---
title: HMCharacteristicValueCarbonDioxideDetectionStatus.notDetected
framework: homekit
role: symbol
role_heading: Case
path: homekit/hmcharacteristicvaluecarbondioxidedetectionstatus/notdetected
---

# HMCharacteristicValueCarbonDioxideDetectionStatus.notDetected

Carbon dioxide levels are normal.

## Declaration

```swift
case notDetected
```

## See Also

### Carbon Dioxide Levels

- [HMCharacteristicValueCarbonDioxideDetectionStatus.detected](homekit/hmcharacteristicvaluecarbondioxidedetectionstatus/detected.md)