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# HMCharacteristicValueCarbonMonoxideDetectionStatus

Possible values for the state of carbon monoxide level detection.

```
enum HMCharacteristicValueCarbonMonoxideDetectionStatus
```

## Topics

### Carbon Monoxide Levels

[`HMCharacteristicValueCarbonMonoxideDetectionStatus.notDetected`](/documentation/HomeKit/HMCharacteristicValueCarbonMonoxideDetectionStatus/notDetected)

Carbon monoxide levels are normal.

[`HMCharacteristicValueCarbonMonoxideDetectionStatus.detected`](/documentation/HomeKit/HMCharacteristicValueCarbonMonoxideDetectionStatus/detected)

Abnormally high levels of carbon monoxide are present.


---

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