---
title: HKMetadataKeyDeviceSerialNumber
framework: healthkit
role: symbol
role_heading: Global Variable
path: healthkit/hkmetadatakeydeviceserialnumber
---

# HKMetadataKeyDeviceSerialNumber

The key for the serial number of the device that generated the data.

## Declaration

```swift
let HKMetadataKeyDeviceSerialNumber: String
```

## Discussion

Discussion This key takes a string value.

## See Also

### Device Information Keys

- [HKMetadataKeyUDIDeviceIdentifier](healthkit/hkmetadatakeyudideviceidentifier.md)
- [HKMetadataKeyUDIProductionIdentifier](healthkit/hkmetadatakeyudiproductionidentifier.md)
- [HKMetadataKeyDigitalSignature](healthkit/hkmetadatakeydigitalsignature.md)
- [HKMetadataKeyDeviceName](healthkit/hkmetadatakeydevicename.md)
- [HKMetadataKeyDeviceManufacturerName](healthkit/hkmetadatakeydevicemanufacturername.md)
- [HKMetadataKeyDevicePlacementSide](healthkit/hkmetadatakeydeviceplacementside.md)
- [HKDevicePlacementSide](healthkit/hkdeviceplacementside.md)
- [HKMetadataKeyAppleDeviceCalibrated](healthkit/hkmetadatakeyappledevicecalibrated.md)