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Rotronic CL11 (offer) | CO2 data logger

Contact Instrument Solutions


The Rotronic CL11 benchtop display unit is a multiple parameter meter that simultaneously measures and records carbon dioxide (CO2), humidity and temperature. Equipped with the Rotronic HYGROMER IN-1 humidity sensor, this instrument offers unbeatable value for money. Using the Rotronic software package SW2.x, it can be easily set to record as required and data can then be downloaded, saved and analyzed.

This instrument is ideal for indoor air quality (IAQ) / indoor environmental quality (IEQ) studies in schools, offices or domestic dwellings.

*** Excess stock x1 unit *** 2018 list prices £379.00 now available at fantastic offer price of only £323.00.


  • Measures and logs CO2, relative humidity and temperature
  • Rotronic HYGROMER IN-1 humidity sensor
  • 40,000 data point memory for CO2, humidity and temperature values
  • Maximum, minimum and average values displayed
  • Adjustable audible and visual CO2 alarm
  • Real time clock with backup battery
  • Optional external temperature probe (supplied as standard with Instrument Solutions Hire models)
  • Includes software for configuration and data download


Dimensions 157 mm x 120 mm x 45 mm

Weight approximately 200 g

Range of application 0 to 50 °C / 0 to 100 % 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 5,000 ppm; 0 to 100 % rh; - 20 to + 60 °C

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

Adjustment points Automatic calibration, manual calibration at 400 ppm and 35, 80 % rh

Pressure dependence + 1.6 % reading per kPa

Null drift < 10 ppm / year

Measured value memory 40,000 values with time stamp, automatic recording (% rh / °C / CO2 / external temperature probe)

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 and 4 s

Response time t 63 < 30 s, without filter

Parameters displayed CO2, relative humidity and temperature

Power supply AC mains with battery back-up of real time clock

Alarm indicators Adjustable for CO2 measurement

Exploitation software Rotronic SW2.x

Housing ABS

IP protection rating IP30

Support documents

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Rotronic CL11 data sheet.pdf Rotronic CL11 data sheet
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Rotronic CL11 user guide.pdf Rotronic CL11 user guide
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