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Rotronic CP11 | CO2 meter meter

Contact Instrument Solutions

Available to purchase from Instrument Solutions is the Rotronic CP11 is a handheld instrument that simultaneously measures and records CO2, humidity and temperature. It also calculates the dew point and wet bulb temperature. Equipped with the field-tested ROTRONIC HYGROMER IN-1 humidity sensor, this instruments offers unbeatable value for money. Using the ROTRONIC HW4-Light software that comes with the device, it can be set as required and data can be downloaded, saved and analysed.

Typical applications include indoor air quality studies, and safety studies in car parks.


  • Measures and logs CO2, relative humidity and temperature
  • Calculates the dew point
  • 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
  • Display with backlight
  • Adjustable auto power off function
  • Mini USB interface


Dimensions       77 mm x 42 mm x 234 mm

Weight      290 g

Range of application      0 to 50 °C / 0.1 to 99.9 % rh, non-condensing

Accuracy at 23 ± 5 °C       ± 30 ppm ± 5 % of the measured value, < 2.5 % rh (10 to 90 % rh), ± 0.3 K

Measuring range      0 to 5000 ppm, 0.1 to 99.95 % rh, - 20 to + 60 °C

Measurement principle      Non dispersive infrared (NDIR) with automatic baseline correction

Adjustment points      0, 400 ppm and 35, 80 % rh

Pressure dependence       + 1.6 % reading per kPa

Null drift      < 10 ppm / year

Power supply       4 x AA batteries / optional AC adapter AC1214

Current consumption       40 mA (typical)

Battery life       50 h

Measured value memory       18,000 values with time stamp, automatic recording (% rh / °C / ppm), 99 single values with time stamp, manual recording, (% rh / °C / DP / Tw / ppm)

Warm-up time       < 1 minute

Long term stability       < 1.5 % rh per year

Humidity sensor      Rotronic HYGROMER® IN-1

Temperature sensor       Thermistor

Response time     < 10 sec @ 30 cc / min. flow, < 3 min diffusion time

Response time t63      < 30 s, without filter

Calculations     Dew point, wet bulb temperature

Parameters shown       CO2, relative humidity and temperature

Clock       Real time clock

Alarm functions       Adjustable for CO2 measurement

Housing       ABS

IP protection rating      IP30

Support documents

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Rotronic CP11 data sheet.pdf Rotronic CP11 data sheet
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Rotronic CP11 short user manual.pdf Rotronic CP11 short user manual
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