1 in stock

Need Help? Call 1-800-884-4967 8:00am to 5:30pm ET


  • Measures and logs CO2, relative humidity and temperature
  • Range: 0 to 5000 ppm CO2, 00 to 100 %RH, -20 to 60 °C
  • Accuracy: ±30 ppm CO2 ±5 % of the measured value, < 2.5 %RH (10 to 90 %RH), ±0.3 °K
  • Non dispersive infrared (NDIR) sensor with automatic baseline correction (ABC)
  • Hygromer® IN-1 humidity sensor
  • 40,000 data point memory for CO2, humidity and temperature values
  • Maximum, minimum and average value display
  • Adjustable audible CO2 alarm
  • Real time clock with backup battery
  • Optional external temperature probe
  • Includes software for configuration and data download
  • IP30 protection rating

What's in the Box

  • AC adapter
  • SW2.x software

The Rotronic CL11 desktop indoor air quality meter is the latest development of an inexpensive multiple parameter meter 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 instrument 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 analyzed.

Rotronic Calibration Devices
Various calibration devices for Rotronic probes
Rotronic Humidity Standards
Five ampoules of the same humidity value