# CO2

<figure><img src="/files/K7PLXUpXyXQhccYyZoU0" alt=""><figcaption></figcaption></figure>

The sensor used is GMP251.

The incubator is equipped with an external CO2 sensor port on top, in the right back corner.

<figure><img src="/files/n9xyELsTIcjbFcQ6XK9z" alt=""><figcaption></figcaption></figure>

To install it, use the reduction defined in [Accessories](/external-sensors-in-incubators/k-systems/g210-invicell-plus/accessories.md).


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