How to calibrate the CO2 sensor in your Laser Egg+ CO2

The Kaiterra Laser Egg+ CO2 is equipped with a non-dispersive infrared (NDIR) sensor to calculate the CO2 concentration in the air. The Laser Egg+ CO2 can be automatically calibrated over time, and can also be calibrated manually as needed.

Automatic Calibration

All sensors drift over time, but thanks to the built-in self-correcting ABC-algorithm (Automatic Baseline Correction), the calibration process is automated.

The ABC-algorithm constantly keeps track of the sensor’s lowest reading over time and slowly corrects for any long-term drift. In a normal indoor environment, the CO2 level drops to nearly outside air at some point during a week. The sensor will sample the CO2 values for a week and compare the lowest reading to the background level value reading, and adjust the baseline accordingly.

Manual Calibration

Because of the nature of NDIR sensors, there may be a reduction in accuracy because of rough handling, transportation, and aging. The ABC-function can tune the readings back to the correct level for an extended period of time. However, you can also choose to calibrate your device manually for a faster result if you notice a significant drift.

Follow the steps below to manually calibrate your Laser Egg+ CO2:

  1. Put your Laser Egg+ CO2 by a window, making sure it’s exposed to fresh outdoor air, and keep it connected to your Wi-Fi at the same time.
  2. Leave the device running until the CO2 concentration reading has stabilized, within a +/- 6% window. Make sure not to exhale near the device during this process.
  3. Open your Kaiterra Live Air app, and enter the device setting page. Initiate the manual calibration process by pressing the “Calibration” button.
  4. The CO2 concentration should read stably below 450ppm and your manual calibration is done. If not, please perform the process again.


The Laser Egg+ CO2 is capable of correcting smaller drifts automatically using the ABC-algorithm over an extended period of time (over 7 days). Manual calibration is only recommended when there’s a significant drift in CO2 readings.