---
title: HMCharacteristicValueCarbonMonoxideDetectionStatus.notDetected
framework: homekit
role: symbol
role_heading: Case
path: homekit/hmcharacteristicvaluecarbonmonoxidedetectionstatus/notdetected
---

# HMCharacteristicValueCarbonMonoxideDetectionStatus.notDetected

Carbon monoxide levels are normal.

## Declaration

```swift
case notDetected
```

## See Also

### Carbon Monoxide Levels

- [HMCharacteristicValueCarbonMonoxideDetectionStatus.detected](homekit/hmcharacteristicvaluecarbonmonoxidedetectionstatus/detected.md)