---
title: HMServiceTypeCarbonDioxideSensor
framework: homekit
role: symbol
role_heading: Global Variable
path: homekit/hmservicetypecarbondioxidesensor
---

# HMServiceTypeCarbonDioxideSensor

A carbon dioxide sensor service.

## Declaration

```swift
let HMServiceTypeCarbonDioxideSensor: String
```

## See Also

### Air Quality and Smoke Detection

- [HMServiceTypeAirPurifier](homekit/hmservicetypeairpurifier.md)
- [HMServiceTypeAirQualitySensor](homekit/hmservicetypeairqualitysensor.md)
- [HMServiceTypeCarbonMonoxideSensor](homekit/hmservicetypecarbonmonoxidesensor.md)
- [HMServiceTypeSmokeSensor](homekit/hmservicetypesmokesensor.md)