishes, can download data, save and analyze it.


  • Measures and records CO2, relative humidity and temperature
  • Accuracy: ±30 ppm, ±2.5 %RH, ±0.3 K
  • ROTRONIC HYGROMER IN-1 humidity sensor
  • 18,000 data point memory for CO2, humidity and temperature values
  • Maximum, minimum and average value display
  • Adjustable audible CO2 alarm
  • Adjustable automatic power off function
  • Includes logging and configuration software, USB data cable and case


Parameter / CalculatedCO2, Relative Humidity and Temperature
Measuring Range0….5000 ppm (CO2), 0…50 °C; 0…95 %RH (0…100 % RH CL11)
CO2 SensorInfrared (NDIR) with automatic calibration (ABC)
CO2 Accuracy±30 ppm ±5 % of the measured value
Humidity Accuracy±2 %RH @ 25°C
Temperature SensorNTC
Temperature Accuracy±0.3 °K
Power Supply4 x AA batteries / optional AC adapter AC1214
Battery life50 h
FunctionMIN / MAX /AVG
Storage Capacity18000 values with time stamp, automatic recording ( %RH / °C / ppm )
Log intervall1s…4.59 h
Dimension76.7 x 41.8 x 233.9 mm

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