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# sample

A recording that the sensor reader fetches.

```
@NSCopying var sample: SampleType { get }
```

## Discussion

The framework expects the app to know the result type based on the reader’s sensor.

### Sample types

This property’s type is a superclass from which the framework derives discrete sample types. Depending on the sensor associated with your app’s sensor reader, type cast the fetch result’s [`sample`](/documentation/SensorKit/SRFetchResult/sample) to the sensor’s associated sample type. The following list provides the sample type per sensor:

- [`accelerometer`](/documentation/SensorKit/SRSensor/accelerometer): [<doc://com.apple.documentation/documentation/CoreMotion/CMRecordedAccelerometerData>]
- [`ambientLightSensor`](/documentation/SensorKit/SRSensor/ambientLightSensor): [`SRAmbientLightSample`](/documentation/SensorKit/SRAmbientLightSample)
- [`ambientPressure`](/documentation/SensorKit/SRSensor/ambientPressure): `[`<doc://com.apple.documentation/documentation/CoreMotion/CMRecordedPressureData>`]`
- [`deviceUsageReport`](/documentation/SensorKit/SRSensor/deviceUsageReport): [`SRDeviceUsageReport`](/documentation/SensorKit/SRDeviceUsageReport)
- [`faceMetrics`](/documentation/SensorKit/SRSensor/faceMetrics): [`SRFaceMetrics`](/documentation/SensorKit/SRFaceMetrics)
- [`heartRate`](/documentation/SensorKit/SRSensor/heartRate): <doc://com.apple.documentation/documentation/CoreMotion/CMHighFrequencyHeartRateData>
- [`keyboardMetrics`](/documentation/SensorKit/SRSensor/keyboardMetrics): [`SRKeyboardMetrics`](/documentation/SensorKit/SRKeyboardMetrics)
- [`mediaEvents`](/documentation/SensorKit/SRSensor/mediaEvents): [`SRMediaEvent`](/documentation/SensorKit/SRMediaEvent)
- [`messagesUsageReport`](/documentation/SensorKit/SRSensor/messagesUsageReport): [`SRMessagesUsageReport`](/documentation/SensorKit/SRMessagesUsageReport)
- [`odometer`](/documentation/SensorKit/SRSensor/odometer): <doc://com.apple.documentation/documentation/CoreMotion/CMOdometerData>
- [`onWristState`](/documentation/SensorKit/SRSensor/onWristState): [`SRWristDetection`](/documentation/SensorKit/SRWristDetection)
- [`pedometerData`](/documentation/SensorKit/SRSensor/pedometerData): <doc://com.apple.documentation/documentation/CoreMotion/CMPedometerData>
- [`phoneUsageReport`](/documentation/SensorKit/SRSensor/phoneUsageReport): [`SRPhoneUsageReport`](/documentation/SensorKit/SRPhoneUsageReport)
- [`rotationRate`](/documentation/SensorKit/SRSensor/rotationRate): [<doc://com.apple.documentation/documentation/CoreMotion/CMRecordedRotationRateData>]
- [`siriSpeechMetrics`](/documentation/SensorKit/SRSensor/siriSpeechMetrics): [`SRSpeechMetrics`](/documentation/SensorKit/SRSpeechMetrics)
- [`telephonySpeechMetrics`](/documentation/SensorKit/SRSensor/telephonySpeechMetrics): [`SRSpeechMetrics`](/documentation/SensorKit/SRSpeechMetrics)
- [`visits`](/documentation/SensorKit/SRSensor/visits): [`SRVisit`](/documentation/SensorKit/SRVisit)
- [`wristTemperature`](/documentation/SensorKit/SRSensor/wristTemperature): [`SRWristTemperature`](/documentation/SensorKit/SRWristTemperature)

---

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