---
title: HMServiceTypeCarbonMonoxideSensor
framework: homekit
role: symbol
role_heading: Global Variable
path: homekit/hmservicetypecarbonmonoxidesensor
---

# HMServiceTypeCarbonMonoxideSensor

A carbon monoxide sensor service.

## Declaration

```swift
let HMServiceTypeCarbonMonoxideSensor: String
```

## See Also

### Air Quality and Smoke Detection

- [HMServiceTypeAirPurifier](homekit/hmservicetypeairpurifier.md)
- [HMServiceTypeAirQualitySensor](homekit/hmservicetypeairqualitysensor.md)
- [HMServiceTypeCarbonDioxideSensor](homekit/hmservicetypecarbondioxidesensor.md)
- [HMServiceTypeSmokeSensor](homekit/hmservicetypesmokesensor.md)