---
title: MTRCarbonDioxideConcentrationMeasurementMeasurementUnit.PM3
framework: matter
role: symbol
role_heading: Case
path: matter/mtrcarbondioxideconcentrationmeasurementmeasurementunit/pm3
---

# MTRCarbonDioxideConcentrationMeasurementMeasurementUnit.PM3

## Declaration

```swift
case PM3
```