EXO’s left LCD screen is the Live readings screen. EXO's multi-gas cartridge sensor configuration determines the layout of this screen.

The Live readings screen displays live gas and gamma readings for each sensor. Each sensor reading card remains green when the device is in a normal operating state.

The gas reading cards change to yellow when a low-urgency notification is activated or change to red when a high-urgency notification is activated.

The gas card changes to white during bump tests and calibrations to indicate that gas events are paused for the duration of the operation.