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.
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.
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 with 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:
- Put your Laser Egg+ CO2 by the window, making sure it’s exposed to fresh outdoor air, and keep it connected to your Wi-Fi at the same time.
- Leave the device running until the CO2 concentration reading has stabilized, within a +/- 6% window. Make sure not to exhale at the device during the process.
- Open your Kaiterra app, and enter the device setting page. Initiate the manual calibration process by pressing the “Calibration” button.
- 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.